1 files changed, 33 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/fdiv.ll b/llvm/test/Transforms/InstCombine/fdiv.ll
index 8073371c16b..9e265d2135f 100644
--- a/llvm/test/Transforms/InstCombine/fdiv.ll
+++ b/llvm/test/Transforms/InstCombine/fdiv.ll
@@ -122,6 +122,15 @@ define <2 x float> @not_exact_inverse_vec_arcp(<2 x float> %x) {
   ret <2 x float> %div
 }
 
+define <2 x float> @not_exact_inverse_vec_arcp_with_undef_elt(<2 x float> %x) {
+; CHECK-LABEL: @not_exact_inverse_vec_arcp_with_undef_elt(
+; CHECK-NEXT:    [[DIV:%.*]] = fdiv arcp <2 x float> [[X:%.*]], <float undef, float 3.000000e+00>
+; CHECK-NEXT:    ret <2 x float> [[DIV]]
+;
+  %div = fdiv arcp <2 x float> %x, <float undef, float 3.0>
+  ret <2 x float> %div
+}
+
 ; (X / Y) / Z --> X / (Y * Z)
 
 define float @div_with_div_numerator(float %x, float %y, float %z) {
@@ -213,6 +222,19 @@ define <2 x float> @fneg_fneg_vec(<2 x float> %x, <2 x float> %y) {
   ret <2 x float> %div
 }
 
+define <2 x float> @fneg_fneg_vec_undef_elts(<2 x float> %x, <2 x float> %y) {
+; CHECK-LABEL: @fneg_fneg_vec_undef_elts(
+; CHECK-NEXT:    [[XNEG:%.*]] = fsub <2 x float> <float undef, float -0.000000e+00>, [[X:%.*]]
+; CHECK-NEXT:    [[YNEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float undef>, [[Y:%.*]]
+; CHECK-NEXT:    [[DIV:%.*]] = fdiv <2 x float> [[XNEG]], [[YNEG]]
+; CHECK-NEXT:    ret <2 x float> [[DIV]]
+;
+  %xneg = fsub <2 x float> <float undef, float -0.0>, %x
+  %yneg = fsub <2 x float> <float -0.0, float undef>, %y
+  %div = fdiv <2 x float> %xneg, %yneg
+  ret <2 x float> %div
+}
+
 define float @fneg_dividend_constant_divisor(float %x) {
 ; CHECK-LABEL: @fneg_dividend_constant_divisor(
 ; CHECK-NEXT:    [[DIV:%.*]] = fdiv nsz float [[X:%.*]], -3.000000e+00
@@ -243,6 +265,17 @@ define <2 x float> @fneg_dividend_constant_divisor_vec(<2 x float> %x) {
   ret <2 x float> %div
 }
 
+define <2 x float> @fneg_dividend_constant_divisor_vec_undef_elt(<2 x float> %x) {
+; CHECK-LABEL: @fneg_dividend_constant_divisor_vec_undef_elt(
+; CHECK-NEXT:    [[NEG:%.*]] = fsub <2 x float> <float undef, float -0.000000e+00>, [[X:%.*]]
+; CHECK-NEXT:    [[DIV:%.*]] = fdiv ninf <2 x float> [[NEG]], <float 3.000000e+00, float -8.000000e+00>
+; CHECK-NEXT:    ret <2 x float> [[DIV]]
+;
+  %neg = fsub <2 x float> <float undef, float -0.0>, %x
+  %div = fdiv ninf <2 x float> %neg, <float 3.0, float -8.0>
+  ret <2 x float> %div
+}
+
 define <2 x float> @fneg_divisor_constant_dividend_vec(<2 x float> %x) {
 ; CHECK-LABEL: @fneg_divisor_constant_dividend_vec(
 ; CHECK-NEXT:    [[DIV:%.*]] = fdiv afn <2 x float> <float 3.000000e+00, float -5.000000e+00>, [[X:%.*]]