114 Commits

Author	SHA1	Message	Date
Chris Lattner	cd00328fad	Teach the branch folder to update debug info if it removes blocks with line ... # notes in it. llvm-svn: 31026	2006-10-17 23:17:27 +00:00
Chris Lattner	ef7c2e1dc8	Enable deleting branches to successor blocks. With the previous patches, ... branch folding can now compile stuff like this: void foo(int W, int X, int Y, int Z) { if (W & 1) { for (; X;--X) bar(); } else if (W & 2) { for (; Y;--Y) bar(); } else if (W & 4) { for (; Z;--Z) bar(); } else if (W & 8) { for (; W;--W) bar(); } if (W) { bar(); } } contrived testcase where loops exits all end up merging together. To have the loop merges be: ... cmplw cr0, r30, r27 bne cr0, LBB1_14 ;bb38 LBB1_16: ;cond_next48.loopexit mr r27, r29 LBB1_20: ;cond_next48 cmplwi cr0, r27, 0 beq cr0, LBB1_22 ;UnifiedReturnBlock ... instead of: ... cmplw cr0, r30, r27 bne cr0, LBB1_14 ;bb38 LBB1_16: ;cond_next48.loopexit mr r27, r29 b LBB1_20 ;cond_next48 LBB1_17: ;cond_next48.loopexit1 b LBB1_20 ;cond_next48 LBB1_18: ;cond_next48.loopexit2 b LBB1_20 ;cond_next48 LBB1_19: ;cond_next48.loopexit3 LBB1_20: ;cond_next48 cmplwi cr0, r27, 0 beq cr0, LBB1_22 ;UnifiedReturnBlock ... This is CodeGen/PowerPC/branch-opt.ll llvm-svn: 31006	2006-10-17 18:16:40 +00:00
Chris Lattner	8464c7e3e1	Reenable this pass, fixing the bugs in it. ... It now correctly deletes unreachable blocks and blocks that are empty. llvm-svn: 31000	2006-10-17 17:13:52 +00:00
Chris Lattner	c4be6ee8b8	disable this pass for now, it's causing issues ... llvm-svn: 30951	2006-10-14 00:30:06 +00:00
Chris Lattner	1c35d27fc4	falling off the end of a function is ok with an unreachable instruction. ... llvm-svn: 30950	2006-10-14 00:21:48 +00:00
Chris Lattner	ae19ea4b2a	disable some objectionable code, maybe we can bring this pass to life ... llvm-svn: 30939	2006-10-13 20:43:10 +00:00
Misha Brukman	774e55c446	Remove trailing whitespace ... llvm-svn: 21420	2005-04-21 22:36:52 +00:00
Reid Spencer	c4abcbefb1	Changes For Bug 352 ... Move include/Config and include/Support into include/llvm/Config, include/llvm/ADT and include/llvm/Support. From here on out, all LLVM public header files must be under include/llvm/. llvm-svn: 16137	2004-09-01 22:55:40 +00:00
Chris Lattner	786c788d12	Dereferencing end() is bad. ... llvm-svn: 15402	2004-08-01 09:51:42 +00:00
Alkis Evlogimenos	1dd3ea5515	Make OptimizeBlock take a MachineFunction::iterator instead of a ... MachineBasicBlock* as a parameter so that nxext() and prior() helper functions can work naturally on it. llvm-svn: 15376	2004-07-31 19:24:41 +00:00
Chris Lattner	ecca71ce92	Next on a pointer increments the pointer, not an iterator ... llvm-svn: 15375	2004-07-31 18:40:36 +00:00
Alkis Evlogimenos	b28bc78d0a	Use next() helper to make code more readable. Use ... MachineFunction::iterator instead of MachineBasicBlock* to avoid dereferencing end iterators. llvm-svn: 15373	2004-07-31 15:14:29 +00:00
Alkis Evlogimenos	143aeb646c	Use MachineFunction::iterator instead of a MachineBasicBlock* because ... FallThrough maybe == to MF.end(). llvm-svn: 15372	2004-07-31 15:03:52 +00:00
Chris Lattner	7b12b8a13e	Implement a simple target-independent CFG cleanup pass ... llvm-svn: 15368	2004-07-31 10:01:27 +00:00