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author | Chris Lattner <sabre@nondot.org> | 2006-11-29 07:21:08 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2006-11-29 07:21:08 +0000 |
commit | 71d8f4d84a0c41fed67447cd146af09ffd9cc865 (patch) | |
tree | 5d8a0a29b4d5cb41addfabd5d80819b1686fc43c /test/Transforms/InstCombine/bswap.ll | |
parent | 46b96055cf34dca14ca4d3f853fa8cd8785e5517 (diff) | |
download | llvm-71d8f4d84a0c41fed67447cd146af09ffd9cc865.tar.gz llvm-71d8f4d84a0c41fed67447cd146af09ffd9cc865.tar.bz2 llvm-71d8f4d84a0c41fed67447cd146af09ffd9cc865.tar.xz |
new bswap idiom
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32012 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/bswap.ll')
-rw-r--r-- | test/Transforms/InstCombine/bswap.ll | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/test/Transforms/InstCombine/bswap.ll b/test/Transforms/InstCombine/bswap.ll index 6f434e3f27..87caf29252 100644 --- a/test/Transforms/InstCombine/bswap.ll +++ b/test/Transforms/InstCombine/bswap.ll @@ -1,4 +1,4 @@ -; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' | wc -l | grep 4 +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'call.*llvm.bswap' | wc -l | grep 5 uint %test1(uint %i) { %tmp1 = shr uint %i, ubyte 24 ; <uint> [#uses=1] @@ -40,3 +40,22 @@ ushort %test4(ushort %s) { ret ushort %tmp5 } +; unsigned short test5(unsigned short a) { +; return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8); +;} +ushort %test5(ushort %a) { + %tmp = zext ushort %a to int + %tmp1 = and int %tmp, 65280 + %tmp2 = ashr int %tmp1, ubyte 8 + %tmp2 = trunc int %tmp2 to short + %tmp3 = zext ushort %a to int + %tmp4 = and int %tmp3, 255 + %tmp5 = shl int %tmp4, ubyte 8 + %tmp5 = trunc int %tmp5 to short + %tmp = or short %tmp2, %tmp5 + %tmp6 = bitcast short %tmp to ushort + %tmp6 = zext ushort %tmp6 to int + %retval = trunc int %tmp6 to ushort + ret ushort %retval +} + |