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we know that all uses of the global will trap if the pointer contained is null. In this case, we forward substitute the stored value to any uses. This has the effect of devirtualizing trivial globals in trivial cases. For example, 164.gzip contains this: gzip.h:extern int (*read_buf) OF((char *buf, unsigned size)); bits.c: read_buf = file_read; deflate.c: lookahead = read_buf((char*)window, deflate.c: n = read_buf((char*)window+strstart+lookahead, more); Since read_buf has to point to file_read at every use, we just replace the calls through read_buf with a direct call to file_read. This occurs in several benchmarks, including 176.gcc and 164.gzip. Direct calls are good and stuff. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16871 91177308-0d34-0410-b5e6-96231b3b80d8 |
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.. | ||
ArgumentPromotion.cpp | ||
ConstantMerge.cpp | ||
DeadArgumentElimination.cpp | ||
DeadTypeElimination.cpp | ||
ExtractFunction.cpp | ||
FunctionResolution.cpp | ||
GlobalDCE.cpp | ||
GlobalOpt.cpp | ||
Inliner.cpp | ||
Inliner.h | ||
InlineSimple.cpp | ||
Internalize.cpp | ||
IPConstantPropagation.cpp | ||
LoopExtractor.cpp | ||
LowerSetJmp.cpp | ||
Makefile | ||
PruneEH.cpp | ||
RaiseAllocations.cpp |