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Looks like OS X assemblers (including MC) don't like 

foo:
bar = foo
.quad bar

Avoid producing it. Fixes PR9951.

llvm-svn: 131687
This commit is contained in:
Rafael Espindola 2011-05-19 22:05:56 +00:00
parent 7b0290da3f
commit 1edfb17bc2
2 changed files with 25 additions and 1 deletions
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3
llvm/lib/MC/MCStreamer.cpp
View File

@ -43,7 +43,8 @@ const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
}
const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
if (Context.getAsmInfo().hasAggressiveSymbolFolding())
if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
isa<MCSymbolRefExpr>(Expr))
return Expr;
MCSymbol *ABS = Context.CreateTempSymbol();

23
llvm/test/DebugInfo/pr9951.ll Normal file
View File

@ -0,0 +1,23 @@
; RUN: llc -mtriple x86_64-apple-darwin10.0.0 -disable-cfi %s -o - | FileCheck %s
define i32 @f() nounwind {
entry:
ret i32 42
}
!llvm.dbg.sp = !{!0}
!0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"f", metadata !"f", metadata !"", metadata !1, i32 1, metadata !3, i1 false, i1 true, i32 0, i32 0, i32 0, i32 256, i1 false, i32 ()* @f, null, null} ; [ DW_TAG_subprogram ]
!1 = metadata !{i32 589865, metadata !"/home/espindola/llvm/test.c", metadata !"/home/espindola/llvm/build-rust2", metadata !2} ; [ DW_TAG_file_type ]
!2 = metadata !{i32 589841, i32 0, i32 12, metadata !"/home/espindola/llvm/test.c", metadata !"/home/espindola/llvm/build-rust2", metadata !"clang version 3.0 ()", i1 true, i1 false, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
!3 = metadata !{i32 589845, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !4, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
!4 = metadata !{metadata !5}
!5 = metadata !{i32 589860, metadata !2, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]
; CHECK: _f: ## @f
; CHECK-NEXT: Ltmp0:
; CHECK: Ltmp9 = (Ltmp3-Ltmp2)-0
; CHECK-NEXT: .long Ltmp9
; CHECK-NEXT: .quad Ltmp0