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Handle the constantfp created during post-legalization dag combiner phase.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78594 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-08-10 20:25:59 +00:00
parent 70671845ad
commit e2b861f7d9
2 changed files with 33 additions and 0 deletions
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18
lib/Target/ARM/ARMISelDAGToDAG.cpp
View File

@ -988,6 +988,24 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) {
// Other cases are autogenerated.
break;
}
case ISD::ConstantFP: {
ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(N);
MVT VT = CFP->getValueType(0);
ConstantFP *LLVMC = const_cast<ConstantFP*>(CFP->getConstantFPValue());
SDValue CPIdx = CurDAG->getTargetConstantPool(LLVMC, TLI.getPointerTy());
SDNode *ResNode;
SDValue Ops[] = {
CPIdx,
CurDAG->getTargetConstant(0, MVT::i32),
getAL(CurDAG),
CurDAG->getRegister(0, MVT::i32),
CurDAG->getEntryNode()
};
unsigned Opc = (VT == MVT::f32) ? ARM::FLDS : ARM::FLDD;
ResNode=CurDAG->getTargetNode(Opc, dl, VT, MVT::Other, Ops, 5);
ReplaceUses(Op, SDValue(ResNode, 0));
return NULL;
}
case ISD::FrameIndex: {
// Selects to ADDri FI, 0 which in turn will become ADDri SP, imm.
int FI = cast<FrameIndexSDNode>(N)->getIndex();

15
test/CodeGen/Thumb2/2009-08-10-ISelBug.ll Normal file
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@ -0,0 +1,15 @@
; RUN: llvm-as < %s | llc -mtriple=thumbv7-apple-darwin -mattr=+vfp2
define arm_apcscc float @t1(i32 %v0) nounwind {
entry:
store i32 undef, i32* undef, align 4
%0 = load [4 x i8]** undef, align 4 ; <[4 x i8]*> [#uses=1]
%1 = load i8* undef, align 1 ; <i8> [#uses=1]
%2 = zext i8 %1 to i32 ; <i32> [#uses=1]
%3 = getelementptr [4 x i8]* %0, i32 %v0, i32 0 ; <i8*> [#uses=1]
%4 = load i8* %3, align 1 ; <i8> [#uses=1]
%5 = zext i8 %4 to i32 ; <i32> [#uses=1]
%6 = sub i32 %5, %2 ; <i32> [#uses=1]
%7 = sitofp i32 %6 to float ; <float> [#uses=1]
ret float %7
}