diff options
Diffstat (limited to 'docs/tools/clang.pod')
| -rw-r--r-- | docs/tools/clang.pod | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/docs/tools/clang.pod b/docs/tools/clang.pod index 9f7a448..704cc87 100644 --- a/docs/tools/clang.pod +++ b/docs/tools/clang.pod @@ -7,7 +7,7 @@ clang - the Clang C, C++, and Objective-C compiler =head1 SYNOPSIS B<clang> [B<-c>|B<-S>|B<-E>] B<-std=>I<standard> B<-g> - [B<-O0>|B<-O1>|B<-O2>|B<-Os>|B<-O3>|B<-O4>] + [B<-O0>|B<-O1>|B<-O2>|B<-Os>|B<-Oz>|B<-O3>|B<-O4>] B<-W>I<warnings...> B<-pedantic> B<-I>I<dir...> B<-L>I<dir...> B<-D>I<macro[=defn]> @@ -53,7 +53,7 @@ parse errors. The output of this stage is an "Abstract Syntax Tree" (AST). This stage translates an AST into low-level intermediate code (known as "LLVM IR") and ultimately to machine code. This phase is responsible for optimizing -the generated code and handling target-specfic code generation. The output of +the generated code and handling target-specific code generation. The output of this stage is typically called a ".s" file or "assembly" file. Clang also supports the use of an integrated assembler, in which the code @@ -263,12 +263,13 @@ may not exist on earlier ones. =over -=item B<-O0> B<-O1> B<-O2> B<-Os> B<-O3> B<-O4> +=item B<-O0> B<-O1> B<-O2> B<-Os> B<-Oz> B<-O3> B<-O4> Specify which optimization level to use. B<-O0> means "no optimization": this level compiles the fastest and generates the most debuggable code. B<-O2> is a moderate level of optimization which enables most optimizations. B<-Os> is like -B<-O2> with extra optimizations to reduce code size. B<-O3> is like B<-O2>, +B<-O2> with extra optimizations to reduce code size. B<-Oz> is like B<-Os> +(and thus B<-O2>), but reduces code size further. B<-O3> is like B<-O2>, except that it enables optimizations that take longer to perform or that may generate larger code (in an attempt to make the program run faster). On supported platforms, B<-O4> enables link-time optimization; object files are @@ -356,18 +357,10 @@ Pass I<arg> to the static analyzer. Pass I<arg> to the assembler. -=item B<-Xclang> I<arg> - -Pass I<arg> to the clang compiler frontend. - =item B<-Xlinker> I<arg> Pass I<arg> to the linker. -=item B<-mllvm> I<arg> - -Pass I<arg> to the LLVM backend. - =item B<-Xpreprocessor> I<arg> Pass I<arg> to the preprocessor. |
