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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Analysis	Fix a nasty dangling pointer problem, due to a free'd pointer being left in	2004-10-07 20:01:31 +00:00
Archive	Changes For Bug 352	2004-09-01 22:55:40 +00:00
AsmParser	Add a check to avoid an assertion on malformed input	2004-10-09 02:18:58 +00:00
Bytecode	Fix doxygen comment	2004-09-28 16:57:46 +00:00
CodeGen	Hyphenate target-(in)dependent for more tasty grammar goodness (tm)	2004-10-08 19:43:31 +00:00
Debugger	Changes For Bug 352	2004-09-01 22:55:40 +00:00
ExecutionEngine	Convert code to compile with vc7.1.	2004-09-15 17:06:42 +00:00
Linker	Make sure the const bit gets inherited correctly when linking declarations	2004-10-05 02:28:11 +00:00
Support	Excise the ill-advised RLCOMP compression algorithm and simply leave the	2004-10-04 17:45:44 +00:00
System	Must include sys/stat.h before declaring a 'struct stat'	2004-10-05 18:46:59 +00:00
Target	Instead of silently breaking, print notification of why this doesn't work.	2004-10-09 21:13:51 +00:00
Transforms	Eliminate global pointers that are only stored a single value and null if	2004-10-09 21:48:45 +00:00
VMCore	Unfortunately the fix for the previous bug introduced the previous	2004-10-07 19:20:48 +00:00
Makefile	Wrap long line	2004-09-15 01:34:42 +00:00