Changes in directory llvm/lib/Target/X86:
README.txt updated: 1.144 -> 1.145
---
Log message:
it would be nice of ctlz were lowered to bsf etc.
---
Diffs of the changes: (+9 -0)
README.txt | 9 +++++++++
1 files changed, 9 insertions(+)
Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.144
llvm/lib/Target/X86/README.txt:1.145
--- llvm/lib/Target/X86/README.txt:1.144 Fri Nov 10 16:03:35 2006
+++ llvm/lib/Target/X86/README.txt Tue Nov 14 02:08:46 2006
@@ -114,6 +114,15 @@
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
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