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Add a README entry.

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llvm-svn: 102906
This commit is contained in:
Dan Gohman 2010-05-03 14:31:00 +00:00
parent 153ad3b903
commit 4f9dc00cec
1 changed files with 13 additions and 0 deletions
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13
lib/Target/README.txt
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@ -1835,3 +1835,16 @@ See GCC PR34949
//===---------------------------------------------------------------------===//
In this code:
long foo(long x) {
return x > 1 ? x : 1;
}
LLVM emits a comparison with 1 instead of 0. 0 would be equivalent
and cheaper on most targets.
LLVM prefers comparisons with zero over non-zero in general, but in this
case it choses instead to keep the max operation obvious.
//===---------------------------------------------------------------------===//