Chris Lattner 610f1e2785 Codegen signed divides by 2 and -2 more efficiently. In particular ... instead of: s: ;; X / 2 movl 4(%esp), %eax movl %eax, %ecx shrl $31, %ecx movl %eax, %edx addl %ecx, %edx sarl $1, %eax ret t: ;; X / -2 movl 4(%esp), %eax movl %eax, %ecx shrl $31, %ecx movl %eax, %edx addl %ecx, %edx sarl $1, %eax negl %eax ret Emit: s: movl 4(%esp), %eax cmpl $-2147483648, %eax sbbl $-1, %eax sarl $1, %eax ret t: movl 4(%esp), %eax cmpl $-2147483648, %eax sbbl $-1, %eax sarl $1, %eax negl %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16760 91177308-0d34-0410-b5e6-96231b3b80d8		2004-10-06 04:02:39 +00:00
..
.cvsignore	Tell CVS to ignore all .inc files	2003-08-03 15:50:17 +00:00
Makefile	Add support for the -x86-asm-syntax flag, which can be used to choose between	2004-10-03 20:36:57 +00:00
X86.h	Add -sse[,2,3] arguments to LLC	2004-08-24 08:18:44 +00:00
X86.td	Add support for the -x86-asm-syntax flag, which can be used to choose between	2004-10-03 20:36:57 +00:00
X86AsmPrinter.cpp	* Prune #includes	2004-10-04 07:31:08 +00:00
X86CodeEmitter.cpp	Fix filename: Printer.cpp has become X86AsmPrinter.cpp	2004-09-12 21:26:04 +00:00
X86FloatingPoint.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
X86InstrBuilder.h	Reduce the number of arguments in the instruction builder and make some	2004-08-30 00:13:26 +00:00
X86InstrInfo.cpp	Fix a warning	2004-08-01 19:31:30 +00:00
X86InstrInfo.h	Remove a bunch of ad-hoc target-specific flags that were only used by the	2004-08-11 07:12:04 +00:00
X86InstrInfo.td	Add some new instructions. Fix the asm string for sbb32rr	2004-10-06 04:01:02 +00:00
X86ISelPattern.cpp	Disable the pattern isel	2004-08-15 23:02:17 +00:00
X86ISelSimple.cpp	Codegen signed divides by 2 and -2 more efficiently. In particular	2004-10-06 04:02:39 +00:00
X86JITInfo.h	Clean up a lot of the code I added yesterday by exposing the IntrinsicLowering	2003-12-28 21:23:38 +00:00
X86PeepholeOpt.cpp	Add some new instructions. Fix the asm string for sbb32rr	2004-10-06 04:01:02 +00:00
X86RegisterInfo.cpp	Add some new instructions. Fix the asm string for sbb32rr	2004-10-06 04:01:02 +00:00
X86RegisterInfo.h	Code insertion methods now return void instead of an int.	2004-08-15 22:15:11 +00:00
X86RegisterInfo.td	The real x87 floating point registers should not be allocatable. They	2004-09-21 21:22:11 +00:00
X86TargetMachine.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
X86TargetMachine.h	Auto-registrate target	2004-07-11 02:48:49 +00:00