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Options: Use AliasArgs for -O -> -O2 translation. 

This way we can do the translation in the .td file rather than manually.

llvm-svn: 187583
This commit is contained in:
Hans Wennborg 2013-08-01 16:21:57 +00:00
parent 0344cdfe39
commit a203b50317
3 changed files with 12 additions and 5 deletions
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1
clang/include/clang/Driver/Options.td
View File

@ -220,6 +220,7 @@ def ObjCXX : Flag<["-"], "ObjC++">, Flags<[DriverOption]>,
def ObjC : Flag<["-"], "ObjC">, Flags<[DriverOption]>,
HelpText<"Treat source input files as Objective-C inputs">;
def O : Joined<["-"], "O">, Group<O_Group>, Flags<[CC1Option]>;
def O_flag : Flag<["-"], "O">, Flags<[CC1Option]>, Alias<O>, AliasArgs<["2"]>;
def Ofast : Joined<["-"], "Ofast">, Group<O_Group>, Flags<[CC1Option]>;
def P : Flag<["-"], "P">, Flags<[CC1Option]>,
HelpText<"Disable linemarker output in -E mode">;

6
clang/lib/Driver/Tools.cpp
View File

@ -2705,14 +2705,10 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
// preprocessed inputs and configure concludes that -fPIC is not supported.
Args.ClaimAllArgs(options::OPT_D);
// Manually translate -O to -O2 and -O4 to -O3; let clang reject
// others.
// Manually translate -O4 to -O3; let clang reject others.
if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
if (A->getOption().matches(options::OPT_O4))
CmdArgs.push_back("-O3");
else if (A->getOption().matches(options::OPT_O) &&
A->getValue()[0] == '\0')
CmdArgs.push_back("-O2");
else
A->render(Args, CmdArgs);
}

10
clang/test/Driver/O.c Normal file
View File

@ -0,0 +1,10 @@
// Test that we parse and translate the -O option correctly.
// RUN: %clang -O -### %s 2>&1 | FileCheck -check-prefix=CHECK-O %s
// CHECK-O: -O2
// RUN: %clang -O0 -### %s 2>&1 | FileCheck -check-prefix=CHECK-O0 %s
// CHECK-O0: -O0
// RUN: %clang -O1 -### %s 2>&1 | FileCheck -check-prefix=CHECK-O1 %s
// CHECK-O1: -O1