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Diffstat (limited to 'test/Transforms/InstCombine/zext.ll')
| -rw-r--r-- | test/Transforms/InstCombine/zext.ll | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/zext.ll b/test/Transforms/InstCombine/zext.ll new file mode 100644 index 000000000000..c0fa3771cc15 --- /dev/null +++ b/test/Transforms/InstCombine/zext.ll @@ -0,0 +1,33 @@ +; Tests to make sure elimination of casts is working correctly +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \ +; RUN: notcast {} {%c1.*} + +define i64 @test_sext_zext(i16 %A) { + %c1 = zext i16 %A to i32 ; <i32> [#uses=1] + %c2 = sext i32 %c1 to i64 ; <i64> [#uses=1] + ret i64 %c2 +} + +; PR3599 +define i32 @test2(i64 %tmp) nounwind readnone { +entry: + %tmp5 = trunc i64 %tmp to i8 ; <i8> [#uses=1] + %tmp7 = lshr i64 %tmp, 8 ; <i64> [#uses=1] + %tmp8 = trunc i64 %tmp7 to i8 ; <i8> [#uses=1] + %tmp10 = lshr i64 %tmp, 16 ; <i64> [#uses=1] + %tmp11 = trunc i64 %tmp10 to i8 ; <i8> [#uses=1] + %tmp13 = lshr i64 %tmp, 24 ; <i64> [#uses=1] + %tmp14 = trunc i64 %tmp13 to i8 ; <i8> [#uses=1] + %tmp1 = zext i8 %tmp5 to i32 ; <i32> [#uses=1] + %tmp2 = zext i8 %tmp8 to i32 ; <i32> [#uses=1] + %tmp3 = shl i32 %tmp2, 8 ; <i32> [#uses=1] + %tmp4 = zext i8 %tmp11 to i32 ; <i32> [#uses=1] + %tmp6 = shl i32 %tmp4, 16 ; <i32> [#uses=1] + %tmp9 = zext i8 %tmp14 to i32 ; <i32> [#uses=1] + %tmp12 = shl i32 %tmp9, 24 ; <i32> [#uses=1] + %tmp15 = or i32 %tmp12, %tmp1 ; <i32> [#uses=1] + %tmp16 = or i32 %tmp15, %tmp6 ; <i32> [#uses=1] + %tmp17 = or i32 %tmp16, %tmp3 ; <i32> [#uses=1] + ret i32 %tmp17 +} + |