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dd30b47175
llvm-6502/lib
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Preston Gurd dd30b47175 The current Intel Atom microarchitecture has a feature whereby when a function 
returns early then it is slightly faster to execute a sequence of NOP
instructions to wait until the return address is ready,
as opposed to simply stalling on the ret instruction
until the return address is ready.

When compiling for X86 Atom only, this patch will run a pass, called
"X86PadShortFunction" which will add NOP instructions where less than four
cycles elapse between function entry and return.

It includes tests.

Patch by Andy Zhang.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171524 91177308-0d34-0410-b5e6-96231b3b80d8
2013-01-04 20:54:54 +00:00
..
Analysis Memory Dependence Analysis: fix a miscompile that uses DT to approxmiate the 2013-01-04 19:19:47 +00:00
Archive Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
AsmParser Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
Bitcode Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
CodeGen small fixes to enable the reuse of the pass manager across multiple modules 2013-01-04 18:04:42 +00:00
DebugInfo Add a space to the end of the line so we don't get "itsbounds" in output. 2013-01-04 18:30:36 +00:00
ExecutionEngine [Object][ELF] Add a maximum alignment. This is used by createELFObjectFile to create a properly aligned reader. 2013-01-04 20:36:28 +00:00
IR General cleanups. 2013-01-04 20:54:35 +00:00
Linker Move all of the header files which are involved in modelling the LLVM IR 2013-01-02 11:36:10 +00:00
MC PowerPC: Fix eh_frame relocation for PIC 2013-01-04 19:08:13 +00:00
Object [Object][ELF] Add a maximum alignment. This is used by createELFObjectFile to create a properly aligned reader. 2013-01-04 20:36:28 +00:00
Option
Support Fix how YAML I/O detects flow sequences. 2013-01-04 19:32:00 +00:00
TableGen
Target The current Intel Atom microarchitecture has a feature whereby when a function 2013-01-04 20:54:54 +00:00
Transforms Move the loop vectorizer from O2 to O3. It looks like the increase in code size actually hurts the performance on many programs. 2013-01-04 17:57:44 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile