new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34622 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/x86-64-arg.ll b/test/CodeGen/X86/x86-64-arg.ll
new file mode 100644 (file)
index 0000000..9b18f11
--- /dev/null
+++ b/test/CodeGen/X86/x86-64-arg.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | llc | grep 'movl %edi, %eax'
+; The input value is already sign extended, don't re-extend it.
+; This testcase corresponds to:
+;   int test(short X) { return (int)X; }
+
+target datalayout = "e-p:64:64"
+target triple = "x86_64-apple-darwin8"
+
+implementation   ; Functions:
+
+define i32 @test(i16 sext  %X) {
+entry:
+        %tmp12 = sext i16 %X to i32             ; <i32> [#uses=1]
+        ret i32 %tmp12
+}
+