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[LegalizeTypes] Add SoftenFloatRes_FREEZE

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Summary: This adds SoftenFloatRes_FREEZE.

Reviewers: bkramer, JamesNagurne, craig.topper, efriedma

Reviewed By: craig.topper

Subscribers: AbigailLinden, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76980
This commit is contained in:
Juneyoung Lee 2020-03-28 17:38:27 +09:00
parent c18856f48a
commit c4ad402053
3 changed files with 24 additions and 0 deletions
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7
lib/CodeGen/SelectionDAG/LegalizeFloatTypes.cpp
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@ -125,6 +125,7 @@ void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
case ISD::ATOMIC_SWAP: R = BitcastToInt_ATOMIC_SWAP(N); break;
case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
case ISD::FREEZE: R = SoftenFloatRes_FREEZE(N); break;
case ISD::STRICT_SINT_TO_FP:
case ISD::STRICT_UINT_TO_FP:
case ISD::SINT_TO_FP:
@ -184,6 +185,12 @@ SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
return BitConvertToInteger(N->getOperand(0));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_FREEZE(SDNode *N) {
EVT Ty = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
return DAG.getNode(ISD::FREEZE, SDLoc(N), Ty,
GetSoftenedFloat(N->getOperand(0)));
}
SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
unsigned ResNo) {
SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);

1
lib/CodeGen/SelectionDAG/LegalizeTypes.h
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@ -519,6 +519,7 @@ private:
SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
SDValue SoftenFloatRes_FPOW(SDNode *N);
SDValue SoftenFloatRes_FPOWI(SDNode *N);
SDValue SoftenFloatRes_FREEZE(SDNode *N);
SDValue SoftenFloatRes_FREM(SDNode *N);
SDValue SoftenFloatRes_FRINT(SDNode *N);
SDValue SoftenFloatRes_FROUND(SDNode *N);

16
test/CodeGen/ARM/freeze-soften.ll Normal file
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@ -0,0 +1,16 @@
; RUN: llc -mtriple=thumbv8m.main-none-eabi %s -o - | FileCheck %s
; Check that freeze operations on floating types are successfully softened.
; CHECK-LABEL: sitofp_f32_i32:
; CHECK: bl __aeabi_i2f
define float @sitofp_f32_i32(i32 %x) #0 {
%val = call float @llvm.experimental.constrained.sitofp.f32.i32(i32 %x, metadata !"round.tonearest", metadata !"fpexcept.strict") #0
%val.fr = freeze float %val
ret float %val.fr
}
attributes #0 = { strictfp }
declare float @llvm.experimental.constrained.sitofp.f32.i32(i32, metadata, metadata)
declare double @llvm.experimental.constrained.sitofp.f64.i32(i32, metadata, metadata)