Chris Lattner 26d2990e03 Lower X%C into X/C+stuff. This allows the 'division by a constant' logic to ... apply to rems as well as divs. This fixes PR945 and speeds up ReedSolomon from 14.57s to 10.90s (which is now faster than gcc). It compiles CodeGen/X86/rem.ll into: _test1: subl $4, %esp movl %esi, (%esp) movl $2155905153, %ecx movl 8(%esp), %esi movl %esi, %eax imull %ecx addl %esi, %edx movl %edx, %eax shrl $31, %eax sarl $7, %edx addl %eax, %edx imull $255, %edx, %eax subl %eax, %esi movl %esi, %eax movl (%esp), %esi addl $4, %esp ret _test2: movl 4(%esp), %eax movl %eax, %ecx sarl $31, %ecx shrl $24, %ecx addl %eax, %ecx andl $4294967040, %ecx subl %ecx, %eax ret _test3: subl $4, %esp movl %esi, (%esp) movl $2155905153, %ecx movl 8(%esp), %esi movl %esi, %eax mull %ecx shrl $7, %edx imull $255, %edx, %eax subl %eax, %esi movl %esi, %eax movl (%esp), %esi addl $4, %esp ret instead of div/idiv instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30920 91177308-0d34-0410-b5e6-96231b3b80d8		2006-10-12 20:58:32 +00:00
..
SelectionDAG	Lower X%C into X/C+stuff. This allows the 'division by a constant' logic to	2006-10-12 20:58:32 +00:00
AsmPrinter.cpp	Jimptables working again on alpha.	2006-10-11 04:29:42 +00:00
BranchFolding.cpp
DwarfWriter.cpp	More long term solution	2006-10-04 10:40:15 +00:00
ELFWriter.cpp
IntrinsicLowering.cpp
LiveInterval.cpp	When joining two intervals where the RHS is really simple, use a light-weight	2006-09-02 05:26:59 +00:00
LiveIntervalAnalysis.cpp	Keep track of the start of MBB's in a separate map from instructions. This	2006-09-15 03:57:23 +00:00
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 setJumpBufSize() and setJumpBufAlignment() to target-lowering.	2006-09-04 06:21:35 +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	Adding C++ member support.	2006-08-21 21:20:18 +00:00
MachineFunction.cpp	Bugfixes	2006-10-03 20:19:23 +00:00
MachineInstr.cpp	Only call isUse/isDef on register operands	2006-09-05 20:19:27 +00:00
MachinePassRegistry.cpp	Final polish on machine pass registries.	2006-08-02 12:30:23 +00:00
MachOWriter.cpp	Behold, more work on relocations. Things are looking pretty good now.	2006-09-10 23:03:44 +00:00
Makefile	Fix linking on Alpha	2006-07-20 17:27:58 +00:00
Passes.cpp	Work around a bug in gcc 3.3.5, reported by a user	2006-08-03 00:16:56 +00:00
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	s|llvm/Support/Visibility.h|llvm/Support/Compiler.h|	2006-08-27 12:54:02 +00:00
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	Fix a long-standing wart in the code generator: two-address instruction lowering	2006-09-05 02:12:02 +00:00
TwoAddressInstructionPass.cpp	Fix a long-standing wart in the code generator: two-address instruction lowering	2006-09-05 02:12:02 +00:00
UnreachableBlockElim.cpp	eliminate RegisterOpt. It does the same thing as RegisterPass.	2006-08-27 22:42:52 +00:00
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	Fix a long-standing wart in the code generator: two-address instruction lowering	2006-09-05 02:12:02 +00:00