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First in a sequence of ARM/MC/*ELF* specific work. 

Lifted the EmitRawText calls to ARMAsmPrinter::emitAttribute()
Added ARMAsmPrinter::emitAttributes() (plural s).
TODO:
.cpu attribute needs to be refactored

llvm-svn: 115859
This commit is contained in:
Jason W Kim 2010-10-06 22:36:46 +00:00
parent 883936ce0b
commit bff84d418f
2 changed files with 60 additions and 39 deletions
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97
llvm/lib/Target/ARM/ARMAsmPrinter.cpp
View File

@ -107,6 +107,12 @@ namespace {
void EmitStartOfAsmFile(Module &M);
void EmitEndOfAsmFile(Module &M);
private:
// Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
void emitAttributes();
void emitAttribute(ARMBuildAttrs::AttrType attr, int v);
public:
void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
MachineLocation getDebugValueLocation(const MachineInstr *MI) const {
@ -407,45 +413,8 @@ void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) {
// Emit ARM Build Attributes
if (Subtarget->isTargetELF()) {
// CPU Type
std::string CPUString = Subtarget->getCPUString();
if (CPUString != "generic")
OutStreamer.EmitRawText("\t.cpu " + Twine(CPUString));
// FIXME: Emit FPU type
if (Subtarget->hasVFP2())
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::VFP_arch) + ", 2");
// Signal various FP modes.
if (!UnsafeFPMath) {
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_FP_denormal) + ", 1");
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_FP_exceptions) + ", 1");
}
if (NoInfsFPMath && NoNaNsFPMath)
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_FP_number_model)+ ", 1");
else
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_FP_number_model)+ ", 3");
// 8-bytes alignment stuff.
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_align8_needed) + ", 1");
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_align8_preserved) + ", 1");
// Hard float. Use both S and D registers and conform to AAPCS-VFP.
if (Subtarget->isAAPCS_ABI() && FloatABIType == FloatABI::Hard) {
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_HardFP_use) + ", 3");
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(ARMBuildAttrs::ABI_VFP_args) + ", 1");
}
// FIXME: Should we signal R9 usage?
emitAttributes();
}
}
@ -518,6 +487,58 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) {
}
}
//===----------------------------------------------------------------------===//
// Helper routines for EmitStartOfAsmFile() and EmitEndOfAsmFile()
// FIXME:
// The following seem like one-off assembler flags, but they actually need
// to appear in the .ARM.attributes section in ELF.
// Instead of subclassing the MCELFStreamer, we do the work here.
void ARMAsmPrinter::emitAttributes() {
// FIXME: Add in ELF specific section handling here.
// FIXME: unify this: .cpu and CPUString with enum attributes
std::string CPUString = Subtarget->getCPUString();
if (CPUString != "generic")
OutStreamer.EmitRawText("\t.cpu " + Twine(CPUString));
// FIXME: Emit FPU type
if (Subtarget->hasVFP2())
emitAttribute(ARMBuildAttrs::VFP_arch, 2);
// Signal various FP modes.
if (!UnsafeFPMath) {
emitAttribute(ARMBuildAttrs::ABI_FP_denormal, 1);
emitAttribute(ARMBuildAttrs::ABI_FP_exceptions, 1);
}
if (NoInfsFPMath && NoNaNsFPMath)
emitAttribute(ARMBuildAttrs::ABI_FP_number_model, 1);
else
emitAttribute(ARMBuildAttrs::ABI_FP_number_model, 3);
// 8-bytes alignment stuff.
emitAttribute(ARMBuildAttrs::ABI_align8_needed, 1);
emitAttribute(ARMBuildAttrs::ABI_align8_preserved, 1);
// Hard float. Use both S and D registers and conform to AAPCS-VFP.
if (Subtarget->isAAPCS_ABI() && FloatABIType == FloatABI::Hard) {
emitAttribute(ARMBuildAttrs::ABI_HardFP_use, 3);
emitAttribute(ARMBuildAttrs::ABI_VFP_args, 1);
}
// FIXME: Should we signal R9 usage?
}
void ARMAsmPrinter::emitAttribute(ARMBuildAttrs::AttrType attr, int v) {
if (OutStreamer.hasRawTextSupport()) {
OutStreamer.EmitRawText("\t.eabi_attribute " +
Twine(attr) + ", " + Twine(v));
} else {
assert(0 && "ELF .ARM.attributes unimplemented");
}
}
//===----------------------------------------------------------------------===//
static MCSymbol *getPICLabel(const char *Prefix, unsigned FunctionNumber,

2
llvm/lib/Target/ARM/ARMBuildAttrs.h
View File

@ -16,7 +16,7 @@
#define __TARGET_ARMBUILDATTRS_H__
namespace ARMBuildAttrs {
enum {
enum AttrType {
File = 1,
Section = 2,
Symbol = 3,