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Cygwin defines log2 as a macro. Undef it here IFF it has already been defined,

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so that we always get the inline function instead. Remember, kids, like it says
in the GCC manual, "An Inline Function is As Fast As a Macro."

llvm-svn: 11815
This commit is contained in:
Brian Gaeke 2004-02-25 01:53:45 +00:00
parent 8bf1c4c026
commit 5d29845f19
1 changed files with 4 additions and 0 deletions
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4
include/Support/MathExtras.h
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@ -18,6 +18,10 @@
namespace llvm {
#if defined(log2)
# undef log2
#endif
inline unsigned log2(uint64_t C) {
unsigned getPow;
for (getPow = 0; C > 1; ++getPow)