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new testcase, instcombine should turn these into llvm.bswap intrinsics.

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llvm-svn: 28802
This commit is contained in:
Chris Lattner 2006-06-15 19:06:42 +00:00
parent 7800330454
commit 756231f26f
1 changed files with 28 additions and 0 deletions
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28
test/Regression/Transforms/InstCombine/bswap.ll Normal file
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; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' | wc -l | grep 2
uint %test1(uint %i) {
%tmp1 = shr uint %i, ubyte 24 ; <uint> [#uses=1]
%tmp3 = shr uint %i, ubyte 8 ; <uint> [#uses=1]
%tmp4 = and uint %tmp3, 65280 ; <uint> [#uses=1]
%tmp5 = or uint %tmp1, %tmp4 ; <uint> [#uses=1]
%tmp7 = shl uint %i, ubyte 8 ; <uint> [#uses=1]
%tmp8 = and uint %tmp7, 16711680 ; <uint> [#uses=1]
%tmp9 = or uint %tmp5, %tmp8 ; <uint> [#uses=1]
%tmp11 = shl uint %i, ubyte 24 ; <uint> [#uses=1]
%tmp12 = or uint %tmp9, %tmp11 ; <uint> [#uses=1]
ret uint %tmp12
}
uint %test2(uint %arg) {
%tmp2 = shl uint %arg, ubyte 24 ; <uint> [#uses=1]
%tmp4 = shl uint %arg, ubyte 8 ; <uint> [#uses=1]
%tmp5 = and uint %tmp4, 16711680 ; <uint> [#uses=1]
%tmp6 = or uint %tmp2, %tmp5 ; <uint> [#uses=1]
%tmp8 = shr uint %arg, ubyte 8 ; <uint> [#uses=1]
%tmp9 = and uint %tmp8, 65280 ; <uint> [#uses=1]
%tmp10 = or uint %tmp6, %tmp9 ; <uint> [#uses=1]
%tmp12 = shr uint %arg, ubyte 24 ; <uint> [#uses=1]
%tmp14 = or uint %tmp10, %tmp12 ; <uint> [#uses=1]
ret uint %tmp14
}