1127662c6d
getNode handling for ISD:SETCC calls FoldSETCC which can canonicalize FP constants to the RHS. When this happens we should create the node with the FMF that was requested. By using FlagInserter when can ensure any calls to getNode/getSetcc during canonicalization will also get the flags. Differential Revision: https://reviews.llvm.org/D88063
47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc -mtriple=x86_64-unknown-unknown -debug-only=isel < %s -o /dev/null 2>&1 | FileCheck %s
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; This tests the propagation of fast-math-flags from IR instructions to SDNodeFlags.
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; CHECK-LABEL: Initial selection DAG: %bb.0 'fmf_transfer:'
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; CHECK: t5: f32 = fadd nsz t2, t4
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; CHECK-NEXT: t6: f32 = fadd arcp t5, t4
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; CHECK-NEXT: t7: f32 = fadd nnan t6, t4
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; CHECK-NEXT: t8: f32 = fadd ninf t7, t4
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; CHECK-NEXT: t9: f32 = fadd contract t8, t4
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; CHECK-NEXT: t10: f32 = fadd afn t9, t4
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; CHECK-NEXT: t11: f32 = fadd reassoc t10, t4
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; CHECK-NEXT: t12: f32 = fadd nnan ninf nsz arcp contract afn reassoc t11, t4
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; CHECK: Optimized lowered selection DAG: %bb.0 'fmf_transfer:'
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define float @fmf_transfer(float %x, float %y) {
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%f1 = fadd nsz float %x, %y
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%f2 = fadd arcp float %f1, %y
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%f3 = fadd nnan float %f2, %y
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%f4 = fadd ninf float %f3, %y
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%f5 = fadd contract float %f4, %y
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%f6 = fadd afn float %f5, %y
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%f7 = fadd reassoc float %f6, %y
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%f8 = fadd fast float %f7, %y
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ret float %f8
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}
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; CHECK-LABEL: Optimized type-legalized selection DAG: %bb.0 'fmf_setcc:'
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; CHECK: t13: i8 = setcc nnan ninf nsz arcp contract afn reassoc t2, ConstantFP:f32<0.000000e+00>, setlt:ch
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define float @fmf_setcc(float %x, float %y) {
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%cmp = fcmp fast ult float %x, 0.0
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%ret = select i1 %cmp, float %x, float %y
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ret float %ret
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}
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; CHECK-LABEL: Initial selection DAG: %bb.0 'fmf_setcc_canon:'
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; CHECK: t14: i8 = setcc nnan ninf nsz arcp contract afn reassoc t2, ConstantFP:f32<0.000000e+00>, setgt:ch
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define float @fmf_setcc_canon(float %x, float %y) {
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%cmp = fcmp fast ult float 0.0, %x
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%ret = select i1 %cmp, float %x, float %y
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ret float %ret
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}
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