new testcase for pr687

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29967 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/shift-coalesce.ll b/test/CodeGen/X86/shift-coalesce.ll
new file mode 100644 (file)
index 0000000..90295f1
--- /dev/null
+++ b/test/CodeGen/X86/shift-coalesce.ll
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | grep 'shld.*CL' &&
+; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | not grep 'mov CL, BL'
+
+; PR687
+
+ulong %foo(ulong %x, long* %X) {
+       %tmp.1 = load long* %X          ; <long> [#uses=1]
+       %tmp.3 = cast long %tmp.1 to ubyte              ; <ubyte> [#uses=1]
+       %tmp.4 = shl ulong %x, ubyte %tmp.3             ; <ulong> [#uses=1]
+       ret ulong %tmp.4
+}