[llvm] r352805 - [x86] add test for missed opportunity to use 'inc'; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Thu Jan 31 14:33:11 2019
New Revision: 352805

URL: http://llvm.org/viewvc/llvm-project?rev=352805&view=rev
Log:
[x86] add test for missed opportunity to use 'inc'; NFC

Modified:
    llvm/trunk/test/CodeGen/X86/slow-incdec.ll

Modified: llvm/trunk/test/CodeGen/X86/slow-incdec.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/slow-incdec.ll?rev=352805&r1=352804&r2=352805&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/slow-incdec.ll (original)
+++ llvm/trunk/test/CodeGen/X86/slow-incdec.ll Thu Jan 31 14:33:11 2019
@@ -53,3 +53,33 @@ define i32 @dec_size(i32 %x) optsize {
   %r = add i32 %x, -1
   ret i32 %r
 }
+
+declare {i32, i1} @llvm.uadd.with.overflow.i32(i32, i32)
+declare void @other(i32* ) nounwind;
+
+define void @cond_ae_to_cond_ne(i32* %p) nounwind {
+; CHECK-LABEL: cond_ae_to_cond_ne:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; CHECK-NEXT:    addl $1, (%eax)
+; CHECK-NEXT:    jae .LBB4_1
+; CHECK-NEXT:  # %bb.2: # %if.end4
+; CHECK-NEXT:    jmp other # TAILCALL
+; CHECK-NEXT:  .LBB4_1: # %return
+; CHECK-NEXT:    retl
+entry:
+  %t0 = load i32, i32* %p, align 8
+  %add_ov = call {i32, i1} @llvm.uadd.with.overflow.i32(i32 %t0, i32 1)
+  %inc = extractvalue { i32, i1 } %add_ov, 0
+  store i32 %inc, i32* %p, align 8
+  %ov = extractvalue { i32, i1 } %add_ov, 1
+  br i1 %ov, label %if.end4, label %return
+
+if.end4:
+  tail call void @other(i32* %p) nounwind
+  br label %return
+
+return:
+  ret void
+}
+