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
..
SelectionDAG	Make sure operand does have size and element type operands.	2006-10-17 17:06:35 +00:00
AsmPrinter.cpp	Clean up interface to getGlobalLinkName.	2006-10-17 17:17:24 +00:00
BranchFolding.cpp	Enable deleting branches to successor blocks. With the previous patches,	2006-10-17 18:16:40 +00:00
DwarfWriter.cpp	Clean up interface to getGlobalLinkName.	2006-10-17 17:17:24 +00:00
ELFWriter.cpp
IntrinsicLowering.cpp
LiveInterval.cpp
LiveIntervalAnalysis.cpp
LiveVariables.cpp	Fix for PR929. The PHI nodes were being gone through for each instruction	2006-10-03 07:20:20 +00:00
LLVMTargetMachine.cpp	add the branch folding pass as a late cleanup pass for all targets. For now	2006-10-13 20:45:56 +00:00
MachineBasicBlock.cpp	print labels even if a MBB doesn't have a corresponding LLVM BB, just don't	2006-10-06 21:28:17 +00:00
MachineDebugInfo.cpp	Clean up dump.	2006-10-13 13:01:34 +00:00
MachineFunction.cpp	Bugfixes	2006-10-03 20:19:23 +00:00
MachineInstr.cpp
MachinePassRegistry.cpp
MachOWriter.cpp
Makefile
Passes.cpp
PHIElimination.cpp	"Once more into the breach, dear friends, once more, or fill the wall up	2006-09-28 07:10:24 +00:00
PhysRegTracker.h
PrologEpilogInserter.cpp	TargetRegisterClass specifies the desired spill alignment. However, it cannot be honored if stack alignment is smaller.	2006-09-28 18:52:32 +00:00
RegAllocLinearScan.cpp
RegAllocLocal.cpp	Fix UnitTests/2005-05-12-Int64ToFP.c with llc-beta. In particular, do not	2006-09-19 18:02:01 +00:00
RegAllocSimple.cpp
TwoAddressInstructionPass.cpp
UnreachableBlockElim.cpp
VirtRegMap.cpp	restore my previous patch, now that the X86 backend bug has been fixed:	2006-10-12 17:45:38 +00:00
VirtRegMap.h