r205144 - [PowerPC] Make -pg generate calls to _mcount not mcount

[Hal Finkel]

Author: hfinkel
Date: Sun Mar 30 08:00:06 2014
New Revision: 205144

URL: http://llvm.org/viewvc/llvm-project?rev=205144&view=rev
Log:
[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.

Modified:
    cfe/trunk/lib/Basic/Targets.cpp
    cfe/trunk/test/CodeGen/mcount.c

Modified: cfe/trunk/lib/Basic/Targets.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets.cpp?rev=205144&r1=205143&r2=205144&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets.cpp (original)
+++ cfe/trunk/lib/Basic/Targets.cpp Sun Mar 30 08:00:06 2014
@@ -355,6 +355,16 @@ 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;
+    }
   }
 
   const char *getStaticInitSectionSpecifier() const override {

Modified: cfe/trunk/test/CodeGen/mcount.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/mcount.c?rev=205144&r1=205143&r2=205144&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/mcount.c (original)
+++ cfe/trunk/test/CodeGen/mcount.c Sun Mar 30 08:00:06 2014
@@ -1,4 +1,8 @@
 // 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()
 }