[FunctionAttrs] Annotate "willreturn" for intrinsics

[uenoku]

Summary

In D62801, new function attribute willreturn was introduced. In short, a function with willreturn is guaranteed to come back to the call site(more precise definition is in LangRef).

In this patch, willreturn is annotated for LLVM intrinsics.

[jdoerfert]

More opportunities for willreturn.

llvm/include/llvm/IR/Intrinsics.td

456

willreturn (among other properties)

463

willreturn (among other properties)

507

willreturn (among other properties) for all three above.

585

willreturn (among other properties)

714

willreturn (among other properties)

757

willreturn (among other properties)

814

willreturn (among other properties) the 4 above

827

willreturn (among other properties) for the below intrinsics:
overflow, saturation, fix point, and combinations thereof

924

willreturn (among other properties) all 6 above

1024

willreturn (among other properties)

1033

willreturn (among other properties)

1044

willreturn (among other properties)

1090

willreturn (among other properties) for 8 above.

1142

willreturn (among other properties) the 3 above

1144

willreturn (among other properties) all reductions

[uenoku]

Address comments.

[jdoerfert]

llvm/test/Transforms/Inline/noalias-calls.ll

37

Why do the numbers above change but no willreturn is visible?

[uenoku]

Address comment.

[jdoerfert]

Assuming the tests pass, LGTM.

[uenoku]

Rebase.

[uenoku]

Minor fix.

clang/test/CodeGen/libcalls.c

 // CHECK-NO: declare x86_fp80 @llvm.log.f80(x86_fp80) [[NUW_RNI]]
 // CHECK-NO: declare float @llvm.log.f32(float) [[NUW_RNI]]
 // CHECK-YES-NOT: declare double @log(double) [[NUW_RN]]
 // CHECK-YES-NOT: declare x86_fp80 @logl(x86_fp80) [[NUW_RN]]
 // CHECK-YES-NOT: declare float @logf(float) [[NUW_RN]]
 }
 
 // CHECK-NO-DAG: attributes [[NUW_RN]] = { nounwind readnone{{.*}} }
-// CHECK-NO-DAG: attributes [[NUW_RNI]] = { nounwind readnone speculatable }
+// CHECK-NO-DAG: attributes [[NUW_RNI]] = { nounwind readnone speculatable willreturn }

llvm/include/llvm/IR/Intrinsics.td

def int_thread_pointer : Intrinsic<[llvm_ptr_ty], [], [IntrNoMem]>,
                          GCCBuiltin<"__builtin_thread_pointer">;
 
 // IntrInaccessibleMemOrArgMemOnly is a little more pessimistic than strictly
 // necessary for prefetch, however it does conveniently prevent the prefetch
 // from being reordered overly much with respect to nearby access to the same
 // memory while not impeding optimization.
 def int_prefetch
     : Intrinsic<[], [ llvm_anyptr_ty, llvm_i32_ty, llvm_i32_ty, llvm_i32_ty ],
-                [ IntrInaccessibleMemOrArgMemOnly, ReadOnly<0>, NoCapture<0>,
+                [ IntrInaccessibleMemOrArgMemOnly, IntrWillReturn, ReadOnly<0>, NoCapture<0>,
                   ImmArg<1>, ImmArg<2>]>;
 def int_pcmarker      : Intrinsic<[], [llvm_i32_ty]>;
 
 def int_readcyclecounter : Intrinsic<[llvm_i64_ty]>;
 
 // The assume intrinsic is marked as arbitrarily writing so that proper
 // control dependencies will be maintained.
-def int_assume        : Intrinsic<[], [llvm_i1_ty], []>;
+def int_assume        : Intrinsic<[], [llvm_i1_ty], [IntrWillReturn]>;
 
 // Stack Protector Intrinsic - The stackprotector intrinsic writes the stack
 // guard to the correct place on the stack frame.
 def int_stackprotector : Intrinsic<[], [llvm_ptr_ty, llvm_ptrptr_ty], []>;
 def int_stackguard : Intrinsic<[llvm_ptr_ty], [], []>;
 
 // A counter increment for instrumentation based profiling.
 def int_instrprof_increment : Intrinsic<[],
def int_instrprof_value_profile : Intrinsic<[],
                                             []>;
 
 //===------------------- Standard C Library Intrinsics --------------------===//
 //
 
 def int_memcpy  : Intrinsic<[],
                              [llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty,
                               llvm_i1_ty],
-                            [IntrArgMemOnly, NoCapture<0>, NoCapture<1>,
+                            [IntrArgMemOnly, IntrWillReturn, NoCapture<0>, NoCapture<1>,
                              WriteOnly<0>, ReadOnly<1>, ImmArg<3>]>;
 def int_memmove : Intrinsic<[],
                             [llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty,
                              llvm_i1_ty],
-                            [IntrArgMemOnly, NoCapture<0>, NoCapture<1>,
+                            [IntrArgMemOnly, IntrWillReturn, NoCapture<0>, NoCapture<1>,
                              ReadOnly<1>, ImmArg<3>]>;
 def int_memset  : Intrinsic<[],
                             [llvm_anyptr_ty, llvm_i8_ty, llvm_anyint_ty,
                              llvm_i1_ty],
-                            [IntrArgMemOnly, NoCapture<0>, WriteOnly<0>,
+                            [IntrArgMemOnly, IntrWillReturn, NoCapture<0>, WriteOnly<0>,
                             ImmArg<3>]>;
 
 // FIXME: Add version of these floating point intrinsics which allow non-default
 // rounding modes and FP exception handling.
 
-let IntrProperties = [IntrNoMem, IntrSpeculatable] in {
+let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_fma  : Intrinsic<[llvm_anyfloat_ty],
                            [LLVMMatchType<0>, LLVMMatchType<0>,
                             LLVMMatchType<0>]>;
   def int_fmuladd : Intrinsic<[llvm_anyfloat_ty],
                               [LLVMMatchType<0>, LLVMMatchType<0>,
                                LLVMMatchType<0>]>;
 
   // These functions do not read memory, but are sensitive to the
let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_lround : Intrinsic<[llvm_anyint_ty], [llvm_anyfloat_ty]>;
   def int_llround : Intrinsic<[llvm_anyint_ty], [llvm_anyfloat_ty]>;
   def int_lrint : Intrinsic<[llvm_anyint_ty], [llvm_anyfloat_ty]>;
   def int_llrint : Intrinsic<[llvm_anyint_ty], [llvm_anyfloat_ty]>;
 }
 
 def int_minnum : Intrinsic<[llvm_anyfloat_ty],
   [LLVMMatchType<0>, LLVMMatchType<0>],
-  [IntrNoMem, IntrSpeculatable, Commutative]
+  [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]
 >;
 def int_maxnum : Intrinsic<[llvm_anyfloat_ty],
   [LLVMMatchType<0>, LLVMMatchType<0>],
-  [IntrNoMem, IntrSpeculatable, Commutative]
+  [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]
 >;
 def int_minimum : Intrinsic<[llvm_anyfloat_ty],
   [LLVMMatchType<0>, LLVMMatchType<0>],
-  [IntrNoMem, IntrSpeculatable, Commutative]
+  [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]
 >;
 def int_maximum : Intrinsic<[llvm_anyfloat_ty],
   [LLVMMatchType<0>, LLVMMatchType<0>],
-  [IntrNoMem, IntrSpeculatable, Commutative]
+  [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]
 >;
 
 // NOTE: these are internal interfaces.
 def int_setjmp     : Intrinsic<[llvm_i32_ty],  [llvm_ptr_ty]>;
 def int_longjmp    : Intrinsic<[], [llvm_ptr_ty, llvm_i32_ty], [IntrNoReturn]>;
 def int_sigsetjmp  : Intrinsic<[llvm_i32_ty] , [llvm_ptr_ty, llvm_i32_ty]>;
 def int_siglongjmp : Intrinsic<[], [llvm_ptr_ty, llvm_i32_ty], [IntrNoReturn]>;
 
 // Internal interface for object size checking
 def int_objectsize : Intrinsic<[llvm_anyint_ty],
                                [llvm_anyptr_ty, llvm_i1_ty,
                                 llvm_i1_ty, llvm_i1_ty],
                                [IntrNoMem, IntrSpeculatable, ImmArg<1>, ImmArg<2>, ImmArg<3>]>,
                                GCCBuiltin<"__builtin_object_size">;
 
 //===--------------- Constrained Floating Point Intrinsics ----------------===//
 //
 
-let IntrProperties = [IntrInaccessibleMemOnly] in {
+let IntrProperties = [IntrInaccessibleMemOnly, IntrWillReturn] in {
   def int_experimental_constrained_fadd : Intrinsic<[ llvm_anyfloat_ty ],
                                                     [ LLVMMatchType<0>,
                                                       LLVMMatchType<0>,
                                                       llvm_metadata_ty,
                                                       llvm_metadata_ty ]>;
   def int_experimental_constrained_fsub : Intrinsic<[ llvm_anyfloat_ty ],
                                                     [ LLVMMatchType<0>,
                                                       LLVMMatchType<0>,
def int_experimental_constrained_trunc : Intrinsic<[ llvm_anyfloat_ty ],
                                                        llvm_metadata_ty,
                                                        llvm_metadata_ty ]>;
 }
 // FIXME: Add intrinsics for fcmp, fptoui and fptosi.
 
 //===------------------------- Expect Intrinsics --------------------------===//
 //
 def int_expect : Intrinsic<[llvm_anyint_ty],
-  [LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem]>;
+  [LLVMMatchType<0>, LLVMMatchType<0>], [IntrNoMem, IntrWillReturn]>;
 
 //===-------------------- Bit Manipulation Intrinsics ---------------------===//
 //
 
 // None of these intrinsics accesses memory at all.
-let IntrProperties = [IntrNoMem, IntrSpeculatable] in {
+let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_bswap: Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
   def int_ctpop: Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
   def int_bitreverse : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>]>;
   def int_fshl : Intrinsic<[llvm_anyint_ty],
       [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>]>;
   def int_fshr : Intrinsic<[llvm_anyint_ty],
       [LLVMMatchType<0>, LLVMMatchType<0>, LLVMMatchType<0>]>;
 }
 
-let IntrProperties = [IntrNoMem, IntrSpeculatable, ImmArg<1>] in {
+let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn, ImmArg<1>] in {
   def int_ctlz : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>, llvm_i1_ty]>;
   def int_cttz : Intrinsic<[llvm_anyint_ty], [LLVMMatchType<0>, llvm_i1_ty]>;
 }
 
 //===------------------------ Debugger Intrinsics -------------------------===//
 //
 
 // None of these intrinsics accesses memory at all...but that doesn't
 // mean the optimizers can change them aggressively.  Special handling
 // needed in a few places. These synthetic intrinsics have no
 // side-effects and just mark information about their operands.
-let IntrProperties = [IntrNoMem, IntrSpeculatable] in {
+let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_dbg_declare      : Intrinsic<[],
                                        [llvm_metadata_ty,
                                         llvm_metadata_ty,
                                         llvm_metadata_ty]>;
   def int_dbg_value        : Intrinsic<[],
                                        [llvm_metadata_ty,
                                         llvm_metadata_ty,
                                         llvm_metadata_ty]>;
   def int_dbg_addr         : Intrinsic<[],
                                        [llvm_metadata_ty,
                                         llvm_metadata_ty,
                                         llvm_metadata_ty]>;
   def int_dbg_label        : Intrinsic<[],
                                        [llvm_metadata_ty]>;
 }
 
 //===------------------ Exception Handling Intrinsics----------------------===//
 //
 
 // The result of eh.typeid.for depends on the enclosing function, but inside a
 // given function it is 'const' and may be CSE'd etc.
 def int_eh_typeid_for : Intrinsic<[llvm_i32_ty], [llvm_ptr_ty], [IntrNoMem]>;
 

 def int_eh_sjlj_longjmp         : Intrinsic<[], [llvm_ptr_ty], [IntrNoReturn]>;
 def int_eh_sjlj_setup_dispatch  : Intrinsic<[], []>;
 
 //===---------------- Generic Variable Attribute Intrinsics----------------===//
 //
 def int_var_annotation : Intrinsic<[],
                                    [llvm_ptr_ty, llvm_ptr_ty,
                                     llvm_ptr_ty, llvm_i32_ty],
-                                   [], "llvm.var.annotation">;
+                                   [IntrWillReturn], "llvm.var.annotation">;
 def int_ptr_annotation : Intrinsic<[LLVMAnyPointerType<llvm_anyint_ty>],
                                    [LLVMMatchType<0>, llvm_ptr_ty, llvm_ptr_ty,
                                     llvm_i32_ty],
-                                   [], "llvm.ptr.annotation">;
+                                   [IntrWillReturn], "llvm.ptr.annotation">;
 def int_annotation : Intrinsic<[llvm_anyint_ty],
                                [LLVMMatchType<0>, llvm_ptr_ty,
                                 llvm_ptr_ty, llvm_i32_ty],
-                               [], "llvm.annotation">;
+                               [IntrWillReturn], "llvm.annotation">;
 
 // Annotates the current program point with metadata strings which are emitted
 // as CodeView debug info records. This is expensive, as it disables inlining
 // and is modelled as having side effects.
 def int_codeview_annotation : Intrinsic<[], [llvm_metadata_ty],
-                                        [IntrInaccessibleMemOnly, IntrNoDuplicate],
+                                        [IntrInaccessibleMemOnly, IntrNoDuplicate, IntrWillReturn],
                                         "llvm.codeview.annotation">;
 
 //===------------------------ Trampoline Intrinsics -----------------------===//
 //
 def int_init_trampoline : Intrinsic<[],
                                     [llvm_ptr_ty, llvm_ptr_ty, llvm_ptr_ty],
                                     [IntrArgMemOnly, NoCapture<0>]>,
                                    GCCBuiltin<"__builtin_init_trampoline">;
 
 def int_adjust_trampoline : Intrinsic<[llvm_ptr_ty], [llvm_ptr_ty],
                                       [IntrReadMem, IntrArgMemOnly]>,
                                      GCCBuiltin<"__builtin_adjust_trampoline">;
 
 //===------------------------ Overflow Intrinsics -------------------------===//
 //
 
 // Expose the carry flag from add operations on two integrals.
+let IntrProperties = [IntrNoMem, IntrSpeculatable, IntrWillReturn] in {
   def int_sadd_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
   def int_uadd_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
 
   def int_ssub_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
   def int_usub_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
 
   def int_smul_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
   def int_umul_with_overflow : Intrinsic<[llvm_anyint_ty,
                                           LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                       [LLVMMatchType<0>, LLVMMatchType<0>],
-                                       [IntrNoMem, IntrSpeculatable]>;
-
+                                         [LLVMMatchType<0>, LLVMMatchType<0>]>;
+}
 //===------------------------- Saturation Arithmetic Intrinsics ---------------------===//
 //
 def int_sadd_sat : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>],
-                             [IntrNoMem, IntrSpeculatable, Commutative]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]>;
 def int_uadd_sat : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>],
-                             [IntrNoMem, IntrSpeculatable, Commutative]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative]>;
 def int_ssub_sat : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>],
-                             [IntrNoMem, IntrSpeculatable]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn]>;
 def int_usub_sat : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>],
-                             [IntrNoMem, IntrSpeculatable]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn]>;
 
 //===------------------------- Fixed Point Arithmetic Intrinsics ---------------------===//
 //
 def int_smul_fix : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>, llvm_i32_ty],
-                             [IntrNoMem, IntrSpeculatable, Commutative, ImmArg<2>]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative, ImmArg<2>]>;
 
 def int_umul_fix : Intrinsic<[llvm_anyint_ty],
                              [LLVMMatchType<0>, LLVMMatchType<0>, llvm_i32_ty],
-                             [IntrNoMem, IntrSpeculatable, Commutative, ImmArg<2>]>;
+                             [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative, ImmArg<2>]>;
 
 //===------------------- Fixed Point Saturation Arithmetic Intrinsics ----------------===//
 //
 def int_smul_fix_sat : Intrinsic<[llvm_anyint_ty],
                                  [LLVMMatchType<0>, LLVMMatchType<0>, llvm_i32_ty],
-                                 [IntrNoMem, IntrSpeculatable, Commutative, ImmArg<2>]>;
+                                 [IntrNoMem, IntrSpeculatable, IntrWillReturn, Commutative, ImmArg<2>]>;
 
 //===------------------------- Memory Use Markers -------------------------===//
 //
 def int_lifetime_start  : Intrinsic<[],
                                     [llvm_i64_ty, llvm_anyptr_ty],
-                                    [IntrArgMemOnly, NoCapture<1>, ImmArg<0>]>;
+                                    [IntrArgMemOnly, IntrWillReturn, NoCapture<1>, ImmArg<0>]>;
 def int_lifetime_end    : Intrinsic<[],
                                     [llvm_i64_ty, llvm_anyptr_ty],
-                                    [IntrArgMemOnly, NoCapture<1>, ImmArg<0>]>;
+                                    [IntrArgMemOnly, IntrWillReturn, NoCapture<1>, ImmArg<0>]>;
 def int_invariant_start : Intrinsic<[llvm_descriptor_ty],
                                     [llvm_i64_ty, llvm_anyptr_ty],
-                                    [IntrArgMemOnly, NoCapture<1>, ImmArg<0>]>;
+                                    [IntrArgMemOnly, IntrWillReturn, NoCapture<1>, ImmArg<0>]>;
 def int_invariant_end   : Intrinsic<[],
                                     [llvm_descriptor_ty, llvm_i64_ty,
                                      llvm_anyptr_ty],
-                                    [IntrArgMemOnly, NoCapture<2>, ImmArg<1>]>;
+                                    [IntrArgMemOnly, IntrWillReturn, NoCapture<2>, ImmArg<1>]>;
 
 // launder.invariant.group can't be marked with 'readnone' (IntrNoMem),
 // because it would cause CSE of two barriers with the same argument.
 // Inaccessiblememonly says that the barrier doesn't read the argument,
 // but it changes state not accessible to this module. This way
 // we can DSE through the barrier because it doesn't read the value
 // after store. Although the barrier doesn't modify any memory it
 // can't be marked as readonly, because it would be possible to
 // CSE 2 barriers with store in between.
 // The argument also can't be marked with 'returned' attribute, because
 // it would remove barrier.
 // Note that it is still experimental, which means that its semantics
 // might change in the future.
 def int_launder_invariant_group : Intrinsic<[llvm_anyptr_ty],
                                             [LLVMMatchType<0>],
-                                            [IntrInaccessibleMemOnly, IntrSpeculatable]>;
+                                            [IntrInaccessibleMemOnly, IntrSpeculatable, IntrWillReturn]>;
 
 
 def int_strip_invariant_group : Intrinsic<[llvm_anyptr_ty],
                                           [LLVMMatchType<0>],
-                                          [IntrSpeculatable, IntrNoMem]>;
+                                          [IntrSpeculatable, IntrNoMem, IntrWillReturn]>;
 
 //===------------------------ Stackmap Intrinsics -------------------------===//
 //
 def int_experimental_stackmap : Intrinsic<[],
                                   [llvm_i64_ty, llvm_i32_ty, llvm_vararg_ty],
                                   [Throws]>;
 def int_experimental_patchpoint_void : Intrinsic<[],
                                                  [llvm_i64_ty, llvm_i32_ty,

 def int_experimental_guard : Intrinsic<[], [llvm_i1_ty, llvm_vararg_ty],
                                        [Throws]>;
 
 // Supports widenable conditions for guards represented as explicit branches.
 def int_experimental_widenable_condition : Intrinsic<[llvm_i1_ty], [],
                                            [IntrInaccessibleMemOnly]>;
 
 // NOP: calls/invokes to this intrinsic are removed by codegen
-def int_donothing : Intrinsic<[], [], [IntrNoMem]>;
+def int_donothing : Intrinsic<[], [], [IntrNoMem, IntrWillReturn]>;
 
 // This instruction has no actual effect, though it is treated by the optimizer
 // has having opaque side effects. This may be inserted into loops to ensure
 // that they are not removed even if they turn out to be empty, for languages
 // which specify that infinite loops must be preserved.
 def int_sideeffect : Intrinsic<[], [], [IntrInaccessibleMemOnly]>;
 
 // Intrisics to support half precision floating point format
-let IntrProperties = [IntrNoMem] in {
+let IntrProperties = [IntrNoMem, IntrWillReturn] in {
 def int_convert_to_fp16   : Intrinsic<[llvm_i16_ty], [llvm_anyfloat_ty]>;
 def int_convert_from_fp16 : Intrinsic<[llvm_anyfloat_ty], [llvm_i16_ty]>;
 }
 
 // Clear cache intrinsic, default to ignore (ie. emit nothing)
 // maps to void __clear_cache() on supporting platforms
 def int_clear_cache : Intrinsic<[], [llvm_ptr_ty, llvm_ptr_ty],
                                 [], "llvm.clear_cache">;
 
 // Intrinsic to detect whether its argument is a constant.
-def int_is_constant : Intrinsic<[llvm_i1_ty], [llvm_any_ty], [IntrNoMem], "llvm.is.constant">;
+def int_is_constant : Intrinsic<[llvm_i1_ty], [llvm_any_ty], [IntrNoMem, IntrWillReturn], "llvm.is.constant">;
 
 //===-------------------------- Masked Intrinsics -------------------------===//
 //
 def int_masked_store : Intrinsic<[], [llvm_anyvector_ty,
                                       LLVMAnyPointerType<LLVMMatchType<0>>,
                                       llvm_i32_ty,
                                       LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                 [IntrArgMemOnly, ImmArg<2>]>;
+                                 [IntrArgMemOnly, IntrWillReturn, ImmArg<2>]>;
 
 def int_masked_load  : Intrinsic<[llvm_anyvector_ty],
                                  [LLVMAnyPointerType<LLVMMatchType<0>>, llvm_i32_ty,
                                   LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>, LLVMMatchType<0>],
-                                 [IntrReadMem, IntrArgMemOnly, ImmArg<1>]>;
+                                 [IntrReadMem, IntrArgMemOnly, IntrWillReturn, ImmArg<1>]>;
 
 def int_masked_gather: Intrinsic<[llvm_anyvector_ty],
                                  [LLVMVectorOfAnyPointersToElt<0>, llvm_i32_ty,
                                   LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>,
                                   LLVMMatchType<0>],
-                                 [IntrReadMem, ImmArg<1>]>;
+                                 [IntrReadMem, IntrWillReturn, ImmArg<1>]>;
 
 def int_masked_scatter: Intrinsic<[],
                                   [llvm_anyvector_ty,
                                    LLVMVectorOfAnyPointersToElt<0>, llvm_i32_ty,
                                    LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                   [ImmArg<2>]>;
+                                   [IntrWillReturn, ImmArg<2>]>;
 
 def int_masked_expandload: Intrinsic<[llvm_anyvector_ty],
                                      [LLVMPointerToElt<0>,
                                       LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>,
                                       LLVMMatchType<0>],
-                                     [IntrReadMem]>;
+                                     [IntrReadMem, IntrWillReturn]>;
 
 def int_masked_compressstore: Intrinsic<[],
                                      [llvm_anyvector_ty,
                                       LLVMPointerToElt<0>,
                                       LLVMScalarOrSameVectorWidth<0, llvm_i1_ty>],
-                                     [IntrArgMemOnly]>;
+                                     [IntrArgMemOnly, IntrWillReturn]>;
 
 // Test whether a pointer is associated with a type metadata identifier.
 def int_type_test : Intrinsic<[llvm_i1_ty], [llvm_ptr_ty, llvm_metadata_ty],
-                              [IntrNoMem]>;
+                              [IntrNoMem, IntrWillReturn]>;
 
 // Safely loads a function pointer from a virtual table pointer using type metadata.
 def int_type_checked_load : Intrinsic<[llvm_ptr_ty, llvm_i1_ty],
                                       [llvm_ptr_ty, llvm_i32_ty, llvm_metadata_ty],
-                                      [IntrNoMem]>;
+                                      [IntrNoMem, IntrWillReturn]>;
 
 // Create a branch funnel that implements an indirect call to a limited set of
 // callees. This needs to be a musttail call.
 def int_icall_branch_funnel : Intrinsic<[], [llvm_vararg_ty], []>;
 
 def int_load_relative: Intrinsic<[llvm_ptr_ty], [llvm_ptr_ty, llvm_anyint_ty],
                                  [IntrReadMem, IntrArgMemOnly]>;
 

 
 // @llvm.memcpy.element.unordered.atomic.*(dest, src, length, elementsize)
 def int_memcpy_element_unordered_atomic
     : Intrinsic<[],
                 [
                   llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty, llvm_i32_ty
                 ],
                 [
-                  IntrArgMemOnly, NoCapture<0>, NoCapture<1>, WriteOnly<0>,
+                  IntrArgMemOnly, IntrWillReturn, NoCapture<0>, NoCapture<1>, WriteOnly<0>,
                   ReadOnly<1>, ImmArg<3>
                 ]>;
 
 // @llvm.memmove.element.unordered.atomic.*(dest, src, length, elementsize)
 def int_memmove_element_unordered_atomic
     : Intrinsic<[],
                 [
                   llvm_anyptr_ty, llvm_anyptr_ty, llvm_anyint_ty, llvm_i32_ty
                 ],
                 [
-                  IntrArgMemOnly, NoCapture<0>, NoCapture<1>, WriteOnly<0>,
+                  IntrArgMemOnly, IntrWillReturn, NoCapture<0>, NoCapture<1>, WriteOnly<0>,
                   ReadOnly<1>, ImmArg<3>
                 ]>;
 
 // @llvm.memset.element.unordered.atomic.*(dest, value, length, elementsize)
 def int_memset_element_unordered_atomic
     : Intrinsic<[], [ llvm_anyptr_ty, llvm_i8_ty, llvm_anyint_ty, llvm_i32_ty ],
-                [ IntrArgMemOnly, NoCapture<0>, WriteOnly<0>, ImmArg<3> ]>;
+                [ IntrArgMemOnly, IntrWillReturn, NoCapture<0>, WriteOnly<0>, ImmArg<3> ]>;
 
 //===------------------------ Reduction Intrinsics ------------------------===//
 //
+let IntrProperties = [IntrNoMem, IntrWillReturn] in {
   def int_experimental_vector_reduce_v2_fadd : Intrinsic<[llvm_anyfloat_ty],
                                                          [LLVMMatchType<0>,
-                                                        llvm_anyvector_ty],
-                                                       [IntrNoMem]>;
+                                                          llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_v2_fmul : Intrinsic<[llvm_anyfloat_ty],
                                                          [LLVMMatchType<0>,
-                                                        llvm_anyvector_ty],
-                                                       [IntrNoMem]>;
+                                                          llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_add : Intrinsic<[LLVMVectorElementType<0>],
-                                                   [llvm_anyvector_ty],
-                                                   [IntrNoMem]>;
+                                                     [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_mul : Intrinsic<[LLVMVectorElementType<0>],
-                                                   [llvm_anyvector_ty],
-                                                   [IntrNoMem]>;
+                                                     [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_and : Intrinsic<[LLVMVectorElementType<0>],
-                                                   [llvm_anyvector_ty],
-                                                   [IntrNoMem]>;
+                                                     [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_or : Intrinsic<[LLVMVectorElementType<0>],
-                                                  [llvm_anyvector_ty],
-                                                  [IntrNoMem]>;
+                                                    [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_xor : Intrinsic<[LLVMVectorElementType<0>],
-                                                   [llvm_anyvector_ty],
-                                                   [IntrNoMem]>;
+                                                     [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_smax : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_smin : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_umax : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_umin : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_fmax : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
   def int_experimental_vector_reduce_fmin : Intrinsic<[LLVMVectorElementType<0>],
-                                                    [llvm_anyvector_ty],
-                                                    [IntrNoMem]>;
+                                                      [llvm_anyvector_ty]>;
+}
 
 //===---------- Intrinsics to control hardware supported loops ----------===//
 
 // Specify that the value given is the number of iterations that the next loop
 // will execute.
 def int_set_loop_iterations :
   Intrinsic<[], [llvm_anyint_ty], [IntrNoDuplicate]>;
 

llvm/test/Analysis/BasicAA/cs-cs.ll

 entry:
   %q = getelementptr i8, i8* %p, i64 16
   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
   ret void
 
-; CHECK: Just Ref:  Ptr: i8* %p        <->  call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
-; CHECK: Just Ref:  Ptr: i8* %q        <->  call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
-; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
-; CHECK: NoModRef:  Ptr: i8* %q        <->  call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
-; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
-; CHECK: Both ModRef (MustAlias):  Ptr: i8* %q     <->  call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
-; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
-; CHECK: Both ModRef (MustAlias):  Ptr: i8* %q     <->  call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
-; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
-; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
-; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
-; CHECK: Both ModRef:   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
-; CHECK: Both ModRef:   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
-; CHECK: NoModRef:   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
-; CHECK: Both ModRef:   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
-; CHECK: Both ModRef:   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
-; CHECK: Both ModRef (MustAlias):   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ]
-; CHECK: Both ModRef:   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #6 [ "unknown"() ]
-; CHECK: NoModRef:   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #7 [ "unknown"() ]
-; CHECK: Both ModRef (MustAlias):   call void @an_argmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #8 [ "unknown"() ]
+; CHECK: Just Ref:  Ptr: i8* %p        <->  call void @a_readonly_func(i8* %p) #7 [ "unknown"() ]
+; CHECK: Just Ref:  Ptr: i8* %q        <->  call void @a_readonly_func(i8* %p) #7 [ "unknown"() ]
+; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_inaccessiblememonly_func() #8 [ "unknown"() ]
+; CHECK: NoModRef:  Ptr: i8* %q        <->  call void @an_inaccessiblememonly_func() #8 [ "unknown"() ]
+; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Both ModRef (MustAlias):  Ptr: i8* %q     <->  call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: NoModRef:  Ptr: i8* %p        <->  call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ]
+; CHECK: Both ModRef (MustAlias):  Ptr: i8* %q     <->  call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ]
+; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ]
+; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: Just Ref:   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ]
+; CHECK: Both ModRef:   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ]
+; CHECK: Both ModRef:   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ]
+; CHECK: NoModRef:   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ]
+; CHECK: Both ModRef:   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ]
+; CHECK: Both ModRef:   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ]
+; CHECK: Both ModRef (MustAlias):   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ] <->   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ]
+; CHECK: Both ModRef:   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ] <->   call void @a_readonly_func(i8* %p) #7 [ "unknown"() ]
+; CHECK: NoModRef:   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ] <->   call void @an_inaccessiblememonly_func() #8 [ "unknown"() ]
+; CHECK: Both ModRef (MustAlias):   call void @an_argmemonly_func(i8* %q) #10 [ "unknown"() ] <->   call void @an_inaccessibleorargmemonly_func(i8* %q) #9 [ "unknown"() ]
 }
 
 attributes #0 = { argmemonly nounwind }
 attributes #1 = { noinline nounwind readonly }
 attributes #2 = { noinline nounwind writeonly }
 attributes #3 = { nounwind ssp }
 attributes #4 = { inaccessiblememonly nounwind }
 attributes #5 = { inaccessiblemem_or_argmemonly nounwind }
 attributes #6 = { readonly }
 attributes #7 = { inaccessiblememonly }
 attributes #8 = { inaccessiblemem_or_argmemonly }
 attributes #9 = { argmemonly }

llvm/test/Analysis/BasicAA/intrinsics.ll

entry:
   %b = call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %p, i32 16, <8 x i1> %m, <8 x i16> %pt) nounwind
   %c = add <8 x i16> %a, %b
   ret <8 x i16> %c
 }
 
 declare <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>*, i32, <8 x i1>, <8 x i16>) nounwind readonly
 declare void @llvm.masked.store.v8i16.p0v8i16(<8 x i16>, <8 x i16>*, i32, <8 x i1>) nounwind
 
-; CHECK: attributes #0 = { argmemonly nounwind readonly }
-; CHECK: attributes #1 = { argmemonly nounwind }
+; CHECK: attributes #0 = { argmemonly nounwind readonly willreturn }
+; CHECK: attributes #1 = { argmemonly nounwind willreturn }
 ; CHECK: attributes [[ATTR]] = { nounwind }

llvm/test/Analysis/TypeBasedAliasAnalysis/functionattrs.ll

 declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i1) nounwind
 
 ; CHECK: attributes #0 = { norecurse nounwind readnone }
 ; CHECK: attributes #1 = { nofree norecurse nounwind writeonly }
 ; CHECK: attributes #2 = { nounwind readonly }
 ; CHECK: attributes #3 = { nounwind }
 ; CHECK: attributes #4 = { nounwind readnone }
 ; CHECK: attributes #5 = { nofree norecurse nounwind }
-; CHECK: attributes #6 = { argmemonly nounwind }
+; CHECK: attributes #6 = { argmemonly nounwind willreturn }
 
 ; Root note.
 !0 = !{ }
 
 ; Invariant memory.
 !1 = !{!3, !3, i64 0, i1 1 }
 ; Not invariant memory.
 !2 = !{!3, !3, i64 0, i1 0 }
 !3 = !{ !"foo", !0 }

llvm/test/Analysis/TypeBasedAliasAnalysis/intrinsics.ll

entry:
   %b = call <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>* %p, i32 16, <8 x i1> %m, <8 x i16> %pt) nounwind, !tbaa !2
   %c = add <8 x i16> %a, %b
   ret <8 x i16> %c
 }
 
 declare <8 x i16> @llvm.masked.load.v8i16.p0v8i16(<8 x i16>*, i32, <8 x i1>, <8 x i16>) nounwind readonly
 declare void @llvm.masked.store.v8i16.p0v8i16(<8 x i16>, <8 x i16>*, i32, <8 x i1>) nounwind
 
-; CHECK: attributes #0 = { argmemonly nounwind readonly }
-; CHECK: attributes #1 = { argmemonly nounwind }
+; CHECK: attributes #0 = { argmemonly nounwind readonly willreturn }
+; CHECK: attributes #1 = { argmemonly nounwind willreturn }
 ; CHECK: attributes [[NUW]] = { nounwind }
 
 !0 = !{!"tbaa root"}
 !1 = !{!3, !3, i64 0}
 !2 = !{!4, !4, i64 0}
 !3 = !{!"A", !0}
 !4 = !{!"B", !0}

llvm/test/Bindings/llvm-c/debug_info.ll

 ; CHECK-NEXT: }
 
 ; CHECK:      ; Function Attrs: nounwind readnone speculatable
 ; CHECK-NEXT: declare void @llvm.dbg.declare(metadata, metadata, metadata) #0
 
 ; CHECK:      ; Function Attrs: nounwind readnone speculatable
 ; CHECK-NEXT: declare void @llvm.dbg.value(metadata, metadata, metadata) #0
 
-; CHECK:      attributes #0 = { nounwind readnone speculatable }
+; CHECK:      attributes #0 = { nounwind readnone speculatable willreturn }
 
 ; CHECK:      !llvm.dbg.cu = !{!0}
 ; CHECK-NEXT: !FooType = !{!16}
 
 ; CHECK:      !0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "llvm-c-test", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, imports: !12, splitDebugInlining: false)
 ; CHECK-NEXT: !1 = !DIFile(filename: "debuginfo.c", directory: ".")
 ; CHECK-NEXT: !2 = !{}
 ; CHECK-NEXT: !3 = !{!4, !8}

llvm/test/Bitcode/compatibility-3.6.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #34
+  ; CHECK: call void @f.nobuiltin() #35
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #11
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #6
 
   ret void
 }

 ; CHECK: attributes #21 = { sanitize_address }
 ; CHECK: attributes #22 = { sanitize_memory }
 ; CHECK: attributes #23 = { sanitize_thread }
 ; CHECK: attributes #24 = { ssp }
 ; CHECK: attributes #25 = { sspreq }
 ; CHECK: attributes #26 = { sspstrong }
 ; CHECK: attributes #27 = { uwtable }
 ; CHECK: attributes #28 = { "cpu"="cortex-a8" }
-; CHECK: attributes #29 = { nounwind readnone }
+; CHECK: attributes #29 = { nounwind readnone willreturn }
 ; CHECK: attributes #30 = { argmemonly nounwind readonly }
 ; CHECK: attributes #31 = { argmemonly nounwind }
-; CHECK: attributes #32 = { nounwind readonly }
-; CHECK: attributes #33 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #34 = { builtin }
+; CHECK: attributes #32 = { nounwind readnone }
+; CHECK: attributes #33 = { nounwind readonly }
+; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly nounwind willreturn }
+; CHECK: attributes #35 = { builtin }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-3.7.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #37
+  ; CHECK: call void @f.nobuiltin() #38
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }

 ; CHECK: attributes #24 = { sanitize_memory }
 ; CHECK: attributes #25 = { sanitize_thread }
 ; CHECK: attributes #26 = { ssp }
 ; CHECK: attributes #27 = { sspreq }
 ; CHECK: attributes #28 = { sspstrong }
 ; CHECK: attributes #29 = { "thunk" }
 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
-; CHECK: attributes #32 = { nounwind readnone }
+; CHECK: attributes #32 = { nounwind readnone willreturn }
 ; CHECK: attributes #33 = { argmemonly nounwind readonly }
 ; CHECK: attributes #34 = { argmemonly nounwind }
-; CHECK: attributes #35 = { nounwind readonly }
-; CHECK: attributes #36 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #37 = { builtin }
+; CHECK: attributes #35 = { nounwind readnone }
+; CHECK: attributes #36 = { nounwind readonly }
+; CHECK: attributes #37 = { inaccessiblemem_or_argmemonly nounwind willreturn }
+; CHECK: attributes #38 = { builtin }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-3.8.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #40
+  ; CHECK: call void @f.nobuiltin() #41
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }

 ; CHECK: attributes #27 = { sspreq }
 ; CHECK: attributes #28 = { sspstrong }
 ; CHECK: attributes #29 = { "thunk" }
 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
-; CHECK: attributes #35 = { nounwind readnone }
+; CHECK: attributes #35 = { nounwind readnone willreturn }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #40 = { builtin }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { inaccessiblemem_or_argmemonly nounwind willreturn }
+; CHECK: attributes #41 = { builtin }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-3.9.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #41
+  ; CHECK: call void @f.nobuiltin() #42
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }

 exception:
   %cleanup = landingpad i8 cleanup
   br label %normal
 normal:
   ret void
 }
 
 declare void @f.writeonly() writeonly
-; CHECK: declare void @f.writeonly() #39
+; CHECK: declare void @f.writeonly() #40
 
 ; CHECK: attributes #0 = { alignstack=4 }
 ; CHECK: attributes #1 = { alignstack=8 }
 ; CHECK: attributes #2 = { alwaysinline }
 ; CHECK: attributes #3 = { cold }
 ; CHECK: attributes #4 = { convergent }
 ; CHECK: attributes #5 = { inlinehint }
 ; CHECK: attributes #6 = { jumptable }

 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
 ; CHECK: attributes #35 = { nounwind readnone }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { writeonly }
-; CHECK: attributes #40 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #41 = { builtin }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { writeonly }
+; CHECK: attributes #41 = { inaccessiblemem_or_argmemonly nounwind }
+; CHECK: attributes #42 = { builtin }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-4.0.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #41
+  ; CHECK: call void @f.nobuiltin() #42
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }
exception:
   %cleanup = landingpad i8 cleanup
   br label %normal
 normal:
   ret void
 }
 
 
 declare void @f.writeonly() writeonly
-; CHECK: declare void @f.writeonly() #39
+; CHECK: declare void @f.writeonly() #40
 
 ;; Constant Expressions
 
 define i8** @constexpr() {
   ; CHECK: ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
   ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
 }
 

 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
 ; CHECK: attributes #35 = { nounwind readnone }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { writeonly }
-; CHECK: attributes #40 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #41 = { builtin }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { writeonly }
+; CHECK: attributes #41 = { inaccessiblemem_or_argmemonly nounwind }
+; CHECK: attributes #42 = { builtin }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-5.0.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #42
+  ; CHECK: call void @f.nobuiltin() #43
 
   call void @f.strictfp() strictfp
-  ; CHECK: call void @f.strictfp() #43
+  ; CHECK: call void @f.strictfp() #44
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }
exception:
   %cleanup = landingpad i8 cleanup
   br label %normal
 normal:
   ret void
 }
 
 
 declare void @f.writeonly() writeonly
-; CHECK: declare void @f.writeonly() #39
+; CHECK: declare void @f.writeonly() #40
 
 declare void @f.speculatable() speculatable
-; CHECK: declare void @f.speculatable() #40
+; CHECK: declare void @f.speculatable() #41
 
 ;; Constant Expressions
 
 define i8** @constexpr() {
   ; CHECK: ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
   ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
 }
 

 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
 ; CHECK: attributes #35 = { nounwind readnone }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { writeonly }
-; CHECK: attributes #40 = { speculatable }
-; CHECK: attributes #41 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #42 = { builtin }
-; CHECK: attributes #43 = { strictfp }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { writeonly }
+; CHECK: attributes #41 = { speculatable }
+; CHECK: attributes #42 = { inaccessiblemem_or_argmemonly nounwind }
+; CHECK: attributes #43 = { builtin }
+; CHECK: attributes #44 = { strictfp }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility-6.0.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #42
+  ; CHECK: call void @f.nobuiltin() #43
 
   call void @f.strictfp() strictfp
-  ; CHECK: call void @f.strictfp() #43
+  ; CHECK: call void @f.strictfp() #44
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }
exception:
   %cleanup = landingpad i8 cleanup
   br label %normal
 normal:
   ret void
 }
 
 
 declare void @f.writeonly() writeonly
-; CHECK: declare void @f.writeonly() #39
+; CHECK: declare void @f.writeonly() #40
 
 declare void @f.speculatable() speculatable
-; CHECK: declare void @f.speculatable() #40
+; CHECK: declare void @f.speculatable() #41
 
 ;; Constant Expressions
 
 define i8** @constexpr() {
   ; CHECK: ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
   ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
 }
 

 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
 ; CHECK: attributes #35 = { nounwind readnone }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { writeonly }
-; CHECK: attributes #40 = { speculatable }
-; CHECK: attributes #41 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #42 = { builtin }
-; CHECK: attributes #43 = { strictfp }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { writeonly }
+; CHECK: attributes #41 = { speculatable }
+; CHECK: attributes #42 = { inaccessiblemem_or_argmemonly nounwind }
+; CHECK: attributes #43 = { builtin }
+; CHECK: attributes #44 = { strictfp }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/Bitcode/compatibility.ll

exit:
   ; CHECK: phi i32 [ %v1, %L1 ], [ %v2, %L2 ], [ %op1, %entry ]
 
   select i1 true, i32 0, i32 1
   ; CHECK: select i1 true, i32 0, i32 1
   select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
   ; CHECK: select <2 x i1> <i1 true, i1 false>, <2 x i8> <i8 2, i8 3>, <2 x i8> <i8 3, i8 2>
 
   call void @f.nobuiltin() builtin
-  ; CHECK: call void @f.nobuiltin() #42
+  ; CHECK: call void @f.nobuiltin() #43
 
   call void @f.strictfp() strictfp
-  ; CHECK: call void @f.strictfp() #43
+  ; CHECK: call void @f.strictfp() #44
 
   call fastcc noalias i32* @f.noalias() noinline
   ; CHECK: call fastcc noalias i32* @f.noalias() #12
   tail call ghccc nonnull i32* @f.nonnull() minsize
   ; CHECK: tail call ghccc nonnull i32* @f.nonnull() #7
 
   ret void
 }
exception:
   %cleanup = landingpad i8 cleanup
   br label %normal
 normal:
   ret void
 }
 
 
 declare void @f.writeonly() writeonly
-; CHECK: declare void @f.writeonly() #40
+; CHECK: declare void @f.writeonly() #41
 
 declare void @f.speculatable() speculatable
-; CHECK: declare void @f.speculatable() #41
+; CHECK: declare void @f.speculatable() #42
 
 ;; Constant Expressions
 
 define i8** @constexpr() {
   ; CHECK: ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
   ret i8** getelementptr inbounds ({ [4 x i8*], [4 x i8*] }, { [4 x i8*], [4 x i8*] }* null, i32 0, inrange i32 1, i32 2)
 }
 

 ; CHECK: attributes #27 = { sspreq }
 ; CHECK: attributes #28 = { sspstrong }
 ; CHECK: attributes #29 = { "thunk" }
 ; CHECK: attributes #30 = { uwtable }
 ; CHECK: attributes #31 = { "cpu"="cortex-a8" }
 ; CHECK: attributes #32 = { norecurse }
 ; CHECK: attributes #33 = { inaccessiblememonly }
 ; CHECK: attributes #34 = { inaccessiblemem_or_argmemonly }
-; CHECK: attributes #35 = { nounwind readnone }
+; CHECK: attributes #35 = { nounwind readnone willreturn }
 ; CHECK: attributes #36 = { argmemonly nounwind readonly }
 ; CHECK: attributes #37 = { argmemonly nounwind }
-; CHECK: attributes #38 = { nounwind readonly }
-; CHECK: attributes #39 = { inaccessiblemem_or_argmemonly nounwind }
-; CHECK: attributes #40 = { writeonly }
-; CHECK: attributes #41 = { speculatable }
-; CHECK: attributes #42 = { builtin }
-; CHECK: attributes #43 = { strictfp }
+; CHECK: attributes #38 = { nounwind readnone }
+; CHECK: attributes #39 = { nounwind readonly }
+; CHECK: attributes #40 = { inaccessiblemem_or_argmemonly nounwind willreturn }
+; CHECK: attributes #41 = { writeonly }
+; CHECK: attributes #42 = { speculatable }
+; CHECK: attributes #43 = { builtin }
+; CHECK: attributes #44 = { strictfp }
 
 ;; Metadata
 
 ; Metadata -- Module flags
 !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 ; CHECK: !llvm.module.flags = !{!0, !1, !2, !4, !5, !6}
 
 !0 = !{i32 1, !"mod1", i32 0}

llvm/test/CodeGen/AMDGPU/addrspacecast-constantexpr.ll

define amdgpu_kernel void @store_constant_cast_group_gv_gep_to_flat_to_group() #1 {
   ret void
 }
 
 ; HSA: @ret_constant_cast_group_gv_gep_to_flat_to_group() #2
 define i32 addrspace(3)* @ret_constant_cast_group_gv_gep_to_flat_to_group() #1 {
   ret i32 addrspace(3)* addrspacecast (i32 addrspace(4)* getelementptr ([256 x i32], [256 x i32] addrspace(4)* addrspacecast ([256 x i32] addrspace(3)* @lds.arr to [256 x i32] addrspace(4)*), i64 0, i64 8) to i32 addrspace(3)*)
 }
 
-; HSA: attributes #0 = { argmemonly nounwind }
+; HSA: attributes #0 = { argmemonly nounwind willreturn }
 ; HSA: attributes #1 = { nounwind }
 ; HSA: attributes #2 = { nounwind "amdgpu-queue-ptr" }
 
 attributes #0 = { argmemonly nounwind }
 attributes #1 = { nounwind }

llvm/test/Feature/intrinsics.ll

 ; CHECK: declare void @llvm.trap() #1
 declare void @llvm.trap()
 
 define void @trap() {
   call void @llvm.trap()
   ret void
 }
 
-; CHECK: attributes #0 = { nounwind readnone speculatable }
+; CHECK: attributes #0 = { nounwind readnone speculatable willreturn }
 ; CHECK: attributes #1 = { cold noreturn nounwind }

llvm/test/Other/invariant.group.ll

; CHECK: call void @useBool(i1 %r2)
 
   ret void
 }
 
 declare void @use(i8* readonly)
 declare void @useBool(i1)
 
 declare void @clobber(i8*)
-; CHECK: Function Attrs: inaccessiblememonly nounwind speculatable{{$}}
+; CHECK: Function Attrs: inaccessiblememonly nounwind speculatable willreturn{{$}}
 ; CHECK-NEXT: declare i8* @llvm.launder.invariant.group.p0i8(i8*)
 declare i8* @llvm.launder.invariant.group.p0i8(i8*)
 
-; CHECK: Function Attrs: nounwind readnone speculatable{{$}}
+; CHECK: Function Attrs: nounwind readnone speculatable willreturn{{$}}
 ; CHECK-NEXT: declare i8* @llvm.strip.invariant.group.p0i8(i8*)
 declare i8* @llvm.strip.invariant.group.p0i8(i8*)
 
 
 !0 = !{}
 No newline at end of file

llvm/test/Transforms/DeadArgElim/2010-04-30-DbgInfo.ll

 bb2:                                              ; preds = %bb1, %bb
   %.0 = phi i8* [ getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), %bb ], [ %name, %bb1 ] ; <i8*> [#uses=1]
   ret i8* %.0, !dbg !27
 }
 
 declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
 
 ; CHECK: attributes #0 = { nounwind ssp }
-; CHECK: attributes #1 = { nounwind readnone speculatable }
+; CHECK: attributes #1 = { nounwind readnone speculatable willreturn }
 ; CHECK: attributes #2 = { noinline nounwind ssp }
 ; CHECK: attributes [[NUW]] = { nounwind }
 
 !llvm.dbg.cu = !{!3}
 !llvm.module.flags = !{!30}
 !0 = !DILocalVariable(name: "name", line: 8, arg: 1, scope: !1, file: !2, type: !6)
 !1 = distinct !DISubprogram(name: "vfs_addname", linkageName: "vfs_addname", line: 12, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !3, file: !28, scope: !2, type: !4)
 !2 = !DIFile(filename: "tail.c", directory: "/Users/echeng/LLVM/radars/r7927803/")

llvm/test/Transforms/DeadStoreElimination/simple.ll

 declare noalias i8* @strdup(i8* nocapture) nounwind
 define noalias i8* @test23() nounwind uwtable ssp {
 ; CHECK-LABEL: @test23(
 ; CHECK-NEXT:    [[X:%.*]] = alloca [2 x i8], align 1
 ; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [2 x i8], [2 x i8]* [[X]], i64 0, i64 0
 ; CHECK-NEXT:    store i8 97, i8* [[ARRAYIDX]], align 1
 ; CHECK-NEXT:    [[ARRAYIDX1:%.*]] = getelementptr inbounds [2 x i8], [2 x i8]* [[X]], i64 0, i64 1
 ; CHECK-NEXT:    store i8 0, i8* [[ARRAYIDX1]], align 1
-; CHECK-NEXT:    [[CALL:%.*]] = call i8* @strdup(i8* [[ARRAYIDX]]) #1
+; CHECK-NEXT:    [[CALL:%.*]] = call i8* @strdup(i8* [[ARRAYIDX]]) #2
 ; CHECK-NEXT:    ret i8* [[CALL]]
 ;
   %x = alloca [2 x i8], align 1
   %arrayidx = getelementptr inbounds [2 x i8], [2 x i8]* %x, i64 0, i64 0
   store i8 97, i8* %arrayidx, align 1
   %arrayidx1 = getelementptr inbounds [2 x i8], [2 x i8]* %x, i64 0, i64 1
   store i8 0, i8* %arrayidx1, align 1
   %call = call i8* @strdup(i8* %arrayidx) nounwind

 }
 
 ; Check another case like PR13547 where strdup is not like malloc.
 define i8* @test25(i8* %p) nounwind {
 ; CHECK-LABEL: @test25(
 ; CHECK-NEXT:    [[P_4:%.*]] = getelementptr i8, i8* [[P:%.*]], i64 4
 ; CHECK-NEXT:    [[TMP:%.*]] = load i8, i8* [[P_4]], align 1
 ; CHECK-NEXT:    store i8 0, i8* [[P_4]], align 1
-; CHECK-NEXT:    [[Q:%.*]] = call i8* @strdup(i8* [[P]]) #4
+; CHECK-NEXT:    [[Q:%.*]] = call i8* @strdup(i8* [[P]]) #5
 ; CHECK-NEXT:    store i8 [[TMP]], i8* [[P_4]], align 1
 ; CHECK-NEXT:    ret i8* [[Q]]
 ;
   %p.4 = getelementptr i8, i8* %p, i64 4
   %tmp = load i8, i8* %p.4, align 1
   store i8 0, i8* %p.4, align 1
   %q = call i8* @strdup(i8* %p) nounwind optsize
   store i8 %tmp, i8* %p.4, align 1

llvm/test/Transforms/Inline/inline_invoke.ll

 ; CHECK:    [[FIX]]:
 ; CHECK-NEXT: [[T1:%.*]] = phi i32 [ 0, %[[JOIN]] ], [ 1, %lpad ]
 ; CHECK-NEXT: call void @use(i32 [[T1]])
 ; CHECK-NEXT: call void @_ZSt9terminatev()
 
 ; CHECK: attributes [[NUW]] = { nounwind }
 ; CHECK: attributes #1 = { nounwind readnone }
 ; CHECK: attributes #2 = { ssp uwtable }
-; CHECK: attributes #3 = { argmemonly nounwind }
+; CHECK: attributes #3 = { argmemonly nounwind willreturn }
 ; CHECK: attributes #4 = { noreturn nounwind }

llvm/test/Transforms/Inline/noalias-calls.ll

 ; CHECK:   call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 %a, i8* align 16 %b, i64 16, i1 false) #1, !noalias !0
 ; CHECK:   call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 %b, i8* align 16 %c, i64 16, i1 false) #1, !noalias !3
 ; CHECK:   call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 %a, i8* align 16 %c, i64 16, i1 false) #1, !alias.scope !5
 ; CHECK:   call void @hey() #1, !noalias !5
 ; CHECK:   call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 %{{.*}}, i8* align 16 %c, i64 16, i1 false) #1, !noalias !3
 ; CHECK:   ret void
 ; CHECK: }
 
-attributes #0 = { nounwind argmemonly }
+attributes #0 = { nounwind argmemonly willreturn }
 attributes #1 = { nounwind }
 attributes #2 = { nounwind uwtable }
 
 ; CHECK: !0 = !{!1}
 ; CHECK: !1 = distinct !{!1, !2, !"hello: %c"}
 ; CHECK: !2 = distinct !{!2, !"hello"}
 ; CHECK: !3 = !{!4}
 ; CHECK: !4 = distinct !{!4, !2, !"hello: %a"}
 ; CHECK: !5 = !{!4, !1}
 

llvm/test/Transforms/MemCpyOpt/memcpy.ll

 
 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) nounwind
 declare void @llvm.memcpy.p1i8.p0i8.i64(i8 addrspace(1)* nocapture, i8* nocapture, i64, i1) nounwind
 
 declare void @f1(%struct.big* nocapture sret)
 declare void @f2(%struct.big*)
 
 ; CHECK: attributes [[$NUW]] = { nounwind }
-; CHECK: attributes #1 = { argmemonly nounwind }
+; CHECK: attributes #1 = { argmemonly nounwind willreturn }
 ; CHECK: attributes #2 = { nounwind ssp }
 ; CHECK: attributes #3 = { nounwind ssp uwtable }

llvm/test/Transforms/ObjCARC/basic.ll

 !3 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
                              file: !4,
                              isOptimized: true, flags: "-O2",
                              splitDebugFilename: "abc.debug", emissionKind: 2)
 !4 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")
 !5 = !{i32 2, !"Debug Info Version", i32 3}
 
 ; CHECK: attributes [[NUW]] = { nounwind }
-; CHECK: attributes #1 = { nounwind readnone speculatable }
+; CHECK: attributes #1 = { nounwind readnone speculatable willreturn }
 ; CHECK: ![[RELEASE]] = !{}

llvm/test/Transforms/ObjCARC/ensure-that-exception-unwind-path-is-visited.ll

 
 declare void @llvm.objc.release(i8*) nonlazybind
 
 declare void @NSLog(i8*, ...)
 
 declare void @llvm.dbg.value(metadata, metadata, metadata) nounwind readnone
 
 ; CHECK: attributes #0 = { ssp uwtable }
-; CHECK: attributes #1 = { nounwind readnone speculatable }
+; CHECK: attributes #1 = { nounwind readnone speculatable willreturn }
 ; CHECK: attributes #2 = { nonlazybind }
 ; CHECK: attributes [[NUW]] = { nounwind }
 ; CHECK: attributes #4 = { noinline ssp uwtable }
 
 !llvm.dbg.cu = !{!0}
 !llvm.module.flags = !{!33, !34, !35, !36, !61}
 
 !0 = distinct !DICompileUnit(language: DW_LANG_ObjC, producer: "clang version 3.3 ", isOptimized: true, runtimeVersion: 2, emissionKind: FullDebug, file: !60, enums: !1, retainedTypes: !1, globals: !1)

llvm/test/Transforms/ObjCARC/nested.ll

entry:
   %strongdestroy25 = load i8*, i8** %foo10, align 8
   call void @llvm.objc.release(i8* %strongdestroy25) nounwind, !clang.imprecise_release !0
   call void @llvm.objc.release(i8* %call) nounwind, !clang.imprecise_release !0
   ret void
 }
 
 
 ; CHECK: attributes [[NUW]] = { nounwind }
-; CHECK: attributes #1 = { argmemonly nounwind }
+; CHECK: attributes #1 = { argmemonly nounwind willreturn }
 ; CHECK: attributes #2 = { nonlazybind }

llvm/test/Transforms/SLPVectorizer/X86/call.ll

 }
 
 
 ; CHECK: declare <2 x double> @llvm.sin.v2f64(<2 x double>) [[ATTR0:#[0-9]+]]
 ; CHECK: declare <2 x double> @llvm.cos.v2f64(<2 x double>) [[ATTR0]]
 ; CHECK: declare <2 x double> @llvm.pow.v2f64(<2 x double>, <2 x double>) [[ATTR0]]
 ; CHECK: declare <2 x double> @llvm.exp2.v2f64(<2 x double>) [[ATTR0]]
 
-; CHECK: attributes [[ATTR0]] = { nounwind readnone speculatable }
+; CHECK: attributes [[ATTR0]] = { nounwind readnone speculatable willreturn }
 

llvm/test/Verifier/fp-intrinsics.ll

 ; RUN: opt -verify -S < %s 2>&1 | FileCheck --check-prefix=CHECK1 %s
 ; RUN: sed -e s/.T2:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK2 %s
 ; RUN: sed -e s/.T3:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK3 %s
 ; RUN: sed -e s/.T4:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK4 %s
 ; RUN: sed -e s/.T5:// %s | not opt -verify -disable-output 2>&1 | FileCheck --check-prefix=CHECK5 %s
 
 ; Common declarations used for all runs.
 declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata)
 declare double @llvm.experimental.constrained.sqrt.f64(double, metadata, metadata)
 
 ; Test that the verifier accepts legal code, and that the correct attributes are
 ; attached to the FP intrinsic.
 ; CHECK1: declare double @llvm.experimental.constrained.fadd.f64(double, double, metadata, metadata) #[[ATTR:[0-9]+]]
 ; CHECK1: declare double @llvm.experimental.constrained.sqrt.f64(double, metadata, metadata) #[[ATTR]]
-; CHECK1: attributes #[[ATTR]] = { inaccessiblememonly nounwind }
+; CHECK1: attributes #[[ATTR]] = { inaccessiblememonly nounwind willreturn }
 ; Note: FP exceptions aren't usually caught through normal unwind mechanisms,
 ;       but we may want to revisit this for asynchronous exception handling.
 define double @f1(double %a, double %b) {
 entry:
   %fadd = call double @llvm.experimental.constrained.fadd.f64(
                                                double %a, double %b,
                                                metadata !"round.dynamic",
                                                metadata !"fpexcept.strict")