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Disentangle -march and -mcpu.

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-mcpu=native now actually works.

GitHub: Fixes #414.
This commit is contained in:
David Nadlinger
2013-10-06 01:41:13 +02:00
parent 02abf028f8
commit d17aa2aaac
1 changed files with 8 additions and 11 deletions
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19
driver/targetmachine.cpp
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@@ -23,14 +23,14 @@
#include "mars.h"
static std::string getX86TargetCPU(std::string arch,
static std::string getX86TargetCPU(const std::string &cpu,
const llvm::Triple &triple)
{
if (!arch.empty()) {
if (arch != "native")
return arch;
if (!cpu.empty()) {
if (cpu != "native")
return cpu;
// FIXME: Reject attempts to use -march=native unless the target matches
// FIXME: Reject attempts to use -mcpu=native unless the target matches
// the host.
//
// FIXME: We should also incorporate the detected target features for use
@@ -118,13 +118,10 @@ llvm::TargetMachine* createTargetMachine(
// With an empty CPU string, LLVM will default to the host CPU, which is
// usually not what we want (expected behavior from other compilers is
// to default to "generic").
if (cpu.empty())
if (triple.getArch() == llvm::Triple::x86_64 ||
triple.getArch() == llvm::Triple::x86)
{
if (triple.getArch() == llvm::Triple::x86_64 ||
triple.getArch() == llvm::Triple::x86)
{
cpu = getX86TargetCPU(arch, triple);
}
cpu = getX86TargetCPU(cpu, triple);
}
// Package up features to be passed to target/subtarget