1 files changed, 19 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/shift-sra.ll b/test/Transforms/InstCombine/shift-sra.ll
new file mode 100644
index 000000000000..6058bd6dc724
--- /dev/null
+++ b/test/Transforms/InstCombine/shift-sra.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
+; RUN:    grep {lshr i32} | count 2
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep ashr
+
+
+define i32 @test1(i32 %X, i8 %A) {
+        %shift.upgrd.1 = zext i8 %A to i32              ; <i32> [#uses=1]
+        ; can be logical shift.
+        %Y = ashr i32 %X, %shift.upgrd.1                ; <i32> [#uses=1]
+        %Z = and i32 %Y, 1              ; <i32> [#uses=1]
+        ret i32 %Z
+}
+
+define i32 @test2(i8 %tmp) {
+        %tmp3 = zext i8 %tmp to i32             ; <i32> [#uses=1]
+        %tmp4 = add i32 %tmp3, 7                ; <i32> [#uses=1]
+        %tmp5 = ashr i32 %tmp4, 3               ; <i32> [#uses=1]
+        ret i32 %tmp5
+}