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
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Analysis	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
Archive	Update file header for renamed file	2003-09-22 23:42:00 +00:00
AsmParser	Eliminate unused class	2003-10-19 21:39:41 +00:00
Bytecode	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
CodeGen	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
ExecutionEngine	Hrm, a relic from the past. How cute :)	2003-10-20 05:45:49 +00:00
Linker	Add support for 'weak' linkage.	2003-10-16 18:29:00 +00:00
Support	Add debugtype, make output marginally more nice	2003-10-19 02:27:40 +00:00
Target	Emit x86 instructions for: A = B op C, where A and B are 16-bit registers,	2003-10-20 05:53:31 +00:00
Transforms	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
VMCore	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
Makefile	Removed Support directory. It now lives in llvm/support/lib.	2003-09-29 16:10:43 +00:00