Add a neat little two's complement hack for x86.

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

diff --git a/test/CodeGen/X86/sub.ll b/test/CodeGen/X86/sub.ll
new file mode 100644 (file)
index 0000000..2a4d2d6
--- /dev/null
+++ b/test/CodeGen/X86/sub.ll
@@ -0,0 +1,11 @@
+; RUN: llc -march=x86 < sub.ll | FileCheck %s
+
+define i32 @test1(i32 %x) {
+  %xor = xor i32 %x, 31
+  %sub = sub i32 32, %xor
+  ret i32 %sub
+; CHECK: test1:
+; CHECK:      xorl $-32
+; CHECK-NEXT: addl $33
+; CHECK-NEXT: ret
+}