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Missed a hasInterval check.

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llvm-svn: 49415
This commit is contained in:
Evan Cheng 2008-04-09 01:30:15 +00:00
parent 9d4d2f566e
commit f35cc57821
2 changed files with 21 additions and 0 deletions
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2
lib/CodeGen/SimpleRegisterCoalescing.cpp
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@ -1655,6 +1655,8 @@ SimpleRegisterCoalescing::TurnCopyIntoImpDef(MachineBasicBlock::iterator &I,
LiveInterval &SrcInt = li_->getInterval(SrcReg);
if (!SrcInt.empty())
return false;
if (!li_->hasInterval(DstReg))
return false;
LiveInterval &DstInt = li_->getInterval(DstReg);
LiveInterval::iterator DstLR = DstInt.FindLiveRangeContaining(CopyIdx);
DstInt.removeValNo(DstLR->valno);

19
test/CodeGen/X86/2008-04-08-CoalescerCrash.ll Normal file
View File

@ -0,0 +1,19 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+mmx
define i32 @t2() nounwind {
entry:
tail call void asm sideeffect "# top of block", "~{dirflag},~{fpsr},~{flags},~{di},~{si},~{dx},~{cx},~{ax}"( ) nounwind
tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
tail call void asm sideeffect ".line 8", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
%tmp1 = tail call <2 x i32> asm sideeffect "movd $1, $0", "=={mm4},{bp},~{dirflag},~{fpsr},~{flags},~{memory}"( i32 undef ) nounwind ; <<2 x i32>> [#uses=1]
tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
tail call void asm sideeffect ".line 9", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
%tmp3 = tail call i32 asm sideeffect "movd $1, $0", "=={bp},{mm3},~{dirflag},~{fpsr},~{flags},~{memory}"( <2 x i32> undef ) nounwind ; <i32> [#uses=1]
tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
tail call void asm sideeffect ".line 10", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
tail call void asm sideeffect "movntq $0, 0($1,$2)", "{mm0},{di},{bp},~{dirflag},~{fpsr},~{flags},~{memory}"( <2 x i32> undef, i32 undef, i32 %tmp3 ) nounwind
tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
tail call void asm sideeffect ".line 11", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
%tmp8 = tail call i32 asm sideeffect "movd $1, $0", "=={bp},{mm4},~{dirflag},~{fpsr},~{flags},~{memory}"( <2 x i32> %tmp1 ) nounwind ; <i32> [#uses=0]
ret i32 undef
}