#include "PPCSubtarget.h"
#include "PPC.h"
#include "PPCRegisterInfo.h"
+#include "PPCTargetMachine.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineScheduler.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalValue.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Target/TargetMachine.h"
#define GET_SUBTARGETINFO_CTOR
#include "PPCGenSubtargetInfo.inc"
-/// Return the datalayout string of a subtarget.
-static std::string getDataLayoutString(const PPCSubtarget &ST) {
- const Triple &T = ST.getTargetTriple();
-
- std::string Ret;
-
- // Most PPC* platforms are big endian, PPC64LE is little endian.
- if (ST.isLittleEndian())
- Ret = "e";
- else
- Ret = "E";
-
- Ret += DataLayout::getManglingComponent(T);
-
- // PPC32 has 32 bit pointers. The PS3 (OS Lv2) is a PPC64 machine with 32 bit
- // pointers.
- if (!ST.isPPC64() || T.getOS() == Triple::Lv2)
- Ret += "-p:32:32";
-
- // Note, the alignment values for f64 and i64 on ppc64 in Darwin
- // documentation are wrong; these are correct (i.e. "what gcc does").
- if (ST.isPPC64() || ST.isSVR4ABI())
- Ret += "-i64:64";
- else
- Ret += "-f64:32:64";
-
- // PPC64 has 32 and 64 bit registers, PPC32 has only 32 bit ones.
- if (ST.isPPC64())
- Ret += "-n32:64";
- else
- Ret += "-n32";
-
- return Ret;
-}
+static cl::opt<bool> UseSubRegLiveness("ppc-track-subreg-liveness",
+cl::desc("Enable subregister liveness tracking for PPC"), cl::Hidden);
PPCSubtarget &PPCSubtarget::initializeSubtargetDependencies(StringRef CPU,
StringRef FS) {
initializeEnvironment();
- resetSubtargetFeatures(CPU, FS);
+ initSubtargetFeatures(CPU, FS);
return *this;
}
PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &CPU,
- const std::string &FS, bool is64Bit,
- CodeGenOpt::Level OptLevel)
- : PPCGenSubtargetInfo(TT, CPU, FS), IsPPC64(is64Bit), TargetTriple(TT),
- OptLevel(OptLevel),
- FrameLowering(initializeSubtargetDependencies(CPU, FS)),
- DL(getDataLayoutString(*this)), InstrInfo(*this) {}
-
-/// SetJITMode - This is called to inform the subtarget info that we are
-/// producing code for the JIT.
-void PPCSubtarget::SetJITMode() {
- // JIT mode doesn't want lazy resolver stubs, it knows exactly where
- // everything is. This matters for PPC64, which codegens in PIC mode without
- // stubs.
- HasLazyResolverStubs = false;
-
- // Calls to external functions need to use indirect calls
- IsJITCodeModel = true;
-}
-
-void PPCSubtarget::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()) {
- initializeEnvironment();
- resetSubtargetFeatures(CPU, FS);
- }
-}
+ const std::string &FS, const PPCTargetMachine &TM)
+ : PPCGenSubtargetInfo(TT, CPU, FS), TargetTriple(TT),
+ IsPPC64(TargetTriple.getArch() == Triple::ppc64 ||
+ TargetTriple.getArch() == Triple::ppc64le),
+ TargetABI(PPC_ABI_UNKNOWN),
+ FrameLowering(initializeSubtargetDependencies(CPU, FS)), InstrInfo(*this),
+ TLInfo(TM, *this), TSInfo(TM.getDataLayout()) {}
void PPCSubtarget::initializeEnvironment() {
StackAlignment = 16;
Use64BitRegs = false;
UseCRBits = false;
HasAltivec = false;
+ HasSPE = false;
HasQPX = false;
HasVSX = false;
+ HasP8Vector = false;
+ HasP8Altivec = false;
HasFCPSGN = false;
HasFSQRT = false;
HasFRE = false;
HasFPCVT = false;
HasISEL = false;
HasPOPCNTD = false;
+ HasCMPB = false;
HasLDBRX = false;
IsBookE = false;
+ HasOnlyMSYNC = false;
+ IsPPC4xx = false;
+ IsPPC6xx = false;
+ IsE500 = false;
DeprecatedMFTB = false;
DeprecatedDST = false;
HasLazyResolverStubs = false;
- IsJITCodeModel = false;
+ HasICBT = false;
+ HasInvariantFunctionDescriptors = false;
}
-void PPCSubtarget::resetSubtargetFeatures(StringRef CPU, StringRef FS) {
+void PPCSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
// Determine default and user specified characteristics
std::string CPUName = CPU;
- if (CPUName.empty())
- CPUName = "generic";
+ if (CPUName.empty()) {
+ // If cross-compiling with -march=ppc64le without -mcpu
+ if (TargetTriple.getArch() == Triple::ppc64le)
+ CPUName = "ppc64le";
+ else
+ CPUName = "generic";
+ }
#if (defined(__APPLE__) || defined(__linux__)) && \
(defined(__ppc__) || defined(__powerpc__))
if (CPUName == "generic")
// Initialize scheduling itinerary for the specified CPU.
InstrItins = getInstrItineraryForCPU(CPUName);
- // Make sure 64-bit features are available when CPUname is generic
- std::string FullFS = FS;
-
- // If we are generating code for ppc64, verify that options make sense.
- if (IsPPC64) {
- Has64BitSupport = true;
- // Silently force 64-bit register use on ppc64.
- Use64BitRegs = true;
- if (!FullFS.empty())
- FullFS = "+64bit," + FullFS;
- else
- FullFS = "+64bit";
- }
-
- // At -O2 and above, track CR bits as individual registers.
- if (OptLevel >= CodeGenOpt::Default) {
- if (!FullFS.empty())
- FullFS = "+crbits," + FullFS;
- else
- FullFS = "+crbits";
- }
-
// Parse features string.
- ParseSubtargetFeatures(CPUName, FullFS);
+ ParseSubtargetFeatures(CPUName, FS);
// If the user requested use of 64-bit regs, but the cpu selected doesn't
// support it, ignore.
- if (use64BitRegs() && !has64BitSupport())
- Use64BitRegs = false;
+ if (IsPPC64 && has64BitSupport())
+ Use64BitRegs = true;
// Set up darwin-specific properties.
if (isDarwin())
// Determine endianness.
IsLittleEndian = (TargetTriple.getArch() == Triple::ppc64le);
- // FIXME: For now, we disable VSX in little-endian mode until endian
- // issues in those instructions can be addressed.
- if (IsLittleEndian)
- HasVSX = false;
+ // Determine default ABI.
+ if (TargetABI == PPC_ABI_UNKNOWN) {
+ if (!isDarwin() && IsPPC64) {
+ if (IsLittleEndian)
+ TargetABI = PPC_ABI_ELFv2;
+ else
+ TargetABI = PPC_ABI_ELFv1;
+ }
+ }
}
/// hasLazyResolverStub - Return true if accesses to the specified global have
// We never have stubs if HasLazyResolverStubs=false or if in static mode.
if (!HasLazyResolverStubs || TM.getRelocationModel() == Reloc::Static)
return false;
- // If symbol visibility is hidden, the extra load is not needed if
- // the symbol is definitely defined in the current translation unit.
- bool isDecl = GV->isDeclaration() && !GV->isMaterializable();
+ bool isDecl = GV->isDeclaration();
if (GV->hasHiddenVisibility() && !isDecl && !GV->hasCommonLinkage())
return false;
return GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
GV->hasCommonLinkage() || isDecl;
}
-bool PPCSubtarget::enablePostRAScheduler(
- CodeGenOpt::Level OptLevel,
- TargetSubtargetInfo::AntiDepBreakMode& Mode,
- RegClassVector& CriticalPathRCs) const {
- Mode = TargetSubtargetInfo::ANTIDEP_ALL;
-
- CriticalPathRCs.clear();
-
- if (isPPC64())
- CriticalPathRCs.push_back(&PPC::G8RCRegClass);
- else
- CriticalPathRCs.push_back(&PPC::GPRCRegClass);
-
- return OptLevel >= CodeGenOpt::Default;
-}
-
// Embedded cores need aggressive scheduling (and some others also benefit).
static bool needsAggressiveScheduling(unsigned Directive) {
switch (Directive) {
case PPC::DIR_E500mc:
case PPC::DIR_E5500:
case PPC::DIR_PWR7:
+ case PPC::DIR_PWR8:
return true;
}
}
return needsAggressiveScheduling(DarwinDirective);
}
+// This overrides the PostRAScheduler bit in the SchedModel for each CPU.
+bool PPCSubtarget::enablePostMachineScheduler() const { return true; }
+
+PPCGenSubtargetInfo::AntiDepBreakMode PPCSubtarget::getAntiDepBreakMode() const {
+ return TargetSubtargetInfo::ANTIDEP_ALL;
+}
+
+void PPCSubtarget::getCriticalPathRCs(RegClassVector &CriticalPathRCs) const {
+ CriticalPathRCs.clear();
+ CriticalPathRCs.push_back(isPPC64() ?
+ &PPC::G8RCRegClass : &PPC::GPRCRegClass);
+}
+
void PPCSubtarget::overrideSchedPolicy(MachineSchedPolicy &Policy,
MachineInstr *begin,
MachineInstr *end,
return needsAggressiveScheduling(DarwinDirective);
}
+bool PPCSubtarget::enableSubRegLiveness() const {
+ return UseSubRegLiveness;
+}
+
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