Chris Lattner ea03e10fac Implement rdar://7415680 - Twine integer support lacks greatness ... Microoptimize Twine's with unsigned and int to not pin their value to the stack. This saves stack space in common cases and allows mem2reg in the caller. A simple example is: void foo(const Twine &); void bar(int x) { foo("xyz: " + Twine(x)); } Before: __Z3bari: subq $40, %rsp movl %edi, 36(%rsp) leaq L_.str3(%rip), %rax leaq 36(%rsp), %rcx leaq 8(%rsp), %rdi movq %rax, 8(%rsp) movq %rcx, 16(%rsp) movb $3, 24(%rsp) movb $7, 25(%rsp) callq __Z3fooRKN4llvm5TwineE addq $40, %rsp ret After: __Z3bari: subq $24, %rsp leaq L_.str3(%rip), %rax movq %rax, (%rsp) movslq %edi, %rax movq %rax, 8(%rsp) movb $3, 16(%rsp) movb $7, 17(%rsp) leaq (%rsp), %rdi callq __Z3fooRKN4llvm5TwineE addq $24, %rsp ret It saves 16 bytes of stack and one instruction in this case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103107 91177308-0d34-0410-b5e6-96231b3b80d8		2010-05-05 18:40:33 +00:00
..
Analysis	Use the SCEVAddRecExpr::getPostIncExpr utility function instead	2010-05-04 01:12:27 +00:00
Archive	silence a warning, patch by "mike".	2010-04-25 04:44:26 +00:00
AsmParser	Remove the API compatibility layer which converted add, sub, and mul	2010-05-03 22:44:19 +00:00
Bitcode	Revert 101465, it broke internal OpenGL testing.	2010-04-16 23:37:20 +00:00
CodeGen	Teach liveintervalanalysis about virtual registers which are defined by reg_sequence instructions that are formed by registers defined by distinct instructions. e.g.	2010-05-05 18:27:40 +00:00
CompilerDriver
ExecutionEngine	Remove the -enable-sjlj-eh option, which doesn't do anything.	2010-05-02 15:36:26 +00:00
Linker
MC	MC: Rename MCSymbol::{g,s}etValue -> MCSymbol::{g,s}etVariableValue.	2010-05-05 17:41:00 +00:00
Support	Implement rdar://7415680 - Twine integer support lacks greatness	2010-05-05 18:40:33 +00:00
System	This doesn't need SmallVector.h anymore.	2010-04-19 17:51:31 +00:00
Target	Model CONCAT_VECTORS of two 64-bit values as a REG_SEQUENCE.	2010-05-05 18:28:36 +00:00
Transforms	Combine the implementations of the core part of the SSAUpdater and	2010-05-04 23:18:19 +00:00
VMCore	Fix a problem exposed by my previous commit and noticed by a release-asserts	2010-05-04 14:25:42 +00:00
Makefile