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If a use operand is marked isKill, don't forget to add kill to its live interval as well. 

llvm-svn: 65279
This commit is contained in:
Evan Cheng 2009-02-22 08:35:56 +00:00
parent bb525c3c7f
commit e779595af0
2 changed files with 30 additions and 4 deletions
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10
llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
View File

@ -519,6 +519,7 @@ SimpleRegisterCoalescing::TrimLiveIntervalToLastUse(unsigned CopyIdx,
// of last use.
LastUse->setIsKill();
removeRange(li, li_->getDefIndex(LastUseIdx), LR->end, li_, tri_);
li.addKill(LR->valno, LastUseIdx+1);
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
if (tii_->isMoveInstr(*LastUseMI, SrcReg, DstReg, SrcSubIdx, DstSubIdx) &&
DstReg == li.reg) {
@ -967,9 +968,10 @@ void SimpleRegisterCoalescing::RemoveCopiesFromValNo(LiveInterval &li,
LastUse = MO;
}
}
if (LastUse)
if (LastUse) {
LastUse->setIsKill();
else {
li.addKill(VNI, LastUseIdx+1);
} else {
// Remove dead implicit_def's.
while (!ImpDefs.empty()) {
MachineInstr *ImpDef = ImpDefs.back();
@ -2331,7 +2333,7 @@ SimpleRegisterCoalescing::lastRegisterUse(unsigned Start, unsigned End,
unsigned Idx = li_->getInstructionIndex(UseMI);
if (Idx >= Start && Idx < End && Idx >= UseIdx) {
LastUse = &Use;
UseIdx = Idx;
UseIdx = li_->getUseIndex(Idx);
}
}
return LastUse;
@ -2357,7 +2359,7 @@ SimpleRegisterCoalescing::lastRegisterUse(unsigned Start, unsigned End,
MachineOperand &Use = MI->getOperand(i);
if (Use.isReg() && Use.isUse() && Use.getReg() &&
tri_->regsOverlap(Use.getReg(), Reg)) {
UseIdx = e;
UseIdx = li_->getUseIndex(e);
return &Use;
}
}

24
llvm/test/CodeGen/ARM/pr3502.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llvm-as < %s | llc -mtriple=arm-none-linux-gnueabi
;pr3502
target datalayout = "e-p:32:32:32-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"
%struct.ArmPTD = type { i32 }
%struct.RegisterSave = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
%struct.SHARED_AREA = type { i32, %struct.SHARED_AREA*, %struct.SHARED_AREA*, %struct.SHARED_AREA*, %struct.ArmPTD, void (%struct.RegisterSave*)*, void (%struct.RegisterSave*)*, i32, [1024 x i8], i32, i32, i32, i32, i32, i8, i8, i16, i32, i32, i32, i32, [16 x i8], i32, i32, i32, i8, i8, i8, i32, i16, i32, i64, i32, i32, i32, i32, i32, i32, i8*, i32, [256 x i8], i32, i32, i32, [20 x i8], %struct.RegisterSave, { %struct.WorldSwitchV5 }, [4 x i32] }
%struct.WorldSwitchV5 = type { i32, i32, i32, i32, i32, i32, i32 }
define void @SomeCall(i32 %num) nounwind {
entry:
tail call void asm sideeffect "mcr p15, 0, $0, c7, c10, 4 \0A\09", "r,~{memory}"(i32 0) nounwind
tail call void asm sideeffect "mcr p15,0,$0,c7,c14,0", "r,~{memory}"(i32 0) nounwind
%0 = load %struct.SHARED_AREA** null, align 4 ; <%struct.SHARED_AREA*> [#uses=1]
%1 = ptrtoint %struct.SHARED_AREA* %0 to i32 ; <i32> [#uses=1]
%2 = lshr i32 %1, 20 ; <i32> [#uses=1]
%3 = tail call i32 @SetCurrEntry(i32 %2, i32 0) nounwind ; <i32> [#uses=0]
tail call void @ClearStuff(i32 0) nounwind
ret void
}
declare i32 @SetCurrEntry(i32, i32)
declare void @ClearStuff(i32)