[UnknownProvenance] Add llvm-c support

[jeroen.dobbelaere]

Summary

llvm-c support for UnknownProvenance.

[deadalnix]

llvm/tools/llvm-c-test/echo.cpp

354

This is great that you though of updating the echo test.

The echo test is a test that read some IR, and then spit it back out, using the C API. There are some files containing LLVM IR that contain various pieces of IR that are run through he echo tool. This ensure that the IR is read and then regenerated properly through the C API.

It would be great if you could either modify an existing test or add a new one so that the unknown provenance construct is exercised by the C API - which in turn will prove that this code works as expected.

[jeroen.dobbelaere]

llvm/tools/llvm-c-test/echo.cpp

354

Could you point me to a test that is using this 'echo' ? It is possible that I can only add the test itself once D104268, D104269 and D104270 are added.

[jeroen.dobbelaere]

Moved into D111159

llvm/lib/IR/Core.cpp

 LLVMBool LLVMIsPoison(LLVMValueRef Val) {
   return isa<PoisonValue>(unwrap(Val));
 }
 
 LLVMValueRef LLVMConstPointerNull(LLVMTypeRef Ty) {
   return wrap(ConstantPointerNull::get(unwrap<PointerType>(Ty)));
 }
 
+LLVMBool LLVMIsUnknownProvenance(LLVMValueRef Val) {
+  return isa<UnknownProvenance>(unwrap(Val));
+}
+
+LLVMValueRef LLVMGetUnknownProvenance(LLVMTypeRef Ty) {
+  return wrap(UnknownProvenance::get(unwrap<PointerType>(Ty)));
+}
+
 /*--.. Operations on metadata nodes ........................................--*/
 
 LLVMMetadataRef LLVMMDStringInContext2(LLVMContextRef C, const char *Str,
                                        size_t SLen) {
   return wrap(MDString::get(*unwrap(C), StringRef(Str, SLen)));
 }
 
 LLVMMetadataRef LLVMMDNodeInContext2(LLVMContextRef C, LLVMMetadataRef *MDs,

llvm/tools/llvm-c-test/echo.cpp

static LLVMValueRef clone_constant_impl(LLVMValueRef Cst, LLVMModuleRef M) {
   }
 
   // Try undef
   if (LLVMIsUndef(Cst)) {
     check_value_kind(Cst, LLVMUndefValueValueKind);
     return LLVMGetUndef(TypeCloner(M).Clone(Cst));
   }
 
+  // Try unknown_provenance
+  if (LLVMIsUnknownProvenance(Cst)) {
+    check_value_kind(Cst, LLVMUnknownProvenanceValueKind);
+    return LLVMGetUnknownProvenance(TypeCloner(M).Clone(Cst));
+  }
+
   // Try poison
   if (LLVMIsPoison(Cst)) {
     check_value_kind(Cst, LLVMPoisonValueValueKind);
     return LLVMGetPoison(TypeCloner(M).Clone(Cst));
   }
 
   // Try null
   if (LLVMIsNull(Cst)) {