diff options
Diffstat (limited to 'test/Transforms/InstCombine/shift-sra.ll')
-rw-r--r-- | test/Transforms/InstCombine/shift-sra.ll | 19 |
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 +} |