Chris Lattner 43a5ff8d40 Emit x86 instructions for: A = B op C, where A and B are 16-bit registers, ... C is a constant which can be sign-extended from 8 bits without value loss, and op is one of: add, sub, imul, and, or, xor. This allows the JIT to emit the one byte version of the constant instead of the two or 4 byte version. Because these instructions are very common, this can save a LOT of code space. For example, I sampled two benchmarks, 176.gcc and 254.gap. BM Old New Reduction 176.gcc 2673621 2548962 4.89% 254.gap 498261 475104 4.87% Note that while the percentage is not spectacular, this did eliminate 124.6 _KILOBYTES_ of codespace from gcc. Not bad. Note that this doesn't effect the llc version at all, because the assembler already does this optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9284 91177308-0d34-0410-b5e6-96231b3b80d8		2003-10-20 05:53:31 +00:00
..
CBackend	Add support for the new varargs intrinsics and instructions	2003-10-18 05:57:43 +00:00
SparcV9	Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions.	2003-10-19 21:34:28 +00:00
X86	Emit x86 instructions for: A = B op C, where A and B are 16-bit registers,	2003-10-20 05:53:31 +00:00
Makefile
MRegisterInfo.cpp
Target.td	Add a bunch of new node types, including a new Void dummy register class	2003-08-15 04:35:14 +00:00
TargetData.cpp	Add support for 'any' pointer size and endianness	2003-08-24 13:49:22 +00:00
TargetInstrInfo.cpp
TargetMachine.cpp
TargetSchedInfo.cpp	Reformatted code to match the prevalent LLVM style; fit code into 80 columns.	2003-08-05 00:02:06 +00:00