Add x86-specific DAG combine to simplify:

[oota-llvm.git] / test / CodeGen / X86 / neg_cmp.ll

diff --git a/test/CodeGen/X86/neg_cmp.ll b/test/CodeGen/X86/neg_cmp.ll
new file mode 100644 (file)
index 0000000..866514e
--- /dev/null
+++ b/test/CodeGen/X86/neg_cmp.ll
@@ -0,0 +1,22 @@
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+
+; rdar://11245199
+; PR12545
+define void @f(i32 %x, i32 %y) nounwind uwtable ssp {
+entry:
+; CHECK: f:
+; CHECK-NOT: neg
+; CHECK: add
+  %sub = sub i32 0, %y
+  %cmp = icmp eq i32 %x, %sub
+  br i1 %cmp, label %if.then, label %if.end
+
+if.then:                                          ; preds = %entry
+  tail call void @g() nounwind
+  br label %if.end
+
+if.end:                                           ; preds = %if.then, %entry
+  ret void
+}
+
+declare void @g()