From 66911b16e66f72454d9668db9d627fc588823b78 Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Mon, 26 Feb 2018 23:23:02 +0000
Subject: [PATCH] [InstCombine, InstSimplify] add tests with undef elements in
 constant FP vectors; NFC

llvm-svn: 326148
---
 llvm/test/Transforms/InstCombine/fdiv.ll      | 33 +++++++++++++++++++
 .../InstSimplify/floating-point-arithmetic.ll | 29 ++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/llvm/test/Transforms/InstCombine/fdiv.ll b/llvm/test/Transforms/InstCombine/fdiv.ll
index 8073371c16b4..9e265d2135ff 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:%.*]]
diff --git a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
index ba177ead7185..d564992e2d83 100644
--- a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
+++ b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
@@ -11,6 +11,26 @@ define float @fsub_-0_-0_x(float %a) {
   ret float %ret
 }
 
+define <2 x float> @fsub_-0_-0_x_vec(<2 x float> %a) {
+; CHECK-LABEL: @fsub_-0_-0_x_vec(
+; CHECK-NEXT:    ret <2 x float> [[A:%.*]]
+;
+  %t1 = fsub <2 x float> <float -0.0, float -0.0>, %a
+  %ret = fsub <2 x float> <float -0.0, float -0.0>, %t1
+  ret <2 x float> %ret
+}
+
+define <2 x float> @fsub_-0_-0_x_vec_undef_elts(<2 x float> %a) {
+; CHECK-LABEL: @fsub_-0_-0_x_vec_undef_elts(
+; CHECK-NEXT:    [[T1:%.*]] = fsub <2 x float> <float undef, float -0.000000e+00>, [[A:%.*]]
+; CHECK-NEXT:    [[RET:%.*]] = fsub <2 x float> <float -0.000000e+00, float undef>, [[T1]]
+; CHECK-NEXT:    ret <2 x float> [[RET]]
+;
+  %t1 = fsub <2 x float> <float undef, float -0.0>, %a
+  %ret = fsub <2 x float> <float -0.0, float undef>, %t1
+  ret <2 x float> %ret
+}
+
 ; fsub 0.0, (fsub -0.0, X) != X
 define float @fsub_0_-0_x(float %a) {
 ; CHECK-LABEL: @fsub_0_-0_x(
@@ -53,6 +73,15 @@ define float @fadd_x_n0(float %a) {
   ret float %ret
 }
 
+define <2 x float> @fadd_x_n0_vec_undef_elt(<2 x float> %a) {
+; CHECK-LABEL: @fadd_x_n0_vec_undef_elt(
+; CHECK-NEXT:    [[RET:%.*]] = fadd <2 x float> [[A:%.*]], <float -0.000000e+00, float undef>
+; CHECK-NEXT:    ret <2 x float> [[RET]]
+;
+  %ret = fadd <2 x float> %a, <float -0.0, float undef>
+  ret <2 x float> %ret
+}
+
 ; fmul X, 1.0 ==> X
 define double @fmul_X_1(double %a) {
 ; CHECK-LABEL: @fmul_X_1(