| ; Tests to make sure elimination of casts is working correctly |
| ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | notcast |
| |
| define i16 @test1(i16 %a) { |
| %tmp = zext i16 %a to i32 ; <i32> [#uses=2] |
| %tmp21 = lshr i32 %tmp, 8 ; <i32> [#uses=1] |
| %tmp5 = shl i32 %tmp, 8 ; <i32> [#uses=1] |
| %tmp.upgrd.32 = or i32 %tmp21, %tmp5 ; <i32> [#uses=1] |
| %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16 ; <i16> [#uses=1] |
| ret i16 %tmp.upgrd.3 |
| } |
| |
| define i16 @test2(i16 %a) { |
| %tmp = zext i16 %a to i32 ; <i32> [#uses=2] |
| %tmp21 = lshr i32 %tmp, 9 ; <i32> [#uses=1] |
| %tmp5 = shl i32 %tmp, 8 ; <i32> [#uses=1] |
| %tmp.upgrd.32 = or i32 %tmp21, %tmp5 ; <i32> [#uses=1] |
| %tmp.upgrd.3 = trunc i32 %tmp.upgrd.32 to i16 ; <i16> [#uses=1] |
| ret i16 %tmp.upgrd.3 |
| } |
| |
| ; PR1263 |
| define i32* @test3(i32* %tmp1) { |
| %tmp64 = bitcast i32* %tmp1 to { i32 }* ; <{ i32 }*> [#uses=1] |
| %tmp65 = getelementptr { i32 }* %tmp64, i32 0, i32 0 ; <i32*> [#uses=1] |
| ret i32* %tmp65 |
| } |
| |
| |