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Fix a FIXME. _foo.eh symbols are currently always exported so that the linker 

knows about them. This is not necessary on 10.6 and later.

llvm-svn: 114997
This commit is contained in:
Bill Wendling 2010-09-28 22:36:56 +00:00
parent 25a7bc9081
commit d848beb1e5
2 changed files with 29 additions and 13 deletions
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18
llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
View File

@ -444,27 +444,19 @@ getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
// _foo.eh symbols are currently always exported so that the linker knows
// about them. This is not necessary on 10.6 and later, but it
// doesn't hurt anything.
// FIXME: I need to get this from Triple.
IsFunctionEHSymbolGlobal = true;
IsFunctionEHFrameSymbolPrivate = false;
SupportsWeakOmittedEHFrame = false;
Triple T(((LLVMTargetMachine&)TM).getTargetTriple());
if (T.getOS() == Triple::Darwin) {
switch (T.getDarwinMajorNumber()) {
case 7: // 10.3 Panther.
case 8: // 10.4 Tiger.
unsigned MajNum = T.getDarwinMajorNumber();
if (MajNum == 7 || MajNum == 8) // 10.3 Panther, 10.4 Tiger
CommDirectiveSupportsAlignment = false;
break;
case 9: // 10.5 Leopard.
case 10: // 10.6 SnowLeopard.
break;
}
if (MajNum > 9) // 10.6 SnowLeopard
IsFunctionEHSymbolGlobal = false;
}
TargetLoweringObjectFile::Initialize(Ctx, TM);
TextSection // .text

24
llvm/test/CodeGen/X86/non-globl-eh-frame.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llc < %s -mtriple x86_64-apple-darwin10 -march x86 | not grep {{.globl\[\[:space:\]\]*__Z4funcv.eh}}
; RUN: llc < %s -mtriple x86_64-apple-darwin9 -march x86 | FileCheck %s -check-prefix=DARWIN9
%struct.__pointer_type_info_pseudo = type { %struct.__type_info_pseudo, i32, %"struct.std::type_info"* }
%struct.__type_info_pseudo = type { i8*, i8* }
%"struct.std::type_info" = type opaque
@.str = private constant [12 x i8] c"hello world\00", align 1
@_ZTIPc = external constant %struct.__pointer_type_info_pseudo
define void @_Z4funcv() noreturn optsize ssp {
entry:
%0 = tail call i8* @__cxa_allocate_exception(i64 8) nounwind
%1 = bitcast i8* %0 to i8**
store i8* getelementptr inbounds ([12 x i8]* @.str, i64 0, i64 0), i8** %1, align 8
tail call void @__cxa_throw(i8* %0, i8* bitcast (%struct.__pointer_type_info_pseudo* @_ZTIPc to i8*), void (i8*)* null) noreturn
unreachable
}
; DARWIN9: .globl __Z4funcv.eh
declare i8* @__cxa_allocate_exception(i64) nounwind
declare void @__cxa_throw(i8*, i8*, void (i8*)*) noreturn