derek.holloway
7502bf64a4
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112 lines
3.4 KiB
LLVM
112 lines
3.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes=instcombine < %s | FileCheck %s
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; Show that unlike fadd, fmul does not require nsz to be reassociated.
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; Can't reassociate anyway
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define float @fmul(float %x) {
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; CHECK-LABEL: define float @fmul(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL0:%.*]] = fmul float [[X]], 2.000000e+00
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul float [[FMUL0]], 4.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul float %x, 2.0
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%fmul1 = fmul float %fmul0, 4.0
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ret float %fmul1
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}
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; Should be able to reassociate without nsz
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; (+0 * 2) * 4 = +0
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; (-0 * 2) * 4 = -0
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; (+0 * 8) = +0
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; (-0 * 8) = -0
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define float @fmul_reassoc(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc float [[X]], 8.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul reassoc float %x, 2.0
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%fmul1 = fmul reassoc float %fmul0, 4.0
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ret float %fmul1
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}
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define <2 x float> @fmul_reassoc_v2(<2 x float> %x) {
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; CHECK-LABEL: define <2 x float> @fmul_reassoc_v2(
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; CHECK-SAME: <2 x float> [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc <2 x float> [[X]], splat (float 8.000000e+00)
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; CHECK-NEXT: ret <2 x float> [[FMUL1]]
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;
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%fmul0 = fmul reassoc <2 x float> %x, splat (float 2.0)
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%fmul1 = fmul reassoc <2 x float> %fmul0, splat (float 4.0)
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ret <2 x float> %fmul1
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}
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; (+0 * 2) * -4 = -0
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; (-0 * 2) * -4 = +0
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; (+0 * -8) = -0
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; (-0 * -8) = +0
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define float @fmul_reassoc_negative_0(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc_negative_0(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc float [[X]], -8.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul reassoc float %x, 2.0
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%fmul1 = fmul reassoc float %fmul0, -4.0
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ret float %fmul1
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}
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; (+0 * -2) * 4 = -0
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; (-0 * -2) * 4 = +0
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; (+0 * -8) = -0
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; (-0 * -8) = +0
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define float @fmul_reassoc_negative_1(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc_negative_1(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc float [[X]], -8.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul reassoc float %x, -2.0
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%fmul1 = fmul reassoc float %fmul0, 4.0
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ret float %fmul1
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}
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; Does reassociate already, unnecessarily requires nsz on both multiplies.
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define float @fmul_reassoc_nsz(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc_nsz(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc nsz float [[X]], 8.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul nsz reassoc float %x, 2.0
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%fmul1 = fmul nsz reassoc float %fmul0, 4.0
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ret float %fmul1
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}
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define float @fmul_reassoc_posk_neg0(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc_posk_neg0(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL1:%.*]] = fmul reassoc float [[X]], -0.000000e+00
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; CHECK-NEXT: ret float [[FMUL1]]
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;
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%fmul0 = fmul reassoc float %x, 4.0
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%fmul1 = fmul reassoc float %fmul0, -0.0
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ret float %fmul1
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}
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define float @fmul_reassoc_neg0_posk(float %x) {
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; CHECK-LABEL: define float @fmul_reassoc_neg0_posk(
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; CHECK-SAME: float [[X:%.*]]) {
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; CHECK-NEXT: [[FMUL0:%.*]] = fmul reassoc float [[X]], -0.000000e+00
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; CHECK-NEXT: ret float [[FMUL0]]
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;
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%fmul0 = fmul reassoc float %x, -0.0
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%fmul1 = fmul reassoc float %fmul0, 4.0
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ret float %fmul1
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}
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