[llvm] 560dd1c - [NFC][Instcombine] Pre-commit some tests for negative fabs
Usman Nadeem via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 26 10:23:50 PDT 2021
Author: Usman Nadeem
Date: 2021-10-26T10:23:39-07:00
New Revision: 560dd1cdada29b73cb9482f8386679508ed7d01b
URL: https://github.com/llvm/llvm-project/commit/560dd1cdada29b73cb9482f8386679508ed7d01b
DIFF: https://github.com/llvm/llvm-project/commit/560dd1cdada29b73cb9482f8386679508ed7d01b.diff
LOG: [NFC][Instcombine] Pre-commit some tests for negative fabs
Change-Id: Idcce321c825ecc6b3a111a683e24dc10015f6872
Added:
llvm/test/Transforms/InstCombine/fneg-fabs.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/fneg-fabs.ll b/llvm/test/Transforms/InstCombine/fneg-fabs.ll
new file mode 100644
index 000000000000..cb2e440dbbc8
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/fneg-fabs.ll
@@ -0,0 +1,238 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; (X < +/-0.0) ? X : -X --> -fabs(X)
+; (X <= +/-0.0) ? X : -X --> -fabs(X)
+; One negative test with no fmf
+define double @select_noFMF_nfabs_lt(double %x) {
+; CHECK-LABEL: @select_noFMF_nfabs_lt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp olt double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+; One test where the neg has fmfs.
+define double @select_nsz_nfabs_lt_fmfProp(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_lt_fmfProp(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg fast double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp olt double %x, 0.000000e+00
+ %negX = fneg fast double %x
+ %sel = select nsz i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+; Tests with various predicate types.
+define double @select_nsz_nfabs_olt(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_olt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp olt double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_ult(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_ult(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ult double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ult double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_ole(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_ole(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ole double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ole double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_ule(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_ule(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ule double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ule double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %x, double %negX
+ ret double %sel
+}
+
+; (X > +/-0.0) ? -X : X --> -fabs(X)
+; (X >= +/-0.0) ? -X : X --> -fabs(X)
+; One negative test with no fmf
+define double @select_noFMF_nfabs_gt(double %x) {
+; CHECK-LABEL: @select_noFMF_nfabs_gt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ogt double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+; One test where the neg has fmfs.
+define double @select_nsz_nfabs_gt_fmfProp(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_gt_fmfProp(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg fast double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ogt double %x, 0.000000e+00
+ %negX = fneg fast double %x
+ %sel = select nsz i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+; Tests with various predicate types.
+define double @select_nsz_nfabs_ogt(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_ogt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ogt double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_ugt(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_ugt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ugt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp ugt double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_oge(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_oge(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oge double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp oge double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+define double @select_nsz_nfabs_uge(double %x) {
+; CHECK-LABEL: @select_nsz_nfabs_uge(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp uge double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg double [[X]]
+; CHECK-NEXT: [[SEL:%.*]] = select nsz i1 [[CMP]], double [[NEGX]], double [[X]]
+; CHECK-NEXT: ret double [[SEL]]
+;
+ %cmp = fcmp uge double %x, 0.000000e+00
+ %negX = fneg double %x
+ %sel = select nsz i1 %cmp, double %negX, double %x
+ ret double %sel
+}
+
+; (X < +/-0.0) ? X : (0.0 - X) --> (0.0 - fabs(X))
+; One negative test with <=.
+define double @select_noFMF_fsubfabs_le(double %x) {
+; CHECK-LABEL: @select_noFMF_fsubfabs_le(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ole double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[SUB:%.*]] = fsub double 0.000000e+00, [[X]]
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP]], double [[X]], double [[SUB]]
+; CHECK-NEXT: ret double [[RETVAL_0]]
+;
+ %cmp = fcmp ole double %x, 0.000000e+00
+ %sub = fsub double 0.000000e+00, %x
+ %retval.0 = select i1 %cmp, double %x, double %sub
+ ret double %retval.0
+}
+
+define double @select_noFMF_fsubfabs_olt(double %x) {
+; CHECK-LABEL: @select_noFMF_fsubfabs_olt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[SUB:%.*]] = fsub double 0.000000e+00, [[X]]
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP]], double [[X]], double [[SUB]]
+; CHECK-NEXT: ret double [[RETVAL_0]]
+;
+ %cmp = fcmp olt double %x, 0.000000e+00
+ %sub = fsub double 0.000000e+00, %x
+ %retval.0 = select i1 %cmp, double %x, double %sub
+ ret double %retval.0
+}
+
+define double @select_noFMF_fsubfabs_ult(double %x) {
+; CHECK-LABEL: @select_noFMF_fsubfabs_ult(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ult double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[SUB:%.*]] = fsub double 0.000000e+00, [[X]]
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP]], double [[X]], double [[SUB]]
+; CHECK-NEXT: ret double [[RETVAL_0]]
+;
+ %cmp = fcmp ult double %x, 0.000000e+00
+ %sub = fsub double 0.000000e+00, %x
+ %retval.0 = select i1 %cmp, double %x, double %sub
+ ret double %retval.0
+}
+
+
+; With nsz:
+; (X < +/-0.0) ? X : -X --> -fabs(X)
+define double @select_nsz_fnegfabs_olt(double %x) {
+; CHECK-LABEL: @select_nsz_fnegfabs_olt(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp olt double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg nsz double [[X]]
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[RETVAL_0]]
+;
+ %cmp = fcmp olt double %x, 0.000000e+00
+ %negX = fneg nsz double %x
+ %retval.0 = select i1 %cmp, double %x, double %negX
+ ret double %retval.0
+}
+
+define double @select_nsz_fnegfabs_ult(double %x) {
+; CHECK-LABEL: @select_nsz_fnegfabs_ult(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp ult double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[NEGX:%.*]] = fneg nsz double [[X]]
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP]], double [[X]], double [[NEGX]]
+; CHECK-NEXT: ret double [[RETVAL_0]]
+;
+ %cmp = fcmp ult double %x, 0.000000e+00
+ %negX = fneg nsz double %x
+ %retval.0 = select i1 %cmp, double %x, double %negX
+ ret double %retval.0
+}
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