[llvm] 5fd8833 - [InstCombine] add tests for X*X == 0; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 15 09:30:20 PDT 2022
Author: Sanjay Patel
Date: 2022-09-15T12:02:50-04:00
New Revision: 5fd883377c046d4b606f0cffa3d4f052ba75acf6
URL: https://github.com/llvm/llvm-project/commit/5fd883377c046d4b606f0cffa3d4f052ba75acf6
DIFF: https://github.com/llvm/llvm-project/commit/5fd883377c046d4b606f0cffa3d4f052ba75acf6.diff
LOG: [InstCombine] add tests for X*X == 0; NFC
Added:
Modified:
llvm/test/Transforms/InstCombine/icmp-mul.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/icmp-mul.ll b/llvm/test/Transforms/InstCombine/icmp-mul.ll
index 65a7fccc8872b..0f8ee5dcf3219 100644
--- a/llvm/test/Transforms/InstCombine/icmp-mul.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-mul.ll
@@ -3,6 +3,85 @@
declare void @use(i8)
+define i1 @squared_nsw_eq0(i5 %x) {
+; CHECK-LABEL: @squared_nsw_eq0(
+; CHECK-NEXT: [[M:%.*]] = mul nsw i5 [[X:%.*]], [[X]]
+; CHECK-NEXT: [[R:%.*]] = icmp eq i5 [[M]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul nsw i5 %x, %x
+ %r = icmp eq i5 %m, 0
+ ret i1 %r
+}
+
+define <2 x i1> @squared_nuw_eq0(<2 x i8> %x) {
+; CHECK-LABEL: @squared_nuw_eq0(
+; CHECK-NEXT: [[M:%.*]] = mul nuw <2 x i8> [[X:%.*]], [[X]]
+; CHECK-NEXT: [[R:%.*]] = icmp eq <2 x i8> [[M]], zeroinitializer
+; CHECK-NEXT: ret <2 x i1> [[R]]
+;
+ %m = mul nuw <2 x i8> %x, %x
+ %r = icmp eq <2 x i8> %m, zeroinitializer
+ ret <2 x i1> %r
+}
+
+define i1 @squared_nsw_nuw_ne0(i8 %x) {
+; CHECK-LABEL: @squared_nsw_nuw_ne0(
+; CHECK-NEXT: [[M:%.*]] = mul nuw nsw i8 [[X:%.*]], [[X]]
+; CHECK-NEXT: call void @use(i8 [[M]])
+; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[M]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul nsw nuw i8 %x, %x
+ call void @use(i8 %m)
+ %r = icmp ne i8 %m, 0
+ ret i1 %r
+}
+
+define i1 @squared_eq0(i8 %x) {
+; CHECK-LABEL: @squared_eq0(
+; CHECK-NEXT: [[M:%.*]] = mul i8 [[X:%.*]], [[X]]
+; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[M]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul i8 %x, %x
+ %r = icmp eq i8 %m, 0
+ ret i1 %r
+}
+
+define i1 @mul_nsw_eq0(i5 %x, i5 %y) {
+; CHECK-LABEL: @mul_nsw_eq0(
+; CHECK-NEXT: [[M:%.*]] = mul nsw i5 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[R:%.*]] = icmp eq i5 [[M]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul nsw i5 %x, %y
+ %r = icmp eq i5 %m, 0
+ ret i1 %r
+}
+
+define i1 @squared_nsw_eq1(i5 %x) {
+; CHECK-LABEL: @squared_nsw_eq1(
+; CHECK-NEXT: [[M:%.*]] = mul nsw i5 [[X:%.*]], [[X]]
+; CHECK-NEXT: [[R:%.*]] = icmp eq i5 [[M]], 1
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul nsw i5 %x, %x
+ %r = icmp eq i5 %m, 1
+ ret i1 %r
+}
+
+define i1 @squared_nsw_sgt0(i5 %x) {
+; CHECK-LABEL: @squared_nsw_sgt0(
+; CHECK-NEXT: [[M:%.*]] = mul nsw i5 [[X:%.*]], [[X]]
+; CHECK-NEXT: [[R:%.*]] = icmp ne i5 [[M]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %m = mul nsw i5 %x, %x
+ %r = icmp sgt i5 %m, 0
+ ret i1 %r
+}
+
; Tests for slt/ult
define i1 @slt_positive_multip_rem_zero(i8 %x) {
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