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a84f47c3e7
eliminate all the extensions and all but the one required truncate from the testcase, but the or/and/shift stuff still isn't zapped. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64809 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1.2 KiB
LLVM
34 lines
1.2 KiB
LLVM
; Tests to make sure elimination of casts is working correctly
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \
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; RUN: notcast {} {%c1.*}
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define i64 @test_sext_zext(i16 %A) {
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%c1 = zext i16 %A to i32 ; <i32> [#uses=1]
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%c2 = sext i32 %c1 to i64 ; <i64> [#uses=1]
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ret i64 %c2
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}
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; PR3599
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define i32 @test2(i64 %tmp) nounwind readnone {
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entry:
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%tmp5 = trunc i64 %tmp to i8 ; <i8> [#uses=1]
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%tmp7 = lshr i64 %tmp, 8 ; <i64> [#uses=1]
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%tmp8 = trunc i64 %tmp7 to i8 ; <i8> [#uses=1]
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%tmp10 = lshr i64 %tmp, 16 ; <i64> [#uses=1]
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%tmp11 = trunc i64 %tmp10 to i8 ; <i8> [#uses=1]
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%tmp13 = lshr i64 %tmp, 24 ; <i64> [#uses=1]
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%tmp14 = trunc i64 %tmp13 to i8 ; <i8> [#uses=1]
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%tmp1 = zext i8 %tmp5 to i32 ; <i32> [#uses=1]
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%tmp2 = zext i8 %tmp8 to i32 ; <i32> [#uses=1]
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%tmp3 = shl i32 %tmp2, 8 ; <i32> [#uses=1]
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%tmp4 = zext i8 %tmp11 to i32 ; <i32> [#uses=1]
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%tmp6 = shl i32 %tmp4, 16 ; <i32> [#uses=1]
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%tmp9 = zext i8 %tmp14 to i32 ; <i32> [#uses=1]
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%tmp12 = shl i32 %tmp9, 24 ; <i32> [#uses=1]
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%tmp15 = or i32 %tmp12, %tmp1 ; <i32> [#uses=1]
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%tmp16 = or i32 %tmp15, %tmp6 ; <i32> [#uses=1]
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%tmp17 = or i32 %tmp16, %tmp3 ; <i32> [#uses=1]
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ret i32 %tmp17
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}
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