1 files changed, 46 insertions, 17 deletions

diff --git a/test/Transforms/InstSimplify/floating-point-arithmetic.ll b/test/Transforms/InstSimplify/floating-point-arithmetic.ll
index b0957a8177395..b825ac80b6d66 100644
--- a/test/Transforms/InstSimplify/floating-point-arithmetic.ll
+++ b/test/Transforms/InstSimplify/floating-point-arithmetic.ll
@@ -1,51 +1,83 @@
+; NOTE: Assertions have been autogenerated by update_test_checks.py
 ; RUN: opt < %s -instsimplify -S | FileCheck %s
 
-; fsub 0, (fsub 0, X) ==> X
-; CHECK-LABEL: @fsub_0_0_x(
-define float @fsub_0_0_x(float %a) {
+; fsub -0.0, (fsub -0.0, X) ==> X
+define float @fsub_-0_-0_x(float %a) {
+; CHECK-LABEL: @fsub_-0_-0_x(
+; CHECK:         ret float %a
+;
   %t1 = fsub float -0.0, %a
   %ret = fsub float -0.0, %t1
+  ret float %ret
+}
+
+; fsub 0.0, (fsub -0.0, X) != X
+define float @fsub_0_-0_x(float %a) {
+; CHECK-LABEL: @fsub_0_-0_x(
+; CHECK:         [[T1:%.*]] = fsub float 0.000000e+00, %a
+; CHECK-NEXT:    [[RET:%.*]] = fsub float -0.000000e+00, [[T1]]
+; CHECK-NEXT:    ret float [[RET]]
+;
+  %t1 = fsub float 0.0, %a
+  %ret = fsub float -0.0, %t1
+  ret float %ret
+}
 
-; CHECK: ret float %a
+; fsub -0.0, (fsub 0.0, X) != X
+define float @fsub_-0_0_x(float %a) {
+; CHECK-LABEL: @fsub_-0_0_x(
+; CHECK:         [[T1:%.*]] = fsub float -0.000000e+00, %a
+; CHECK-NEXT:    [[RET:%.*]] = fsub float 0.000000e+00, [[T1]]
+; CHECK-NEXT:    ret float [[RET]]
+;
+  %t1 = fsub float -0.0, %a
+  %ret = fsub float 0.0, %t1
   ret float %ret
 }
 
 ; fsub X, 0 ==> X
-; CHECK-LABEL: @fsub_x_0(
 define float @fsub_x_0(float %a) {
+; CHECK-LABEL: @fsub_x_0(
+; CHECK:         ret float %a
+;
   %ret = fsub float %a, 0.0
-; CHECK: ret float %a
   ret float %ret
 }
 
 ; fadd X, -0 ==> X
-; CHECK-LABEL: @fadd_x_n0(
 define float @fadd_x_n0(float %a) {
+; CHECK-LABEL: @fadd_x_n0(
+; CHECK:         ret float %a
+;
   %ret = fadd float %a, -0.0
-; CHECK: ret float %a
   ret float %ret
 }
 
 ; fmul X, 1.0 ==> X
-; CHECK-LABEL: @fmul_X_1(
 define double @fmul_X_1(double %a) {
-  %b = fmul double 1.000000e+00, %a                ; <double> [#uses=1]
-  ; CHECK: ret double %a
+; CHECK-LABEL: @fmul_X_1(
+; CHECK:         ret double %a
+;
+  %b = fmul double 1.000000e+00, %a
   ret double %b
 }
 
 ; We can't optimize away the fadd in this test because the input
-; value to the function and subsequently to the fadd may be -0.0. 
+; value to the function and subsequently to the fadd may be -0.0.
 ; In that one special case, the result of the fadd should be +0.0
 ; rather than the first parameter of the fadd.
 
-; Fragile test warning: We need 6 sqrt calls to trigger the bug 
-; because the internal logic has a magic recursion limit of 6. 
+; Fragile test warning: We need 6 sqrt calls to trigger the bug
+; because the internal logic has a magic recursion limit of 6.
 ; This is presented without any explanation or ability to customize.
 
 declare float @sqrtf(float)
 
 define float @PR22688(float %x) {
+; CHECK-LABEL: @PR22688(
+; CHECK:         [[TMP7:%.*]] = fadd float {{%.*}}, 0.000000e+00
+; CHECK-NEXT:    ret float [[TMP7]]
+;
   %1 = call float @sqrtf(float %x)
   %2 = call float @sqrtf(float %1)
   %3 = call float @sqrtf(float %2)
@@ -54,8 +86,5 @@ define float @PR22688(float %x) {
   %6 = call float @sqrtf(float %5)
   %7 = fadd float %6, 0.0
   ret float %7
-
-; CHECK-LABEL: @PR22688(
-; CHECK: fadd float %6, 0.0
 }