[llvm] r367222 - [InstCombine] add tests for fadd with negated operand; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Mon Jul 29 05:49:36 PDT 2019
Author: spatel
Date: Mon Jul 29 05:49:36 2019
New Revision: 367222
URL: http://llvm.org/viewvc/llvm-project?rev=367222&view=rev
Log:
[InstCombine] add tests for fadd with negated operand; NFC
Modified:
llvm/trunk/test/Transforms/InstCombine/fadd.ll
Modified: llvm/trunk/test/Transforms/InstCombine/fadd.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/fadd.ll?rev=367222&r1=367221&r2=367222&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/fadd.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/fadd.ll Mon Jul 29 05:49:36 2019
@@ -1,6 +1,9 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
+declare void @use(float)
+declare void @use_vec(<2 x float>)
+
; -x + y => y - x
define float @fneg_op0(float %x, float %y) {
@@ -25,3 +28,362 @@ define float @fneg_op1(float %x, float %
ret float %add
}
+; Z + (-X / Y) --> Z - (X / Y)
+
+define double @fdiv_fneg1(double %x, double %y, double %pz) {
+; CHECK-LABEL: @fdiv_fneg1(
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %div = fdiv double %neg, %y
+ %r = fadd double %z, %div
+ ret double %r
+}
+
+; Z + (Y / -X) --> Z - (Y / X)
+
+define <2 x double> @fdiv_fneg2(<2 x double> %x, <2 x double> %y, <2 x double> %pz) {
+; CHECK-LABEL: @fdiv_fneg2(
+; CHECK-NEXT: [[Z:%.*]] = frem <2 x double> <double 4.200000e+01, double 8.000000e+00>, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv <2 x double> [[Y:%.*]], [[X:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub <2 x double> [[Z]], [[TMP1]]
+; CHECK-NEXT: ret <2 x double> [[R]]
+;
+ %z = frem <2 x double> <double 42.0, double 8.0>, %pz ; thwart complexity-based canonicalization
+ %neg = fsub <2 x double> <double -0.0, double -0.0>, %x
+ %div = fdiv <2 x double> %y, %neg
+ %r = fadd <2 x double> %z, %div
+ ret <2 x double> %r
+}
+
+; Z + (-X * Y) --> Z - (X * Y)
+
+define double @fmul_fneg1(double %x, double %y, double %pz) {
+; CHECK-LABEL: @fmul_fneg1(
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %mul = fmul double %neg, %y
+ %r = fadd double %z, %mul
+ ret double %r
+}
+
+; Z + (Y * -X) --> Z - (Y * X)
+
+define double @fmul_fneg2(double %x, double %py, double %pz) {
+; CHECK-LABEL: @fmul_fneg2(
+; CHECK-NEXT: [[Y:%.*]] = frem double -4.200000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[Y]], [[X:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %y = frem double -42.0, %py ; thwart complexity-based canonicalization
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %mul = fmul double %y, %neg
+ %r = fadd double %z, %mul
+ ret double %r
+}
+
+; (-X / Y) + Z --> Z - (X / Y)
+
+define double @fdiv_fneg1_commute(double %x, double %y, double %pz) {
+; CHECK-LABEL: @fdiv_fneg1_commute(
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %div = fdiv double %neg, %y
+ %r = fadd double %div, %z
+ ret double %r
+}
+
+; (Y / -X) + Z --> Z - (Y / X)
+
+define <2 x double> @fdiv_fneg2_commute(<2 x double> %x, <2 x double> %y, <2 x double> %pz) {
+; CHECK-LABEL: @fdiv_fneg2_commute(
+; CHECK-NEXT: [[Z:%.*]] = frem <2 x double> <double 4.200000e+01, double 8.000000e+00>, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv <2 x double> [[Y:%.*]], [[X:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub <2 x double> [[Z]], [[TMP1]]
+; CHECK-NEXT: ret <2 x double> [[R]]
+;
+ %z = frem <2 x double> <double 42.0, double 8.0>, %pz ; thwart complexity-based canonicalization
+ %neg = fsub <2 x double> <double -0.0, double -0.0>, %x
+ %div = fdiv <2 x double> %y, %neg
+ %r = fadd <2 x double> %div, %z
+ ret <2 x double> %r
+}
+
+; (-X * Y) + Z --> Z - (X * Y)
+
+define double @fmul_fneg1_commute(double %x, double %y, double %pz) {
+; CHECK-LABEL: @fmul_fneg1_commute(
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %mul = fmul double %neg, %y
+ %r = fadd double %mul, %z
+ ret double %r
+}
+
+; (Y * -X) + Z --> Z - (Y * X)
+
+define double @fmul_fneg2_commute(double %x, double %py, double %pz) {
+; CHECK-LABEL: @fmul_fneg2_commute(
+; CHECK-NEXT: [[Y:%.*]] = frem double 4.100000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[Y]], [[X:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
+; CHECK-NEXT: ret double [[R]]
+;
+ %y = frem double 41.0, %py ; thwart complexity-based canonicalization
+ %z = frem double 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub double -0.000000e+00, %x
+ %mul = fmul double %y, %neg
+ %r = fadd double %mul, %z
+ ret double %r
+}
+
+; Z + (-X / Y) --> Z - (X / Y)
+
+define float @fdiv_fneg1_extra_use(float %x, float %y, float %pz) {
+; CHECK-LABEL: @fdiv_fneg1_extra_use(
+; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv float [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[DIV:%.*]] = fsub float -0.000000e+00, [[TMP1]]
+; CHECK-NEXT: call void @use(float [[DIV]])
+; CHECK-NEXT: [[R:%.*]] = fsub float [[Z]], [[TMP1]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %z = frem float 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub float -0.000000e+00, %x
+ %div = fdiv float %neg, %y
+ call void @use(float %div)
+ %r = fadd float %z, %div
+ ret float %r
+}
+
+; Z + (Y / -X) --> Z - (Y / X)
+
+define float @fdiv_fneg2_extra_use(float %x, float %py, float %pz) {
+; CHECK-LABEL: @fdiv_fneg2_extra_use(
+; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fdiv float [[Y]], [[X:%.*]]
+; CHECK-NEXT: [[DIV:%.*]] = fsub float -0.000000e+00, [[TMP1]]
+; CHECK-NEXT: call void @use(float [[DIV]])
+; CHECK-NEXT: [[R:%.*]] = fsub float [[Z]], [[TMP1]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %y = frem float -42.0, %py ; thwart complexity-based canonicalization
+ %z = frem float 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub float -0.000000e+00, %x
+ %div = fdiv float %y, %neg
+ call void @use(float %div)
+ %r = fadd float %z, %div
+ ret float %r
+}
+
+; Z + (-X * Y) --> Z - (X * Y)
+
+define <2 x float> @fmul_fneg1_extra_use(<2 x float> %x, <2 x float> %y, <2 x float> %pz) {
+; CHECK-LABEL: @fmul_fneg1_extra_use(
+; CHECK-NEXT: [[Z:%.*]] = frem <2 x float> <float 4.200000e+01, float -1.000000e+00>, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul <2 x float> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[MUL:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[TMP1]]
+; CHECK-NEXT: call void @use_vec(<2 x float> [[MUL]])
+; CHECK-NEXT: [[R:%.*]] = fsub <2 x float> [[Z]], [[TMP1]]
+; CHECK-NEXT: ret <2 x float> [[R]]
+;
+ %z = frem <2 x float> <float 42.0, float -1.0>, %pz ; thwart complexity-based canonicalization
+ %neg = fsub <2 x float> <float -0.0, float -0.0>, %x
+ %mul = fmul <2 x float> %neg, %y
+ call void @use_vec(<2 x float> %mul)
+ %r = fadd <2 x float> %z, %mul
+ ret <2 x float> %r
+}
+
+; Z + (Y * -X) --> Z - (Y * X)
+
+define float @fmul_fneg2_extra_use(float %x, float %py, float %pz) {
+; CHECK-LABEL: @fmul_fneg2_extra_use(
+; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
+; CHECK-NEXT: [[TMP1:%.*]] = fmul float [[Y]], [[X:%.*]]
+; CHECK-NEXT: [[MUL:%.*]] = fsub float -0.000000e+00, [[TMP1]]
+; CHECK-NEXT: call void @use(float [[MUL]])
+; CHECK-NEXT: [[R:%.*]] = fsub float [[Z]], [[TMP1]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %y = frem float -42.0, %py ; thwart complexity-based canonicalization
+ %z = frem float 42.0, %pz ; thwart complexity-based canonicalization
+ %neg = fsub float -0.000000e+00, %x
+ %mul = fmul float %y, %neg
+ call void @use(float %mul)
+ %r = fadd float %z, %mul
+ ret float %r
+}
+
+; (-X / Y) + Z --> Z - (X / Y)
+
+define float @fdiv_fneg1_extra_use2(float %x, float %y, float %z) {
+; CHECK-LABEL: @fdiv_fneg1_extra_use2(
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[NEG]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %div = fdiv float %neg, %y
+ %r = fadd float %div, %z
+ ret float %r
+}
+
+; (Y / -X) + Z --> Z - (Y / X)
+
+define float @fdiv_fneg2_extra_use2(float %x, float %y, float %z) {
+; CHECK-LABEL: @fdiv_fneg2_extra_use2(
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[Y:%.*]], [[NEG]]
+; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %div = fdiv float %y, %neg
+ %r = fadd float %div, %z
+ ret float %r
+}
+
+; (-X * Y) + Z --> Z - (X * Y)
+
+define <2 x float> @fmul_fneg1_extra_use2(<2 x float> %x, <2 x float> %y, <2 x float> %z) {
+; CHECK-LABEL: @fmul_fneg1_extra_use2(
+; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X:%.*]]
+; CHECK-NEXT: call void @use_vec(<2 x float> [[NEG]])
+; CHECK-NEXT: [[MUL:%.*]] = fmul <2 x float> [[NEG]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = fadd <2 x float> [[MUL]], [[Z:%.*]]
+; CHECK-NEXT: ret <2 x float> [[R]]
+;
+ %neg = fsub <2 x float> <float -0.0, float -0.0>, %x
+ call void @use_vec(<2 x float> %neg)
+ %mul = fmul <2 x float> %neg, %y
+ %r = fadd <2 x float> %mul, %z
+ ret <2 x float> %r
+}
+
+; (Y * -X) + Z --> Z - (Y * X)
+
+define float @fmul_fneg2_extra_use2(float %x, float %py, float %z) {
+; CHECK-LABEL: @fmul_fneg2_extra_use2(
+; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[MUL:%.*]] = fmul float [[Y]], [[NEG]]
+; CHECK-NEXT: [[R:%.*]] = fadd float [[MUL]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %y = frem float -42.0, %py ; thwart complexity-based canonicalization
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %mul = fmul float %y, %neg
+ %r = fadd float %mul, %z
+ ret float %r
+}
+
+; (-X / Y) + Z --> Z - (X / Y)
+
+define float @fdiv_fneg1_extra_use3(float %x, float %y, float %z) {
+; CHECK-LABEL: @fdiv_fneg1_extra_use3(
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[NEG]], [[Y:%.*]]
+; CHECK-NEXT: call void @use(float [[DIV]])
+; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %div = fdiv float %neg, %y
+ call void @use(float %div)
+ %r = fadd float %div, %z
+ ret float %r
+}
+
+; (Y / -X) + Z --> Z - (Y / X)
+
+define float @fdiv_fneg2_extra_use3(float %x, float %y, float %z) {
+; CHECK-LABEL: @fdiv_fneg2_extra_use3(
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[Y:%.*]], [[NEG]]
+; CHECK-NEXT: call void @use(float [[DIV]])
+; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %div = fdiv float %y, %neg
+ call void @use(float %div)
+ %r = fadd float %div, %z
+ ret float %r
+}
+
+; (-X * Y) + Z --> Z - (X * Y)
+
+define <2 x float> @fmul_fneg1_extra_use3(<2 x float> %x, <2 x float> %y, <2 x float> %z) {
+; CHECK-LABEL: @fmul_fneg1_extra_use3(
+; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X:%.*]]
+; CHECK-NEXT: call void @use_vec(<2 x float> [[NEG]])
+; CHECK-NEXT: [[MUL:%.*]] = fmul <2 x float> [[NEG]], [[Y:%.*]]
+; CHECK-NEXT: call void @use_vec(<2 x float> [[MUL]])
+; CHECK-NEXT: [[R:%.*]] = fadd <2 x float> [[MUL]], [[Z:%.*]]
+; CHECK-NEXT: ret <2 x float> [[R]]
+;
+ %neg = fsub <2 x float> <float -0.0, float -0.0>, %x
+ call void @use_vec(<2 x float> %neg)
+ %mul = fmul <2 x float> %neg, %y
+ call void @use_vec(<2 x float> %mul)
+ %r = fadd <2 x float> %mul, %z
+ ret <2 x float> %r
+}
+
+; (Y * -X) + Z --> Z - (Y * X)
+
+define float @fmul_fneg2_extra_use3(float %x, float %py, float %z) {
+; CHECK-LABEL: @fmul_fneg2_extra_use3(
+; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
+; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
+; CHECK-NEXT: call void @use(float [[NEG]])
+; CHECK-NEXT: [[MUL:%.*]] = fmul float [[Y]], [[NEG]]
+; CHECK-NEXT: call void @use(float [[MUL]])
+; CHECK-NEXT: [[R:%.*]] = fadd float [[MUL]], [[Z:%.*]]
+; CHECK-NEXT: ret float [[R]]
+;
+ %y = frem float -42.0, %py ; thwart complexity-based canonicalization
+ %neg = fsub float -0.000000e+00, %x
+ call void @use(float %neg)
+ %mul = fmul float %y, %neg
+ call void @use(float %mul)
+ %r = fadd float %mul, %z
+ ret float %r
+}
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