Commit 2c2b1619 authored by Tom Stellard's avatar Tom Stellard
Browse files

Merging r205144: 

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r205144 | hfinkel | 2014-03-30 09:00:06 -0400 (Sun, 30 Mar 2014) | 7 lines

[PowerPC] Make -pg generate calls to _mcount not mcount

At least on REL6 (Linux/glibc 2.12), the proper symbol for generating gprof
data is _mcount, not mcount. Prior to this change, compiling with -pg would
generate linking errors (because of unresolved references to mcount), after
this change -pg seems at least minimally functional.

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llvm-svn: 206058
parent c26b5e82

clang/lib/Basic/Targets.cpp

+10 −0
Original line number Diff line number Diff line
@@ -358,6 +358,16 @@ public: 
  LinuxTargetInfo(const llvm::Triple &Triple) : OSTargetInfo<Target>(Triple) {

    this->UserLabelPrefix = "";

    this->WIntType = TargetInfo::UnsignedInt;



    switch (Triple.getArch()) {

    default:

      break;

    case llvm::Triple::ppc:

    case llvm::Triple::ppc64:

    case llvm::Triple::ppc64le:

      this->MCountName = "_mcount";

      break;

    }

  }



  virtual const char *getStaticInitSectionSpecifier() const {

clang/test/CodeGen/mcount.c

+4 −0
Original line number Diff line number Diff line 
// RUN: %clang_cc1 -pg -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s

// RUN: %clang_cc1 -pg -triple powerpc-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-PPC %s

// RUN: %clang_cc1 -pg -triple powerpc64-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-PPC %s

// RUN: %clang_cc1 -pg -triple powerpc64le-unknown-gnu-linux -emit-llvm -o - %s | FileCheck -check-prefix=CHECK-PPC %s

void foo(void) {

// CHECK: call void @mcount()

// CHECK-PPC: call void @_mcount()

}