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Avoid folding ADD instructions with FI operands. 

PEI can't handle the pseudo-instructions. This can be removed when the
pseudo-instructions are replaced by normal predicated instructions.

Fixes PR13628.

llvm-svn: 162130
This commit is contained in:
Jakob Stoklund Olesen 2012-08-17 20:55:34 +00:00
parent 3a4b644982
commit 7b1a2e8f02
2 changed files with 14 additions and 0 deletions
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3
llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
View File

@ -1583,6 +1583,9 @@ static unsigned canFoldIntoMOVCC(unsigned Reg, MachineInstr *&MI,
// predicated instructions which will be reading CPSR.
for (unsigned i = 1, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
// Reject frame index operands, PEI can't handle the predicated pseudos.
if (MO.isFI() || MO.isCPI() || MO.isJTI())
return 0;
if (!MO.isReg())
continue;
if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))

11
llvm/test/CodeGen/ARM/select_xform.ll
View File

@ -179,3 +179,14 @@ define i32 @t12(i32 %a, i32 %b) nounwind {
%tmp1 = select i1 %cond, i32 %a, i32 %x
ret i32 %tmp1
}
; Handle frame index operands.
define void @pr13628() nounwind uwtable align 2 {
%x3 = alloca i8, i32 256, align 8
%x4 = load i8* undef, align 1
%x5 = icmp ne i8 %x4, 0
%x6 = select i1 %x5, i8* %x3, i8* null
call void @bar(i8* %x6) nounwind
ret void
}
declare void @bar(i8*)