[llvm] 94a703e - ValueTracking: Add test for fneg isKnownNeverNaN handling

[Matt Arsenault via llvm-commits]

Author: Matt Arsenault
Date: 2022-12-22T09:38:14-05:00
New Revision: 94a703ecdcf1264dcec7aa53f64f461665b17a2e

URL: https://github.com/llvm/llvm-project/commit/94a703ecdcf1264dcec7aa53f64f461665b17a2e
DIFF: https://github.com/llvm/llvm-project/commit/94a703ecdcf1264dcec7aa53f64f461665b17a2e.diff

LOG: ValueTracking: Add test for fneg isKnownNeverNaN handling

This didn't have a negative test.

Added: 
    

Modified: 
    llvm/test/Transforms/InstSimplify/known-never-nan.ll

Removed: 
    


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diff  --git a/llvm/test/Transforms/InstSimplify/known-never-nan.ll b/llvm/test/Transforms/InstSimplify/known-never-nan.ll
index e9114bb19d6e2..bf81a8a1ed6b5 100644
--- a/llvm/test/Transforms/InstSimplify/known-never-nan.ll
+++ b/llvm/test/Transforms/InstSimplify/known-never-nan.ll
@@ -299,6 +299,17 @@ define i1 @nnan_unary_fneg() {
   ret i1 %tmp
 }
 
+define i1 @isNotKnownNeverNaN_fneg(double %x) {
+; CHECK-LABEL: @isNotKnownNeverNaN_fneg(
+; CHECK-NEXT:    [[NEG:%.*]] = fneg double [[X:%.*]]
+; CHECK-NEXT:    [[CMP:%.*]] = fcmp ord double [[NEG]], [[NEG]]
+; CHECK-NEXT:    ret i1 [[CMP]]
+;
+  %neg = fneg double %x
+  %cmp = fcmp ord double %neg, %neg
+  ret i1 %cmp
+}
+
 define i1 @sitofp(i32 %arg0) {
 ; CHECK-LABEL: @sitofp(
 ; CHECK-NEXT:    ret i1 false