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Switch CPU names not recognized by GNU assembler 

Summary:
Switch CPU names not recognized by GNU assembler to a close CPU that it
does recognize.  In this patch, kryo, falkor and saphira all get
replaced by cortex-a57 when invoking the assembler.  In addition, krait
was already being replaced by cortex-a15.

Reviewers: weimingz

Subscribers: srhines, cfe-commits

Differential Revision: https://reviews.llvm.org/D40476

llvm-svn: 319077
This commit is contained in:
Pirama Arumuga Nainar 2017-11-27 19:18:39 +00:00
parent 4414b08bb1
commit 87ff0a7467
2 changed files with 38 additions and 10 deletions
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31
clang/lib/Driver/ToolChains/Gnu.cpp
View File

@ -42,6 +42,24 @@ static bool forwardToGCC(const Option &O) {
!O.hasFlag(options::DriverOption) && !O.hasFlag(options::LinkerInput);
}
// Switch CPU names not recognized by GNU assembler to a close CPU that it does
// recognize, instead of a lower march from being picked in the absence of a cpu
// flag.
static void normalizeCPUNamesForAssembler(const ArgList &Args,
ArgStringList &CmdArgs) {
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
StringRef CPUArg(A->getValue());
if (CPUArg.equals_lower("krait"))
CmdArgs.push_back("-mcpu=cortex-a15");
else if(CPUArg.equals_lower("kryo") ||
CPUArg.equals_lower("falkor") ||
CPUArg.equals_lower("saphira"))
CmdArgs.push_back("-mcpu=cortex-a57");
else
Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
}
}
void tools::gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs,
@ -652,23 +670,16 @@ void tools::gnutools::Assembler::ConstructJob(Compilation &C,
}
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
// FIXME: remove krait check when GNU tools support krait cpu
// for now replace it with -mcpu=cortex-a15 to avoid a lower
// march from being picked in the absence of a cpu flag.
Arg *A;
if ((A = Args.getLastArg(options::OPT_mcpu_EQ)) &&
StringRef(A->getValue()).equals_lower("krait"))
CmdArgs.push_back("-mcpu=cortex-a15");
else
Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
Args.AddLastArg(CmdArgs, options::OPT_mfpu_EQ);
break;
}
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_be: {
Args.AddLastArg(CmdArgs, options::OPT_march_EQ);
Args.AddLastArg(CmdArgs, options::OPT_mcpu_EQ);
normalizeCPUNamesForAssembler(Args, CmdArgs);
break;
}
case llvm::Triple::mips:

17
clang/test/Driver/as-mcpu.c Normal file
View File

@ -0,0 +1,17 @@
// ================== Check that krait is substituted by cortex-a15 when invoking
// the assembler
// RUN: %clang -target arm-linux -mcpu=krait -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A15 %s
// CHECK-CORTEX-A15: as{{(.exe)?}}" "{{.*}}-mcpu=cortex-a15
// ================== Check that kryo is substituted by cortex-a57 when invoking
// the assembler
// RUN: %clang -target arm-linux -mcpu=kryo -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// RUN: %clang -target aarch64-linux -mcpu=kryo -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// RUN: %clang -target arm-linux -mcpu=falkor -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// RUN: %clang -target aarch64-linux -mcpu=falkor -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// RUN: %clang -target arm-linux -mcpu=saphira -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// RUN: %clang -target aarch64-linux -mcpu=saphira -### -c %s -v -fno-integrated-as 2>&1 | FileCheck -check-prefix=CHECK-CORTEX-A57 %s
// CHECK-CORTEX-A57: as{{(.exe)?}}" "{{.*}}-mcpu=cortex-a57