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79375edeb2
Summary: rL297171 introduced G_FNEG for floating-point negation instruction and IRTranslator started to translate `FSUB -0.0, X` to `FNEG X`. This patch adds a default action for G_FNEG to avoid breaking existing targets. Reviewers: qcolombet, ab, kristof.beyls, t.p.northover, aditya_nandakumar, dsanders Reviewed By: qcolombet Subscribers: dberris, rovka, llvm-commits Differential Revision: https://reviews.llvm.org/D30721 llvm-svn: 297301
49 lines
1.2 KiB
YAML
49 lines
1.2 KiB
YAML
# RUN: llc -O0 -run-pass=legalizer -global-isel %s -o - | FileCheck %s
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--- |
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64--"
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define void @test_fneg_f32() {
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entry:
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ret void
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}
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define void @test_fneg_f64() {
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entry:
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ret void
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}
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...
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---
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name: test_fneg_f32
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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body: |
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bb.1:
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liveins: %s0
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; CHECK-LABEL: name: test_fneg_f32
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; CHECK: [[VAR:%[0-9]+]](s32) = COPY %s0
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; CHECK: [[ZERO:%[0-9]+]](s32) = G_FCONSTANT float -0.000000e+00
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; CHECK: [[RES:%[0-9]+]](s32) = G_FSUB [[ZERO]], [[VAR]]
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; CHECK: %s0 = COPY [[RES]](s32)
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%0(s32) = COPY %s0
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%1(s32) = G_FNEG %0
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%s0 = COPY %1(s32)
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...
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---
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name: test_fneg_f64
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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body: |
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bb.1:
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liveins: %d0
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; CHECK-LABEL: name: test_fneg_f64
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; CHECK: [[VAR:%[0-9]+]](s64) = COPY %d0
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; CHECK: [[ZERO:%[0-9]+]](s64) = G_FCONSTANT double -0.000000e+00
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; CHECK: [[RES:%[0-9]+]](s64) = G_FSUB [[ZERO]], [[VAR]]
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; CHECK: %d0 = COPY [[RES]](s64)
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%0(s64) = COPY %d0
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%1(s64) = G_FNEG %0
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%d0 = COPY %1(s64)
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...
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