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llvm-svn: 33778
This commit is contained in:
Chris Lattner 2007-02-02 04:36:46 +00:00
parent 1b0dd17ea9
commit 63479262b4
1 changed files with 14 additions and 0 deletions
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14
lib/Target/ARM/README.txt
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@ -43,6 +43,20 @@ Among the obvious wins, doing so can eliminate the need to custom expand
copysign (i.e. we won't need to custom expand it to get the conditional
negate).
This allows us to eliminate one instruction from:
define i32 @_Z6slow4bii(i32 %x, i32 %y) {
%tmp = icmp sgt i32 %x, %y
%retval = select i1 %tmp, i32 %x, i32 %y
ret i32 %retval
}
__Z6slow4bii:
cmp r0, r1
movgt r1, r0
mov r0, r1
bx lr
//===---------------------------------------------------------------------===//
Implement long long "X-3" with instructions that fold the immediate in. These