[llvm] r316160 - [X86] Add scalar (abs (abs x)) -> (abs x) combine test.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Thu Oct 19 07:59:26 2017
New Revision: 316160

URL: http://llvm.org/viewvc/llvm-project?rev=316160&view=rev
Log:
[X86] Add scalar (abs (abs x)) -> (abs x) combine test.

Before landing D38895

Modified:
    llvm/trunk/test/CodeGen/X86/combine-abs.ll

Modified: llvm/trunk/test/CodeGen/X86/combine-abs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/combine-abs.ll?rev=316160&r1=316159&r2=316160&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/combine-abs.ll (original)
+++ llvm/trunk/test/CodeGen/X86/combine-abs.ll Thu Oct 19 07:59:26 2017
@@ -23,6 +23,25 @@ define <16 x i16> @combine_v16i16_abs_co
 }
 
 ; fold (abs (abs x)) -> (abs x)
+define i32 @combine_i32_abs_abs(i32 %a) {
+; CHECK-LABEL: combine_i32_abs_abs:
+; CHECK:       # BB#0:
+; CHECK-NEXT:    movl %edi, %ecx
+; CHECK-NEXT:    negl %ecx
+; CHECK-NEXT:    cmovll %edi, %ecx
+; CHECK-NEXT:    movl %ecx, %eax
+; CHECK-NEXT:    negl %eax
+; CHECK-NEXT:    cmovll %ecx, %eax
+; CHECK-NEXT:    retq
+  %n1 = sub i32 zeroinitializer, %a
+  %b1 = icmp slt i32 %a, zeroinitializer
+  %a1 = select i1 %b1, i32 %n1, i32 %a
+  %n2 = sub i32 zeroinitializer, %a1
+  %b2 = icmp sgt i32 %a1, zeroinitializer
+  %a2 = select i1 %b2, i32 %a1, i32 %n2
+  ret i32 %a2
+}
+
 define <8 x i16> @combine_v8i16_abs_abs(<8 x i16> %a) {
 ; CHECK-LABEL: combine_v8i16_abs_abs:
 ; CHECK:       # BB#0: