new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36243 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/shl_elim.ll b/test/CodeGen/X86/shl_elim.ll
new file mode 100644 (file)
index 0000000..2e48e52
--- /dev/null
+++ b/test/CodeGen/X86/shl_elim.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep {movl 8(.esp), %eax}
+; RUN: llvm-as < %s | llc -march=x86 | grep {shll .15, .eax}
+; RUN: llvm-as < %s | llc -march=x86 | grep {sarl .16, .eax}
+
+define i32 @test1(i64 %a) {
+        %tmp29 = lshr i64 %a, 24                ; <i64> [#uses=1]
+        %tmp23 = trunc i64 %tmp29 to i32                ; <i32> [#uses=1]
+        %tmp410 = lshr i32 %tmp23, 9            ; <i32> [#uses=1]
+        %tmp45 = trunc i32 %tmp410 to i16               ; <i16> [#uses=1]
+        %tmp456 = sext i16 %tmp45 to i32                ; <i32> [#uses=1]
+        ret i32 %tmp456
+}
+