[InstSimplify] add test for m_NegZero with undef elt; NFC
llvm-svn: 327287
diff --git a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
index 7e19c9b..fc36493 100644
--- a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
+++ b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
@@ -1,6 +1,15 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
+define <2 x float> @fsub_negzero_vec_undef_elts(<2 x float> %x) {
+; CHECK-LABEL: @fsub_negzero_vec_undef_elts(
+; CHECK-NEXT: [[R:%.*]] = fsub nsz <2 x float> [[X:%.*]], <float undef, float -0.000000e+00>
+; CHECK-NEXT: ret <2 x float> [[R]]
+;
+ %r = fsub nsz <2 x float> %x, <float undef, float -0.0>
+ ret <2 x float> %r
+}
+
; fsub -0.0, (fsub -0.0, X) ==> X
define float @fsub_-0_-0_x(float %a) {
; CHECK-LABEL: @fsub_-0_-0_x(