Chris Lattner 9b34a61019 Eliminate global pointers that are only stored a single value and null if ... 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		2004-10-09 21:48:45 +00:00
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ArgumentPromotion.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
ConstantMerge.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
DeadArgumentElimination.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
DeadTypeElimination.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
ExtractFunction.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
FunctionResolution.cpp	Disable the 'WARNING: Found global types that are not compatible' warning	2004-09-30 00:12:29 +00:00
GlobalDCE.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
GlobalOpt.cpp	Eliminate global pointers that are only stored a single value and null if	2004-10-09 21:48:45 +00:00
Inliner.cpp	Fix the inliner to always delete any edges from the external call node to	2004-09-18 21:37:03 +00:00
Inliner.h	Simplify the interface and remove an unneeded #include	2004-05-23 21:21:35 +00:00
InlineSimple.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
Internalize.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
IPConstantPropagation.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
LoopExtractor.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
LowerSetJmp.cpp	Comment cleanups	2004-10-07 06:00:24 +00:00
Makefile	Added LLVM copyright notice to Makefiles.	2003-10-20 22:26:57 +00:00
PruneEH.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00
RaiseAllocations.cpp	'Pass' should now not be derived from by clients. Instead, they should derive	2004-09-20 04:48:05 +00:00