These functions should use shll, not lea.

llvm-svn: 35203

1 files changed, 27 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/shift-codegen.ll b/llvm/test/CodeGen/X86/shift-codegen.ll
new file mode 100644
index 00000000000..0fc180310df
--- /dev/null
+++ b/llvm/test/CodeGen/X86/shift-codegen.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | llc -relocation-model=static -march=x86 | grep 'shll $3' | wc -l | grep 2
+
+; This should produce two shll instructions, not any lea's.
+
+target triple = "i686-apple-darwin8"
+@Y = weak global i32 0          ; <i32*> [#uses=1]
+@X = weak global i32 0          ; <i32*> [#uses=2]
+
+implementation   ; Functions:
+
+define void @fn1() {
+entry:
+        %tmp = load i32* @Y             ; <i32> [#uses=1]
+        %tmp1 = shl i32 %tmp, 3         ; <i32> [#uses=1]
+        %tmp2 = load i32* @X            ; <i32> [#uses=1]
+        %tmp3 = or i32 %tmp1, %tmp2             ; <i32> [#uses=1]
+        store i32 %tmp3, i32* @X
+        ret void
+}
+
+define i32 @fn2(i32 %X, i32 %Y) {
+entry:
+        %tmp2 = shl i32 %Y, 3           ; <i32> [#uses=1]
+        %tmp4 = or i32 %tmp2, %X                ; <i32> [#uses=1]
+        ret i32 %tmp4
+}
+