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Sink feature IsThumb into MC layer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134608 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2011-07-07 08:26:46 +00:00
parent 347c50a293
commit db068738e8
4 changed files with 34 additions and 15 deletions
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22
lib/Target/ARM/ARM.td
View File

@ -16,6 +16,12 @@
include "llvm/Target/Target.td"
//===----------------------------------------------------------------------===//
// ARM Subtarget state.
//
def ModeThumb : SubtargetFeature<"thumb", "IsThumb", "true",
"Thumb mode">;
//===----------------------------------------------------------------------===//
// ARM Subtarget features.
@ -85,23 +91,23 @@ def FeatureDSPThumb2 : SubtargetFeature<"t2dsp", "Thumb2DSP", "true",
def FeatureMP : SubtargetFeature<"mp", "HasMPExtension", "true",
"Supports Multiprocessing extension">;
// ARM architectures.
// ARM ISAs.
def HasV4TOps : SubtargetFeature<"v4t", "HasV4TOps", "true",
"ARM v4T">;
"Support ARM v4T instructions">;
def HasV5TOps : SubtargetFeature<"v5t", "HasV5TOps", "true",
"ARM v5T",
"Support ARM v5T instructions",
[HasV4TOps]>;
def HasV5TEOps : SubtargetFeature<"v5te", "HasV5TEOps", "true",
"ARM v5TE, v5TEj, v5TExp",
"Support ARM v5TE, v5TEj, and v5TExp instructions",
[HasV5TOps]>;
def HasV6Ops : SubtargetFeature<"v6", "HasV6Ops", "true",
"ARM v6",
"Support ARM v6 instructions",
[HasV5TEOps]>;
def HasV6T2Ops : SubtargetFeature<"v6t2", "HasV6T2Ops", "true",
"ARM v6t2",
"Support ARM v6t2 instructions",
[HasV6Ops, FeatureThumb2, FeatureDSPThumb2]>;
def HasV7Ops : SubtargetFeature<"v7", "HasV7Ops", "true",
"ARM v7",
"Support ARM v7 instructions",
[HasV6T2Ops]>;
//===----------------------------------------------------------------------===//
@ -111,8 +117,6 @@ def HasV7Ops : SubtargetFeature<"v7", "HasV7Ops", "true",
include "ARMSchedule.td"
// ARM processor families.
def ProcOthers : SubtargetFeature<"others", "ARMProcFamily", "Others",
"One of the other ARM processor families">;
def ProcA8 : SubtargetFeature<"a8", "ARMProcFamily", "CortexA8",
"Cortex-A8 ARM processors",
[FeatureSlowFPBrcc, FeatureNEONForFP,

3
lib/Target/ARM/ARMSubtarget.cpp
View File

@ -81,14 +81,13 @@ ARMSubtarget::ARMSubtarget(const std::string &TT, const std::string &CPU,
// Insert the architecture feature derived from the target triple into the
// feature string. This is important for setting features that are implied
// based on the architecture version.
std::string ArchFS = ARM_MC::ParseARMTriple(TT, IsThumb);
std::string ArchFS = ARM_MC::ParseARMTriple(TT);
if (!FS.empty()) {
if (!ArchFS.empty())
ArchFS = ArchFS + "," + FS;
else
ArchFS = FS;
}
ParseSubtargetFeatures(CPUString, ArchFS);
// Thumb2 implies at least V6T2. FIXME: Fix tests to explicitly specify a

22
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.cpp
View File

@ -42,8 +42,16 @@ MCRegisterInfo *createARMMCRegisterInfo() {
MCSubtargetInfo *createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
StringRef FS) {
std::string ArchFS = ARM_MC::ParseARMTriple(TT);
if (!FS.empty()) {
if (!ArchFS.empty())
ArchFS = ArchFS + "," + FS.str();
else
ArchFS = FS;
}
MCSubtargetInfo *X = new MCSubtargetInfo();
InitARMMCSubtargetInfo(X, CPU, FS);
InitARMMCSubtargetInfo(X, CPU, ArchFS);
return X;
}
@ -74,16 +82,17 @@ extern "C" void LLVMInitializeARMMCSubtargetInfo() {
createARMMCSubtargetInfo);
}
std::string ARM_MC::ParseARMTriple(StringRef TT, bool &IsThumb) {
std::string ARM_MC::ParseARMTriple(StringRef TT) {
// Set the boolean corresponding to the current target triple, or the default
// if one cannot be determined, to true.
unsigned Len = TT.size();
unsigned Idx = 0;
bool isThumb = false;
if (Len >= 5 && TT.substr(0, 4) == "armv")
Idx = 4;
else if (Len >= 6 && TT.substr(0, 5) == "thumb") {
IsThumb = true;
isThumb = true;
if (Len >= 7 && TT[5] == 'v')
Idx = 6;
}
@ -116,5 +125,12 @@ std::string ARM_MC::ParseARMTriple(StringRef TT, bool &IsThumb) {
ARMArchFeature = "+v4t";
}
if (isThumb) {
if (ARMArchFeature.empty())
ARMArchFeature = "+thumb";
else
ARMArchFeature += ",+thumb";
}
return ARMArchFeature;
}

2
lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.h
View File

@ -23,7 +23,7 @@ class StringRef;
extern Target TheARMTarget, TheThumbTarget;
namespace ARM_MC {
std::string ParseARMTriple(StringRef TT, bool &IsThumb);
std::string ParseARMTriple(StringRef TT);
}
} // End llvm namespace