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author | Chris Lattner <sabre@nondot.org> | 2005-12-17 21:05:49 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2005-12-17 21:05:49 +0000 |
commit | 2cfdbb27165ee24b28a84f1a7cd3196b7afd2a5e (patch) | |
tree | 8878ce5f5df88afae03b3668381049ba0f60a765 /docs/CommandGuide | |
parent | 217aabf89ee0316bb4bbcc460bdc24900fe50a02 (diff) |
add andn/orn/xorn patterns. This allows us to compile this:
long %test(ubyte, short, long %X, long %Y) {
%A = xor long %X, -1
%B = and long %Y, %A
ret long %B
}
to this:
test:
save -96, %sp, %sp
andn %i4, %i2, %i0
andn %i5, %i3, %i1
restore %g0, %g0, %g0
retl
nop
instead of this:
test:
save -96, %sp, %sp
xor %i2, -1, %l0
xor %i3, -1, %l1
and %i4, %l0, %i0
and %i5, %l1, %i1
restore %g0, %g0, %g0
retl
nop
The simpleisel emits: :(
test:
save -96, %sp, %sp
or %g0, -1, %l0
or %g0, -1, %l0
or %g0, -1, %l0
or %g0, -1, %l1
xor %i2, %l0, %l0
xor %i3, %l1, %l1
and %i4, %l0, %i0
and %i5, %l1, %i1
restore %g0, %g0, %g0
retl
nop
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24793 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CommandGuide')
0 files changed, 0 insertions, 0 deletions