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[X86] Query constant pool object alignment instead of hardcoding.

This commit is contained in:
Craig Topper 2020-02-26 14:11:19 -08:00
parent 9c1a707ba3
commit 77d9b7b2cd
1 changed files with 2 additions and 1 deletions
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3
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -19627,6 +19627,7 @@ SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
APInt FF(64, 0x5F80000000000000ULL);
SDValue FudgePtr = DAG.getConstantPool(
ConstantInt::get(*DAG.getContext(), FF), PtrVT);
unsigned CPAlignment = cast<ConstantPoolSDNode>(FudgePtr)->getAlignment();
// Get a pointer to FF if the sign bit was set, or to 0 otherwise.
SDValue Zero = DAG.getIntPtrConstant(0, dl);
@ -19638,7 +19639,7 @@ SDValue X86TargetLowering::LowerUINT_TO_FP(SDValue Op,
SDValue Fudge = DAG.getExtLoad(
ISD::EXTLOAD, dl, MVT::f80, Chain, FudgePtr,
MachinePointerInfo::getConstantPool(DAG.getMachineFunction()), MVT::f32,
/* Alignment = */ 4);
CPAlignment);
Chain = Fudge.getValue(1);
// Extend everything to 80 bits to force it to be done on x87.
// TODO: Are there any fast-math-flags to propagate here?