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Support -masm= flag for x86 targets. 

`clang -S -o - file.c -masm=att` will write assembly to stdout in at&t syntax
(the default), `-masm=intel` will instead output intel style asm.

llvm-svn: 208683
This commit is contained in:
Nico Weber 2014-05-13 11:11:24 +00:00
parent 7d07fe20a0
commit ad8e36c41a
3 changed files with 24 additions and 0 deletions
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1
clang/include/clang/Driver/Options.td
View File

@ -1005,6 +1005,7 @@ def m3dnow : Flag<["-"], "m3dnow">, Group<m_x86_Features_Group>;
def m64 : Flag<["-"], "m64">, Group<m_Group>, Flags<[DriverOption, CoreOption]>;
def mabi_EQ : Joined<["-"], "mabi=">, Group<m_Group>;
def march_EQ : Joined<["-"], "march=">, Group<m_Group>;
def masm_EQ : Joined<["-"], "masm=">, Group<m_Group>, Flags<[DriverOption]>;
def mcmodel_EQ : Joined<["-"], "mcmodel=">, Group<m_Group>;
def mconstant_cfstrings : Flag<["-"], "mconstant-cfstrings">, Group<clang_ignored_m_Group>;
def mcpu_EQ : Joined<["-"], "mcpu=">, Group<m_Group>;

11
clang/lib/Driver/Tools.cpp
View File

@ -1486,6 +1486,17 @@ void Clang::AddX86TargetArgs(const ArgList &Args,
}
if (NoImplicitFloat)
CmdArgs.push_back("-no-implicit-float");
if (Arg *A = Args.getLastArg(options::OPT_masm_EQ)) {
StringRef Value = A->getValue();
if (Value == "intel" || Value == "att") {
CmdArgs.push_back("-mllvm");
CmdArgs.push_back(Args.MakeArgString("-x86-asm-syntax=" + Value));
} else {
getToolChain().getDriver().Diag(diag::err_drv_unsupported_option_argument)
<< A->getOption().getName() << Value;
}
}
}
static inline bool HasPICArg(const ArgList &Args) {

12
clang/test/Driver/masm.c Normal file
View File

@ -0,0 +1,12 @@
// RUN: %clang -target i386-unknown-linux -masm=intel %s -S -o - | FileCheck --check-prefix=CHECK-INTEL %s
// RUN: %clang -target i386-unknown-linux -masm=att %s -S -o - | FileCheck --check-prefix=CHECK-ATT %s
// RUN: not %clang -target i386-unknown-linux -masm=somerequired %s -S -o - 2>&1 | FileCheck --check-prefix=CHECK-SOMEREQUIRED %s
// RUN: %clang -target arm-unknown-eabi -masm=intel %s -S -o - 2>&1 | FileCheck --check-prefix=CHECK-ARM %s
int f() {
// CHECK-ATT: movl $0, %eax
// CHECK-INTEL: mov eax, 0
// CHECK-SOMEREQUIRED: error: unsupported argument 'somerequired' to option 'masm='
// CHECK-ARM: warning: argument unused during compilation: '-masm=intel'
return 0;
}