mirror of
https://github.com/intel/llvm.git
synced 2026-01-16 05:32:28 +08:00
d4e0fe62b1
Owing to the large number of instantiations of this function, this small
change has a small but meaningful difference on the total size of
(especially a debug) build of clang at -O0:
```
FILE SIZE VM SIZE
-------------- --------------
+0.9% +96.9Ki +0.9% +96.9Ki .data.rel.ro
+0.7% +96.7Ki +0.7% +96.7Ki .rela.dyn
+0.0% +18.3Ki +0.0% +18.3Ki .rodata
+0.0% +324 [ = ] 0 [2 Others]
-0.2% -392 -0.2% -392 .gnu.version
-0.0% -441 [ = ] 0 .debug_abbrev
-0.1% -980 -0.1% -980 .gnu.hash
-0.2% -1.53Ki -0.2% -1.53Ki .hash
-0.2% -4.59Ki -0.2% -4.59Ki .dynsym
-0.1% -10.5Ki [ = ] 0 .debug_rnglists
-0.6% -59.0Ki -0.6% -59.0Ki .dynstr
-0.2% -191Ki [ = ] 0 .debug_str_offsets
-3.0% -233Ki -3.0% -233Ki .eh_frame_hdr
-0.7% -244Ki [ = ] 0 .debug_addr
-2.9% -699Ki [ = ] 0 .symtab
-0.6% -884Ki [ = ] 0 .debug_line
-3.0% -932Ki -3.0% -932Ki .eh_frame
-1.0% -1.48Mi -1.0% -1.48Mi .text
-0.6% -2.75Mi [ = ] 0 .debug_info
-7.3% -8.61Mi [ = ] 0 .strtab
-7.3% -17.2Mi [ = ] 0 .debug_str
-2.4% -33.0Mi -0.9% -2.47Mi TOTAL
```
If anyone's got other ideas for how to reduce this further - it's not
especially important, I just came across it while investigating a debug
info size regression, but thought it was interesting enough to poke
around at.
//===----------------------------------------------------------------------===// // 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 forums: https://discourse.llvm.org/c/clang/ If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/