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[clang][Arm] Fix handling of -Wa,-implicit-it= 

Similiar to D95872, this flag can be set for the assembler directly.
Move validation code into a reusable helper function.

Link: https://bugs.llvm.org/show_bug.cgi?id=49023
Link: https://github.com/ClangBuiltLinux/linux/issues/1270
Reported-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>

Reviewed By: DavidSpickett

Differential Revision: https://reviews.llvm.org/D96285
This commit is contained in:
Nick Desaulniers 2021-02-11 09:00:11 -08:00
parent 81c51891ad
commit a680bc3a31
2 changed files with 59 additions and 6 deletions
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21
clang/lib/Driver/ToolChains/Clang.cpp
View File

@ -2304,6 +2304,17 @@ void Clang::DumpCompilationDatabaseFragmentToDir(
DumpCompilationDatabase(C, "", Target, Output, Input, Args);
}
static bool AddARMImplicitITArgs(const ArgList &Args, ArgStringList &CmdArgs,
StringRef Value) {
if (Value == "always" || Value == "never" || Value == "arm" ||
Value == "thumb") {
CmdArgs.push_back("-mllvm");
CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
return true;
}
return false;
}
static void CollectArgsForIntegratedAssembler(Compilation &C,
const ArgList &Args,
ArgStringList &CmdArgs,
@ -2327,15 +2338,10 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
case llvm::Triple::thumbeb:
if (Arg *A = Args.getLastArg(options::OPT_mimplicit_it_EQ)) {
StringRef Value = A->getValue();
if (Value == "always" || Value == "never" || Value == "arm" ||
Value == "thumb") {
CmdArgs.push_back("-mllvm");
CmdArgs.push_back(Args.MakeArgString("-arm-implicit-it=" + Value));
} else {
if (!AddARMImplicitITArgs(Args, CmdArgs, Value))
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getOption().getName() << Value;
}
}
break;
default:
break;
@ -2376,6 +2382,9 @@ static void CollectArgsForIntegratedAssembler(Compilation &C,
case llvm::Triple::thumbeb:
case llvm::Triple::arm:
case llvm::Triple::armeb:
if (Value.startswith("-mimplicit-it=") &&
AddARMImplicitITArgs(Args, CmdArgs, Value.split("=").second))
continue;
if (Value == "-mthumb")
// -mthumb has already been processed in ComputeLLVMTriple()
// recognize but skip over here.

44
clang/test/Driver/arm-target-as-mimplicit-it.s Normal file
View File

@ -0,0 +1,44 @@
/// Simple tests for valid input.
/// -Wa,-implicit-it=
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always %s 2>&1 | FileCheck %s --check-prefix=ALWAYS
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=never %s 2>&1 | FileCheck %s --check-prefix=NEVER
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=arm %s 2>&1 | FileCheck %s --check-prefix=ARM
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=thumb %s 2>&1 | FileCheck %s --check-prefix=THUMB
/// -Xassembler -mimplicit-it=
// RUN: %clang -target arm-linux-gnueabi -### -Xassembler -mimplicit-it=always %s 2>&1 | FileCheck %s --check-prefix=ALWAYS
// RUN: %clang -target arm-linux-gnueabi -### -Xassembler -mimplicit-it=never %s 2>&1 | FileCheck %s --check-prefix=NEVER
// RUN: %clang -target arm-linux-gnueabi -### -Xassembler -mimplicit-it=arm %s 2>&1 | FileCheck %s --check-prefix=ARM
// RUN: %clang -target arm-linux-gnueabi -### -Xassembler -mimplicit-it=thumb %s 2>&1 | FileCheck %s --check-prefix=THUMB
/// Test space separated -Wa,- arguments (latter wins).
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=never -Wa,-mimplicit-it=always %s 2>&1 | FileCheck %s --check-prefix=ALWAYS
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always -Wa,-mimplicit-it=never %s 2>&1 | FileCheck %s --check-prefix=NEVER
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always -Wa,-mimplicit-it=arm %s 2>&1 | FileCheck %s --check-prefix=ARM
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always -Wa,-mimplicit-it=thumb %s 2>&1 | FileCheck %s --check-prefix=THUMB
/// Test comma separated -Wa,- arguments (latter wins).
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=never,-mimplicit-it=always %s 2>&1 | FileCheck %s --check-prefix=ALWAYS
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always,-mimplicit-it=never %s 2>&1 | FileCheck %s --check-prefix=NEVER
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always,-mimplicit-it=arm %s 2>&1 | FileCheck %s --check-prefix=ARM
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always,-mimplicit-it=thumb %s 2>&1 | FileCheck %s --check-prefix=THUMB
/// Mix -implicit-it= (compiler) with -Wa,-mimplicit-it= (assembler), assembler
/// takes priority. -mllvm -arm-implicit-it= will be repeated, with the
/// assembler flag appearing last (latter wins).
// RUN: %clang -target arm-linux-gnueabi -### -mimplicit-it=never -Wa,-mimplicit-it=always %S/Inputs/wildcard1.c 2>&1 | FileCheck %s --check-prefix=NEVER_ALWAYS
// RUN: %clang -target arm-linux-gnueabi -### -mimplicit-it=always -Wa,-mimplicit-it=never %S/Inputs/wildcard1.c 2>&1 | FileCheck %s --check-prefix=ALWAYS_NEVER
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=never -mimplicit-it=always %S/Inputs/wildcard1.c 2>&1 | FileCheck %s --check-prefix=ALWAYS_NEVER
/// Test invalid input.
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=foo %s 2>&1 | FileCheck %s --check-prefix=INVALID
// RUN: %clang -target arm-linux-gnueabi -### -Xassembler -mimplicit-it=foo %s 2>&1 | FileCheck %s --check-prefix=XINVALID
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always -Wa,-mimplicit-it=foo %s 2>&1 | FileCheck %s --check-prefix=INVALID
// RUN: %clang -target arm-linux-gnueabi -### -Wa,-mimplicit-it=always,-mimplicit-it=foo %s 2>&1 | FileCheck %s --check-prefix=INVALID
// ALWAYS: "-mllvm" "-arm-implicit-it=always"
// NEVER: "-mllvm" "-arm-implicit-it=never"
// ARM: "-mllvm" "-arm-implicit-it=arm"
// THUMB: "-mllvm" "-arm-implicit-it=thumb"
// NEVER_ALWAYS: "-mllvm" "-arm-implicit-it=never" "-mllvm" "-arm-implicit-it=always"
// ALWAYS_NEVER: "-mllvm" "-arm-implicit-it=always" "-mllvm" "-arm-implicit-it=never"
// INVALID: error: unsupported argument '-mimplicit-it=foo' to option 'Wa,'
// XINVALID: error: unsupported argument '-mimplicit-it=foo' to option 'Xassembler'