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Stack Coloring: Dont crash on dbg values which use stack frames.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163616 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem 2012-09-11 12:34:27 +00:00
parent 468a95fb04
commit 8754bbbe67
2 changed files with 35 additions and 3 deletions
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8
lib/CodeGen/StackColoring.cpp
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@ -523,10 +523,12 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
// the calculated range then it means that the alloca usage moved
// outside of the lifetime markers.
#ifndef NDEBUG
SlotIndex Index = Indexes->getInstructionIndex(I);
LiveInterval* Interval = Intervals[FromSlot];
assert(Interval->find(Index) != Interval->end() &&
if (!I->isDebugValue()) {
SlotIndex Index = Indexes->getInstructionIndex(I);
LiveInterval* Interval = Intervals[FromSlot];
assert(Interval->find(Index) != Interval->end() &&
"Found instruction usage outside of live range.");
}
#endif
// Fix the machine instructions.

30
test/CodeGen/X86/StackColoring-dbg.ll Normal file
View File

@ -0,0 +1,30 @@
; RUN: llc -mcpu=corei7 -no-stack-coloring=false < %s
; Make sure that we don't crash when dbg values are used.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.8.0"
declare void @llvm.dbg.declare(metadata, metadata) nounwind readnone
define void @foo() nounwind uwtable ssp {
entry:
%x.i = alloca i8, align 1
%y.i = alloca [256 x i8], align 16
%0 = getelementptr inbounds [256 x i8]* %y.i, i64 0, i64 0
br label %for.body
for.body:
call void @llvm.lifetime.end(i64 -1, i8* %0) nounwind
call void @llvm.lifetime.start(i64 -1, i8* %x.i) nounwind
call void @llvm.dbg.declare(metadata !{i8* %x.i}, metadata !22) nounwind
br label %for.body
}
declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
!16 = metadata !{i32 786468, null, metadata !"char", null, i32 0, i64 8, i64 8, i64 0, i32 0, i32 6}
!2 = metadata !{i32 0}
!22 = metadata !{i32 786688, metadata !2, metadata !"x", metadata !2, i32 16, metadata !16, i32 0, i32 0}