[llvm] r217211 - Disable the fix for pr20793 because of a gnu ld bug.

[Rafael Espindola]

Author: rafael
Date: Thu Sep  4 19:14:12 2014
New Revision: 217211

URL: http://llvm.org/viewvc/llvm-project?rev=217211&view=rev
Log:
Disable the fix for pr20793 because of a gnu ld bug.

Modified:
    llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
    llvm/trunk/test/CodeGen/X86/constructor.ll

Modified: llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp?rev=217211&r1=217210&r2=217211&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp (original)
+++ llvm/trunk/lib/CodeGen/TargetLoweringObjectFileImpl.cpp Thu Sep  4 19:14:12 2014
@@ -31,6 +31,7 @@
 #include "llvm/MC/MCSectionMachO.h"
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Dwarf.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -41,6 +42,13 @@
 using namespace llvm;
 using namespace dwarf;
 
+// Disabled by default because it hits bug 17350 in GNU ld (gold is fine)
+static cl::opt<bool>
+    EnableStructorCOMDAT("enable-structor-comdat", cl::Hidden,
+                         cl::desc("Use comdats to keep only one copy of a "
+                                  "constructor/destructor invocation"),
+                         cl::init(false));
+
 //===----------------------------------------------------------------------===//
 //                                  ELF
 //===----------------------------------------------------------------------===//
@@ -363,6 +371,9 @@ static const MCSectionELF *getStaticStru
                                                     bool IsCtor,
                                                     unsigned Priority,
                                                     const MCSymbol *KeySym) {
+  if (!EnableStructorCOMDAT)
+    KeySym = nullptr;
+
   std::string Name;
   unsigned Type;
   unsigned Flags = ELF::SHF_ALLOC | ELF::SHF_WRITE;

Modified: llvm/trunk/test/CodeGen/X86/constructor.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/constructor.ll?rev=217211&r1=217210&r2=217211&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/constructor.ll (original)
+++ llvm/trunk/test/CodeGen/X86/constructor.ll Thu Sep  4 19:14:12 2014
@@ -1,5 +1,8 @@
+; RUN: llc -mtriple x86_64-pc-linux -use-ctors -enable-structor-comdat < %s | FileCheck --check-prefix=CTOR-COMDAT %s
+; RUN: llc -mtriple x86_64-pc-linux  -enable-structor-comdat < %s | FileCheck --check-prefix=INIT-ARRAY-COMDAT %s
 ; RUN: llc -mtriple x86_64-pc-linux -use-ctors < %s | FileCheck --check-prefix=CTOR %s
 ; RUN: llc -mtriple x86_64-pc-linux < %s | FileCheck --check-prefix=INIT-ARRAY %s
+
 @llvm.global_ctors = appending global [2 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @f, i8* null}, { i32, void ()*, i8* } { i32 15, void ()* @g, i8* @v }]
 
 @v = weak_odr global i8 0
@@ -14,16 +17,30 @@ entry:
   ret void
 }
 
-; CTOR:		.section	.ctors.65520,"aGw", at progbits,v,comdat
+; CTOR:		.section	.ctors.65520,"aw", at progbits
 ; CTOR-NEXT:	.align	8
 ; CTOR-NEXT:	.quad	g
 ; CTOR-NEXT:	.section	.ctors,"aw", at progbits
 ; CTOR-NEXT:	.align	8
 ; CTOR-NEXT:	.quad	f
 
-; INIT-ARRAY:		.section	.init_array.15,"aGw", at init_array,v,comdat
+; INIT-ARRAY:		.section	.init_array.15,"aw", at init_array
 ; INIT-ARRAY-NEXT:	.align	8
 ; INIT-ARRAY-NEXT:	.quad	g
 ; INIT-ARRAY-NEXT:	.section	.init_array,"aw", at init_array
 ; INIT-ARRAY-NEXT:	.align	8
 ; INIT-ARRAY-NEXT:	.quad	f
+
+; CTOR-COMDAT:		.section	.ctors.65520,"aGw", at progbits,v,comdat
+; CTOR-COMDAT-NEXT:	.align	8
+; CTOR-COMDAT-NEXT:	.quad	g
+; CTOR-COMDAT-NEXT:	.section	.ctors,"aw", at progbits
+; CTOR-COMDAT-NEXT:	.align	8
+; CTOR-COMDAT-NEXT:	.quad	f
+
+; INIT-ARRAY-COMDAT:		.section	.init_array.15,"aGw", at init_array,v,comdat
+; INIT-ARRAY-COMDAT-NEXT:	.align	8
+; INIT-ARRAY-COMDAT-NEXT:	.quad	g
+; INIT-ARRAY-COMDAT-NEXT:	.section	.init_array,"aw", at init_array
+; INIT-ARRAY-COMDAT-NEXT:	.align	8
+; INIT-ARRAY-COMDAT-NEXT:	.quad	f