forked from OSchip/llvm-project
6673d69226
The PREFETCHW instruction was originally part of the 3DNow. But it was given its own CPUID bit on later CPUs just before 3DNow was deprecated. We were setting the -mprfchw flag if -m3dnow was passed or the CPU supported 3dnow unless -mno-prfchw was passed. But -march=native on a CPU without the PRFCHW CPUID bit set will pass -mno-prfchw. So -march=k8 will behave differently than -march=native on a K8 for example. So remove this implicit setting from the frontend and instead enable the backend to use PREFETCHW if 3dnow OR prfchw is enabled. Also enable PRFCHW flag on amdfam10/barcelona which seems to be where this CPUID bit was introduced. That CPU also supported 3dnow. |
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| INPUTS | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| runtime | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| ModuleInfo.txt | ||
| NOTES.txt | ||
| README.txt | ||
README.txt
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang development mailing list: http://lists.llvm.org/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/