diff options
| -rw-r--r-- | lib/Target/X86/README.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 834a47c51b..629d30336b 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -114,6 +114,15 @@ ctz: however, check that these are defined for 0 and 32. Our intrinsics are, GCC's aren't. +Another example (use predsimplify to eliminate a select): + +int foo (unsigned long j) { + if (j) + return __builtin_ffs (j) - 1; + else + return 0; +} + //===---------------------------------------------------------------------===// Use push/pop instructions in prolog/epilog sequences instead of stores off |