Chris Lattner ffddf6ba1c 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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31006 91177308-0d34-0410-b5e6-96231b3b80d8		2006-10-17 18:16:40 +00:00
..
Analysis	Move some warnings to debug mode.	2006-10-13 17:38:22 +00:00
Archive
AsmParser	regenerate	2006-10-15 23:27:25 +00:00
Bytecode	Fix massive resource leaks in the bytecode reader. Reading a bytecode file	2006-10-12 18:32:30 +00:00
CodeGen	Enable deleting branches to successor blocks. With the previous patches,	2006-10-17 18:16:40 +00:00
Debugger
ExecutionEngine
Linker
Support	avoid a ctor/dtor issue with the ProgramName global.	2006-10-13 00:06:24 +00:00
System
Target	add support for inserting an uncond branch	2006-10-17 18:06:55 +00:00
Transforms	Undo Chris' last patch, it caused a regression.	2006-10-16 23:08:08 +00:00
VMCore	label* is not a valid type, add an assertion.	2006-10-15 23:21:12 +00:00
Makefile