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ARM: Properly constrain comparison fastisel register classes.

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Ongoing 'make the verifier happy' improvements to ARM fast-isel.

rdar://12594152

llvm-svn: 188595
This commit is contained in:
Jim Grosbach 2013-08-16 23:37:40 +00:00
parent 4829862a24
commit 58bafdb9f1
2 changed files with 13 additions and 6 deletions
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17
lib/Target/ARM/ARMFastISel.cpp
View File

@ -1537,13 +1537,15 @@ bool ARMFastISel::ARMEmitCmp(const Value *Src1Value, const Value *Src2Value,
}
}
const MCInstrDesc &II = TII.get(CmpOpc);
SrcReg1 = constrainOperandRegClass(II, SrcReg1, 0);
if (!UseImm) {
AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
TII.get(CmpOpc))
SrcReg2 = constrainOperandRegClass(II, SrcReg2, 1);
AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(SrcReg1).addReg(SrcReg2));
} else {
MachineInstrBuilder MIB;
MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(CmpOpc))
MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, II)
.addReg(SrcReg1);
// Only add immediate for icmp as the immediate for fcmp is an implicit 0.0.
@ -1742,6 +1744,7 @@ bool ARMFastISel::SelectSelect(const Instruction *I) {
}
unsigned CmpOpc = isThumb2 ? ARM::t2CMPri : ARM::CMPri;
CondReg = constrainOperandRegClass(TII.get(CmpOpc), CondReg, 0);
AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(CmpOpc))
.addReg(CondReg).addImm(0));
@ -1758,12 +1761,16 @@ bool ARMFastISel::SelectSelect(const Instruction *I) {
MovCCOpc = isThumb2 ? ARM::t2MVNCCi : ARM::MVNCCi;
}
unsigned ResultReg = createResultReg(RC);
if (!UseImm)
if (!UseImm) {
Op2Reg = constrainOperandRegClass(TII.get(MovCCOpc), Op1Reg, 1);
Op1Reg = constrainOperandRegClass(TII.get(MovCCOpc), Op1Reg, 2);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(MovCCOpc), ResultReg)
.addReg(Op2Reg).addReg(Op1Reg).addImm(ARMCC::NE).addReg(ARM::CPSR);
else
} else {
Op1Reg = constrainOperandRegClass(TII.get(MovCCOpc), Op1Reg, 1);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(MovCCOpc), ResultReg)
.addReg(Op1Reg).addImm(Imm).addImm(ARMCC::EQ).addReg(ARM::CPSR);
}
UpdateValueMap(I, ResultReg);
return true;
}

2
test/CodeGen/ARM/fast-isel-select.ll
View File

@ -1,6 +1,6 @@
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=armv7-apple-ios | FileCheck %s --check-prefix=ARM
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=armv7-linux-gnueabi | FileCheck %s --check-prefix=ARM
; RUN: llc < %s -O0 -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios | FileCheck %s --check-prefix=THUMB
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -relocation-model=dynamic-no-pic -mtriple=thumbv7-apple-ios | FileCheck %s --check-prefix=THUMB
define i32 @t1(i1 %c) nounwind readnone {
entry: