[PowerPC] Implement shouldExtI32* hooks.

[• koriakin]

Summary

On PowerPC64, i32 parameters corresponding to C-level int or unsigned int
need signext or zeroext attribute, respectively. Fill the TTI hooks so
that LLVM passes inserting library calls with such parameters know to use
the attribute.

[• koriakin]

Depends on D21736, D21739.

[• koriakin]

Abandoning in favor of D21739.

lib/Target/PowerPC/PPCTargetTransformInfo.h

int getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
                       unsigned AddressSpace);
   int getInterleavedMemoryOpCost(unsigned Opcode, Type *VecTy,
                                  unsigned Factor,
                                  ArrayRef<unsigned> Indices,
                                  unsigned Alignment,
                                  unsigned AddressSpace);
 
   /// @}
+
+  bool shouldExtI32Param() const { return ST->isPPC64(); }
+  bool shouldExtI32Result() const { return ST->isPPC64(); }
 };
 
 } // end namespace llvm
 
 #endif

test/Instrumentation/InstrProfiling/icall.ll

 ;; Check that static counters are allocated for value profiler
 
 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -vp-static-alloc=true -instrprof -S | FileCheck %s --check-prefix=STATIC
 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC
+; RUN: opt < %s -mtriple=powerpc-unknown-linux -instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC
 ; RUN: opt < %s -mtriple=s390x-unknown-linux -instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC-EXT
+; RUN: opt < %s -mtriple=powerpc64-unknown-linux -instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC-EXT
 ; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -vp-static-alloc=false -instrprof -S | FileCheck %s --check-prefix=DYN
 ; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -vp-static-alloc=false -S | FileCheck %s --check-prefix=DYN
 
 
 @__profn_foo = private constant [3 x i8] c"foo"
 
 define i32 @foo(i32 ()* ) {
   call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @__profn_foo, i32 0, i32 0), i64 12884901887, i32 1, i32 0)