[llvm] [InstSimplify] Add constant folding support for `ucmp`/`scmp` intrinsics (PR #93730)

[via llvm-commits]

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@@ -0,0 +1,82 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
+
+define i8 @scmp_lt() {
+; CHECK-LABEL: define i8 @scmp_lt() {
+; CHECK-NEXT:    ret i8 -1
+;
+  %1 = call i8 @llvm.scmp(i32 -7, i32 3)
+  ret i8 %1
+}
+
+define i8 @scmp_eq() {
+; CHECK-LABEL: define i8 @scmp_eq() {
+; CHECK-NEXT:    ret i8 0
+;
+  %1 = call i8 @llvm.scmp(i32 2, i32 2)
+  ret i8 %1
+}
+
+define i8 @scmp_gt() {
+; CHECK-LABEL: define i8 @scmp_gt() {
+; CHECK-NEXT:    ret i8 1
+;
+  %1 = call i8 @llvm.scmp(i32 2, i32 -7)
+  ret i8 %1
+}
+
+define i8 @ucmp_lt() {
+; CHECK-LABEL: define i8 @ucmp_lt() {
+; CHECK-NEXT:    ret i8 -1
+;
+  %1 = call i8 @llvm.ucmp(i32 7, i32 12)
+  ret i8 %1
+}
+
+define i2 @ucmp_eq() {
+; CHECK-LABEL: define i2 @ucmp_eq() {
+; CHECK-NEXT:    ret i2 0
+;
+  %1 = call i2 @llvm.ucmp(i32 12, i32 12)
+  ret i2 %1
+}
+
+define i100 @ucmp_gt() {
+; CHECK-LABEL: define i100 @ucmp_gt() {
+; CHECK-NEXT:    ret i100 1
+;
+  %1 = call i100 @llvm.ucmp(i32 7, i32 3)
+  ret i100 %1
+}
+
+define i8 @ucmp_poison() {
+; CHECK-LABEL: define i8 @ucmp_poison() {
+; CHECK-NEXT:    ret i8 poison
+;
+  %1 = call i8 @llvm.ucmp(i32 poison, i32 5)
+  ret i8 %1
+}
+
+define i8 @scmp_undef() {
+; CHECK-LABEL: define i8 @scmp_undef() {
+; CHECK-NEXT:    ret i8 0
+;
+  %1 = call i8 @llvm.scmp(i32 undef, i32 -12)
+  ret i8 %1
+}
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Poseydon42 wrote:

Added those.

https://github.com/llvm/llvm-project/pull/93730