[llvm] 1667fbe - [InstCombine] add test with multiple uses of min/max negated operand; NFC

[Sanjay Patel via llvm-commits]

Author: Sanjay Patel
Date: 2021-04-09T10:34:02-04:00
New Revision: 1667fbe65082a1daf757d090bd57450b4e595db4

URL: https://github.com/llvm/llvm-project/commit/1667fbe65082a1daf757d090bd57450b4e595db4
DIFF: https://github.com/llvm/llvm-project/commit/1667fbe65082a1daf757d090bd57450b4e595db4.diff

LOG: [InstCombine] add test with multiple uses of min/max negated operand; NFC

Added: 
    

Modified: 
    llvm/test/Transforms/InstCombine/minmax-intrinsics.ll

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll b/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
index 3d6d3e333b2bf..62800424df70e 100644
--- a/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
+++ b/llvm/test/Transforms/InstCombine/minmax-intrinsics.ll
@@ -689,3 +689,18 @@ define i8 @umin_negation(i8 %x) {
   %r = call i8 @llvm.umin.i8(i8 %s, i8 %x)
   ret i8 %r
 }
+
+define i8 @smax_negation_uses(i8 %x, i8 %y) {
+; CHECK-LABEL: @smax_negation_uses(
+; CHECK-NEXT:    [[S1:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT:    [[S2:%.*]] = sub i8 [[Y]], [[X]]
+; CHECK-NEXT:    call void @use(i8 [[S2]])
+; CHECK-NEXT:    [[TMP1:%.*]] = call i8 @llvm.abs.i8(i8 [[S1]], i1 false)
+; CHECK-NEXT:    ret i8 [[TMP1]]
+;
+  %s1 = sub i8 %x, %y
+  %s2 = sub i8 %y, %x
+  call void @use(i8 %s2)
+  %r = call i8 @llvm.smax.i8(i8 %s1, i8 %s2)
+  ret i8 %r
+}