[llvm] r339300 - [x86] add test for commuted variant for fsub fold; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Wed Aug  8 16:06:59 2018
New Revision: 339300

URL: http://llvm.org/viewvc/llvm-project?rev=339300&view=rev
Log:
[x86] add test for commuted variant for fsub fold; NFC

Modified:
    llvm/trunk/test/CodeGen/X86/fp-fold.ll

Modified: llvm/trunk/test/CodeGen/X86/fp-fold.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/fp-fold.ll?rev=339300&r1=339299&r2=339300&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/fp-fold.ll (original)
+++ llvm/trunk/test/CodeGen/X86/fp-fold.ll Wed Aug  8 16:06:59 2018
@@ -103,13 +103,32 @@ define float @fsub_neg_y(float %x, float
 ; UNSAFE-NEXT:    subss %xmm1, %xmm0
 ; UNSAFE-NEXT:    addss %xmm1, %xmm0
 ; UNSAFE-NEXT:    retq
-  %mul = fmul float %x, 5.000000e+00
+  %mul = fmul float %x, 5.0
   %add = fadd float %mul, %y
   %r = fsub nsz reassoc float %y, %add
   ret float %r
 }
 
-; Test node-level flags with:
+define float @fsub_neg_y_commute(float %x, float %y) {
+; STRICT-LABEL: fsub_neg_y_commute:
+; STRICT:       # %bb.0:
+; STRICT-NEXT:    mulss {{.*}}(%rip), %xmm0
+; STRICT-NEXT:    addss %xmm1, %xmm0
+; STRICT-NEXT:    subss %xmm0, %xmm1
+; STRICT-NEXT:    movaps %xmm1, %xmm0
+; STRICT-NEXT:    retq
+;
+; UNSAFE-LABEL: fsub_neg_y_commute:
+; UNSAFE:       # %bb.0:
+; UNSAFE-NEXT:    mulss {{.*}}(%rip), %xmm0
+; UNSAFE-NEXT:    subss %xmm1, %xmm0
+; UNSAFE-NEXT:    addss %xmm1, %xmm0
+; UNSAFE-NEXT:    retq
+  %mul = fmul float %x, 5.0
+  %add = fadd float %y, %mul
+  %r = fsub nsz reassoc float %y, %add
+  ret float %r
+}
 ; Y - (X + Y) --> -X
 
 define float @fsub_fadd_common_op_fneg(float %x, float %y) {