6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-29 13:32:33 +00:00
Code Issues Projects Releases Wiki Activity

Support changing the subtarget features in ARM.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175315 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2013-02-15 22:41:25 +00:00
parent 789cb5df9c
commit 4788d14b48
2 changed files with 29 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
lib/Target/ARM/ARMSubtarget.cpp
View File

@ -14,7 +14,9 @@
#include "ARMSubtarget.h" #include "ARMSubtarget.h"
#include "ARMBaseInstrInfo.h" #include "ARMBaseInstrInfo.h"
#include "ARMBaseRegisterInfo.h" #include "ARMBaseRegisterInfo.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/GlobalValue.h" #include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/CommandLine.h" #include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetInstrInfo.h" #include "llvm/Target/TargetInstrInfo.h"
@ -85,17 +87,35 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU,
, CPUString(CPU) , CPUString(CPU)
, TargetTriple(TT) , TargetTriple(TT)
, TargetABI(ARM_ABI_APCS) { , TargetABI(ARM_ABI_APCS) {
// Determine default and user specified characteristics resetSubtargetFeatures(CPU, FS);
}
void ARMSubtarget::resetSubtargetFeatures(const MachineFunction *MF) {
AttributeSet FnAttrs = MF->getFunction()->getAttributes();
Attribute CPUAttr = FnAttrs.getAttribute(AttributeSet::FunctionIndex,
"target-cpu");
Attribute FSAttr = FnAttrs.getAttribute(AttributeSet::FunctionIndex,
"target-features");
std::string CPU =
!CPUAttr.hasAttribute(Attribute::None) ?CPUAttr.getValueAsString() : "";
std::string FS =
!FSAttr.hasAttribute(Attribute::None) ? FSAttr.getValueAsString() : "";
if (!FS.empty())
resetSubtargetFeatures(CPU, FS);
}
void ARMSubtarget::resetSubtargetFeatures(StringRef CPU, StringRef FS) {
if (CPUString.empty()) if (CPUString.empty())
CPUString = "generic"; CPUString = "generic";
// Insert the architecture feature derived from the target triple into the // Insert the architecture feature derived from the target triple into the
// feature string. This is important for setting features that are implied // feature string. This is important for setting features that are implied
// based on the architecture version. // based on the architecture version.
std::string ArchFS = ARM_MC::ParseARMTriple(TT, CPUString); std::string ArchFS = ARM_MC::ParseARMTriple(TargetTriple.getTriple(),
CPUString);
if (!FS.empty()) { if (!FS.empty()) {
if (!ArchFS.empty()) if (!ArchFS.empty())
ArchFS = ArchFS + "," + FS; ArchFS = ArchFS + "," + FS.str();
else else
ArchFS = FS; ArchFS = FS;
} }
@ -112,7 +132,8 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU,
// Initialize scheduling itinerary for the specified CPU. // Initialize scheduling itinerary for the specified CPU.
InstrItins = getInstrItineraryForCPU(CPUString); InstrItins = getInstrItineraryForCPU(CPUString);
if ((TT.find("eabi") != std::string::npos) || (isTargetIOS() && isMClass())) if ((TargetTriple.getTriple().find("eabi") != std::string::npos) ||
(isTargetIOS() && isMClass()))
// FIXME: We might want to separate AAPCS and EABI. Some systems, e.g. // FIXME: We might want to separate AAPCS and EABI. Some systems, e.g.
// Darwin-EABI conforms to AACPS but not the rest of EABI. // Darwin-EABI conforms to AACPS but not the rest of EABI.
TargetABI = ARM_ABI_AAPCS; TargetABI = ARM_ABI_AAPCS;

4
lib/Target/ARM/ARMSubtarget.h
View File

@ -202,6 +202,10 @@ protected:
/// subtarget options. Definition of function is auto generated by tblgen. /// subtarget options. Definition of function is auto generated by tblgen.
void ParseSubtargetFeatures(StringRef CPU, StringRef FS); void ParseSubtargetFeatures(StringRef CPU, StringRef FS);
/// \brief Reset the features for the X86 target.
virtual void resetSubtargetFeatures(const MachineFunction *MF);
void resetSubtargetFeatures(StringRef CPU, StringRef FS);
void computeIssueWidth(); void computeIssueWidth();
bool hasV4TOps() const { return HasV4TOps; } bool hasV4TOps() const { return HasV4TOps; }