[llvm] 499c90a - [InstSimplify] add more tests for fcmp+select; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 4 04:38:20 PST 2019
Author: Sanjay Patel
Date: 2019-11-04T07:38:11-05:00
New Revision: 499c90afe9099ff700ca8c8f44a2cbf94b1dd627
URL: https://github.com/llvm/llvm-project/commit/499c90afe9099ff700ca8c8f44a2cbf94b1dd627
DIFF: https://github.com/llvm/llvm-project/commit/499c90afe9099ff700ca8c8f44a2cbf94b1dd627.diff
LOG: [InstSimplify] add more tests for fcmp+select; NFC
The addition of FMF for select allows more folding for these
kinds of patterns.
Added:
Modified:
llvm/test/Transforms/InstSimplify/fcmp-select.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstSimplify/fcmp-select.ll b/llvm/test/Transforms/InstSimplify/fcmp-select.ll
index eae885c8471f..cea28639898a 100644
--- a/llvm/test/Transforms/InstSimplify/fcmp-select.ll
+++ b/llvm/test/Transforms/InstSimplify/fcmp-select.ll
@@ -48,6 +48,162 @@ define double @une_swapped(double %x) {
ret double %cond
}
+; X == 0.0 ? X : 0.0 --> ? (X could be -0.0)
+
+define double @oeq_zero(double %x) {
+; CHECK-LABEL: @oeq_zero(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double 0.000000e+00
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp oeq double %x, 0.0
+ %cond = select i1 %cmp, double %x, double 0.0
+ ret double %cond
+}
+
+; X == 0.0 ? 0.0 : X --> ? (change sign if X is -0.0)
+
+define float @oeq_zero_swapped(float %x) {
+; CHECK-LABEL: @oeq_zero_swapped(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], float 0.000000e+00, float [[X]]
+; CHECK-NEXT: ret float [[COND]]
+;
+ %cmp = fcmp oeq float %x, 0.0
+ %cond = select i1 %cmp, float 0.0, float %x
+ ret float %cond
+}
+
+; X != 0.0 ? X : -0.0 --> ? (change sign if X is 0.0)
+
+define double @une_zero(double %x) {
+; CHECK-LABEL: @une_zero(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double [[X]], double -0.000000e+00
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp une double %x, 0.0
+ %cond = select i1 %cmp, double %x, double -0.0
+ ret double %cond
+}
+
+; X != 0.0 ? -0.0 : X --> ? (X could be 0.0)
+
+define double @une_zero_swapped(double %x) {
+; CHECK-LABEL: @une_zero_swapped(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP]], double -0.000000e+00, double [[X]]
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp une double %x, 0.0
+ %cond = select i1 %cmp, double -0.0, double %x
+ ret double %cond
+}
+
+; X == 0.0 ? X : 0.0 --> 0.0
+
+define double @oeq_zero_nsz(double %x) {
+; CHECK-LABEL: @oeq_zero_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select nsz i1 [[CMP]], double [[X]], double 0.000000e+00
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp oeq double %x, 0.0
+ %cond = select nsz i1 %cmp, double %x, double 0.0
+ ret double %cond
+}
+
+; X == 0.0 ? 0.0 : X --> X
+
+define float @oeq_zero_swapped_nsz(float %x) {
+; CHECK-LABEL: @oeq_zero_swapped_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select fast i1 [[CMP]], float 0.000000e+00, float [[X]]
+; CHECK-NEXT: ret float [[COND]]
+;
+ %cmp = fcmp oeq float %x, 0.0
+ %cond = select fast i1 %cmp, float 0.0, float %x
+ ret float %cond
+}
+
+; X != 0.0 ? X : -0.0 --> X
+
+define double @une_zero_nsz(double %x) {
+; CHECK-LABEL: @une_zero_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00
+; CHECK-NEXT: [[COND:%.*]] = select ninf nsz i1 [[CMP]], double [[X]], double -0.000000e+00
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp une double %x, 0.0
+ %cond = select nsz ninf i1 %cmp, double %x, double -0.0
+ ret double %cond
+}
+
+; X != 0.0 ? -0.0 : X --> 0.0
+
+define <2 x double> @une_zero_swapped_nsz(<2 x double> %x) {
+; CHECK-LABEL: @une_zero_swapped_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une <2 x double> [[X:%.*]], <double -0.000000e+00, double 0.000000e+00>
+; CHECK-NEXT: [[COND:%.*]] = select nsz <2 x i1> [[CMP]], <2 x double> <double 0.000000e+00, double -0.000000e+00>, <2 x double> [[X]]
+; CHECK-NEXT: ret <2 x double> [[COND]]
+;
+ %cmp = fcmp une <2 x double> %x, <double -0.0, double 0.0>
+ %cond = select nsz <2 x i1> %cmp, <2 x double> <double 0.0, double -0.0>, <2 x double> %x
+ ret <2 x double> %cond
+}
+
+; X == Y ? X : Y --> Y
+
+define double @oeq_nsz(double %x, double %y) {
+; CHECK-LABEL: @oeq_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[COND:%.*]] = select fast i1 [[CMP]], double [[X]], double [[Y]]
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp oeq double %x, %y
+ %cond = select fast i1 %cmp, double %x, double %y
+ ret double %cond
+}
+
+; X == Y ? Y : X --> X
+
+define <2 x float> @oeq_swapped_nsz(<2 x float> %x, <2 x float> %y) {
+; CHECK-LABEL: @oeq_swapped_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq <2 x float> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[COND:%.*]] = select nnan nsz <2 x i1> [[CMP]], <2 x float> [[Y]], <2 x float> [[X]]
+; CHECK-NEXT: ret <2 x float> [[COND]]
+;
+ %cmp = fcmp oeq <2 x float> %x, %y
+ %cond = select nsz nnan <2 x i1> %cmp, <2 x float> %y, <2 x float> %x
+ ret <2 x float> %cond
+}
+
+; X != Y ? X : Y --> X
+
+define double @une_nsz(double %x, double %y) {
+; CHECK-LABEL: @une_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[COND:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[Y]]
+; CHECK-NEXT: ret double [[COND]]
+;
+ %cmp = fcmp une double %x, %y
+ %cond = select nsz i1 %cmp, double %x, double %y
+ ret double %cond
+}
+
+; X != Y ? Y : X --> Y
+
+define <2 x double> @une_swapped_nsz(<2 x double> %x, <2 x double> %y) {
+; CHECK-LABEL: @une_swapped_nsz(
+; CHECK-NEXT: [[CMP:%.*]] = fcmp une <2 x double> [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[COND:%.*]] = select fast <2 x i1> [[CMP]], <2 x double> [[Y]], <2 x double> [[X]]
+; CHECK-NEXT: ret <2 x double> [[COND]]
+;
+ %cmp = fcmp une <2 x double> %x, %y
+ %cond = select fast <2 x i1> %cmp, <2 x double> %y, <2 x double> %x
+ ret <2 x double> %cond
+}
+
define double @une_could_be_negzero(double %x, double %y) {
; CHECK-LABEL: @une_could_be_negzero(
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]
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