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| -rw-r--r-- | lib/Target/README.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index acf36b8482..144bf5d3e3 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -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. + +//===---------------------------------------------------------------------===// |