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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31477 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-11-06 21:26:49 +00:00
parent 1d2bf885dd
commit 8c97c07040
1 changed files with 16 additions and 0 deletions
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16
lib/Target/README.txt
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@ -287,6 +287,22 @@ unsigned int swap_32(unsigned int v) {
return v;
}
Nor is this:
ushort %bad(ushort %a) {
entry:
%tmp = cast ushort %a to uint ; <uint> [#uses=1]
%tmp2 = shr uint %tmp, ubyte 8 ; <uint> [#uses=1]
%tmp2 = cast uint %tmp2 to ushort ; <ushort> [#uses=1]
%tmp5 = shl ushort %a, ubyte 8 ; <ushort> [#uses=1]
%tmp6 = or ushort %tmp2, %tmp5 ; <ushort> [#uses=1]
ret ushort %tmp6
}
unsigned short bad(unsigned short a) {
return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8);
}
//===---------------------------------------------------------------------===//
These should turn into single 16-bit (unaligned?) loads on little/big endian