[llvm] 3ac2541 - [CVP] Add test for and of min (NFC)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2021-04-04T11:11:01+02:00
New Revision: 3ac2541b5c31fd13fa60e7b0692b7f9bf4a41733

URL: https://github.com/llvm/llvm-project/commit/3ac2541b5c31fd13fa60e7b0692b7f9bf4a41733
DIFF: https://github.com/llvm/llvm-project/commit/3ac2541b5c31fd13fa60e7b0692b7f9bf4a41733.diff

LOG: [CVP] Add test for and of min (NFC)

The and currently doesn't get optimized away because %a is
overdefined.

Added: 
    

Modified: 
    llvm/test/Transforms/CorrelatedValuePropagation/and.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/CorrelatedValuePropagation/and.ll b/llvm/test/Transforms/CorrelatedValuePropagation/and.ll
index 475824420ab7..0fd2955d6262 100644
--- a/llvm/test/Transforms/CorrelatedValuePropagation/and.ll
+++ b/llvm/test/Transforms/CorrelatedValuePropagation/and.ll
@@ -125,3 +125,28 @@ exit:
   ret i32 -1
 }
 
+define i32 @min_and(i32 %a) {
+; CHECK-LABEL: @min_and(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 127
+; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[CMP]], i32 [[A]], i32 127
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[SEL]], 127
+; CHECK-NEXT:    ret i32 [[AND]]
+;
+  %cmp = icmp ult i32 %a, 127
+  %sel = select i1 %cmp, i32 %a, i32 127
+  %and = and i32 %sel, 127
+  ret i32 %and
+}
+
+define i32 @min_and_comm(i32 %a) {
+; CHECK-LABEL: @min_and_comm(
+; CHECK-NEXT:    [[CMP:%.*]] = icmp uge i32 [[A:%.*]], 127
+; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[CMP]], i32 127, i32 [[A]]
+; CHECK-NEXT:    [[AND:%.*]] = and i32 [[SEL]], 127
+; CHECK-NEXT:    ret i32 [[AND]]
+;
+  %cmp = icmp uge i32 %a, 127
+  %sel = select i1 %cmp, i32 127, i32 %a
+  %and = and i32 %sel, 127
+  ret i32 %and
+}