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PR2598: make sure to expand illegal forms of integer/floating-point

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conversions for x86, like <2 x i32> -> <2 x float> and <4 x i16> -> 
<4 x float>.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72983 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2009-06-06 03:57:58 +00:00
parent f5b0c5a1c7
commit 23ef105580
2 changed files with 39 additions and 0 deletions
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26
lib/Target/X86/X86ISelLowering.cpp
View File

@ -550,6 +550,10 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
setOperationAction(ISD::FLOG10, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::FEXP, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::FEXP2, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::FP_TO_UINT, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::FP_TO_SINT, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::UINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
setOperationAction(ISD::SINT_TO_FP, (MVT::SimpleValueType)VT, Expand);
}
// FIXME: In order to prevent SSE instructions being expanded to MMX ones
@ -734,6 +738,12 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
if (!DisableMMX && Subtarget->hasMMX()) {
setOperationAction(ISD::FP_TO_SINT, MVT::v2i32, Custom);
setOperationAction(ISD::SINT_TO_FP, MVT::v2i32, Custom);
}
}
if (Subtarget->hasSSE41()) {
@ -4558,6 +4568,14 @@ SDValue X86TargetLowering::LowerShift(SDValue Op, SelectionDAG &DAG) {
SDValue X86TargetLowering::LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
MVT SrcVT = Op.getOperand(0).getValueType();
if (SrcVT.isVector()) {
if (SrcVT == MVT::v2i32 && Op.getValueType() == MVT::v2f64) {
return Op;
}
return SDValue();
}
assert(SrcVT.getSimpleVT() <= MVT::i64 && SrcVT.getSimpleVT() >= MVT::i16 &&
"Unknown SINT_TO_FP to lower!");
@ -4849,6 +4867,14 @@ FP_TO_INTHelper(SDValue Op, SelectionDAG &DAG, bool IsSigned) {
}
SDValue X86TargetLowering::LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
if (Op.getValueType().isVector()) {
if (Op.getValueType() == MVT::v2i32 &&
Op.getOperand(0).getValueType() == MVT::v2f64) {
return Op;
}
return SDValue();
}
std::pair<SDValue,SDValue> Vals = FP_TO_INTHelper(Op, DAG, true);
SDValue FIST = Vals.first, StackSlot = Vals.second;
// If FP_TO_INTHelper failed, the node is actually supposed to be Legal.

13
test/CodeGen/X86/2009-06-05-sitofpCrash.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse
; PR2598
define <2 x float> @a(<2 x i32> %i) nounwind {
%r = sitofp <2 x i32> %i to <2 x float>
ret <2 x float> %r
}
define <2 x i32> @b(<2 x float> %i) nounwind {
%r = fptosi <2 x float> %i to <2 x i32>
ret <2 x i32> %r
}