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Simplify cfg inserts a call to trap when unreachable code is detected. Assign DebugLoc to this new trap instruction.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130315 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-04-27 17:59:27 +00:00
parent 93e110ba34
commit 7878f37cf0
2 changed files with 21 additions and 1 deletions
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3
lib/Transforms/Scalar/SimplifyCFGPass.cpp
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@ -73,7 +73,8 @@ static void ChangeToUnreachable(Instruction *I, bool UseLLVMTrap) {
if (UseLLVMTrap) {
Function *TrapFn =
Intrinsic::getDeclaration(BB->getParent()->getParent(), Intrinsic::trap);
CallInst::Create(TrapFn, "", I);
CallInst *CallTrap = CallInst::Create(TrapFn, "", I);
CallTrap->setDebugLoc(I->getDebugLoc());
}
new UnreachableInst(I->getContext(), I);

19
test/Transforms/SimplifyCFG/trap-debugloc.ll Normal file
View File

@ -0,0 +1,19 @@
; RUN: opt -S -simplifycfg < %s | FileCheck %s
; Radar 9342286
; Assign DebugLoc to trap instruction.
define void @foo() nounwind ssp {
; CHECK: call void @llvm.trap(), !dbg
store i32 42, i32* null, !dbg !5
ret void, !dbg !7
}
!llvm.dbg.sp = !{!0}
!0 = metadata !{i32 589870, i32 0, metadata !1, metadata !"foo", metadata !"foo", metadata !"", metadata !1, i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, i32 0, i32 0, i1 false, void ()* @foo} ; [ DW_TAG_subprogram ]
!1 = metadata !{i32 589865, metadata !"foo.c", metadata !"/private/tmp", metadata !2} ; [ DW_TAG_file_type ]
!2 = metadata !{i32 589841, i32 0, i32 12, metadata !"foo.c", metadata !"/private/tmp", metadata !"Apple clang version 3.0 (tags/Apple/clang-206.1) (based on LLVM 3.0svn)", 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 !{null}
!5 = metadata !{i32 4, i32 2, metadata !6, null}
!6 = metadata !{i32 589835, metadata !0, i32 3, i32 12, metadata !1, i32 0} ; [ DW_TAG_lexical_block ]
!7 = metadata !{i32 5, i32 1, metadata !6, null}