-//===- PowerPCSubtarget.cpp - PPC Subtarget Information ---------*- C++ -*-===//
+//===- PowerPCSubtarget.cpp - PPC Subtarget Information -------------------===//
//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Nate Begeman and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
-#include "PowerPCSubtarget.h"
-#include "llvm/Module.h"
+#include "PPCSubtarget.h"
+#include "PPC.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/Target/TargetMachine.h"
+#include "PPCGenSubtarget.inc"
+#include <cstdlib>
+using namespace llvm;
#if defined(__APPLE__)
#include <mach/mach.h>
#include <mach/host_info.h>
#include <mach/machine.h>
-static boolean_t IsGP() {
+/// GetCurrentPowerPCFeatures - Returns the current CPUs features.
+static const char *GetCurrentPowerPCCPU() {
host_basic_info_data_t hostInfo;
mach_msg_type_number_t infoCount;
infoCount = HOST_BASIC_INFO_COUNT;
host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
&infoCount);
+
+ if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
+
+ switch(hostInfo.cpu_subtype) {
+ case CPU_SUBTYPE_POWERPC_601: return "601";
+ case CPU_SUBTYPE_POWERPC_602: return "602";
+ case CPU_SUBTYPE_POWERPC_603: return "603";
+ case CPU_SUBTYPE_POWERPC_603e: return "603e";
+ case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
+ case CPU_SUBTYPE_POWERPC_604: return "604";
+ case CPU_SUBTYPE_POWERPC_604e: return "604e";
+ case CPU_SUBTYPE_POWERPC_620: return "620";
+ case CPU_SUBTYPE_POWERPC_750: return "750";
+ case CPU_SUBTYPE_POWERPC_7400: return "7400";
+ case CPU_SUBTYPE_POWERPC_7450: return "7450";
+ case CPU_SUBTYPE_POWERPC_970: return "970";
+ default: ;
+ }
- return ((hostInfo.cpu_type == CPU_TYPE_POWERPC) &&
- (hostInfo.cpu_subtype == CPU_SUBTYPE_POWERPC_970));
-}
+ return "generic";
+}
#endif
-using namespace llvm;
-PPCSubtarget::PPCSubtarget(const Module &M)
- : TargetSubtarget(), stackAlignment(16), isGigaProcessor(false), isAIX(false),
- isDarwin(false) {
- // Set the boolean corresponding to the current target triple, or the default
- // if one cannot be determined, to true.
- const std::string& TT = M.getTargetTriple();
- if (TT.length() > 5) {
- isDarwin = TT.find("darwin") != std::string::npos;
+PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &FS,
+ bool is64Bit)
+ : StackAlignment(16)
+ , DarwinDirective(PPC::DIR_NONE)
+ , IsGigaProcessor(false)
+ , Has64BitSupport(false)
+ , Use64BitRegs(false)
+ , IsPPC64(is64Bit)
+ , HasAltivec(false)
+ , HasFSQRT(false)
+ , HasSTFIWX(false)
+ , HasLazyResolverStubs(false)
+ , IsJITCodeModel(false)
+ , DarwinVers(0) {
+
+ // Determine default and user specified characteristics
+ std::string CPU = "generic";
#if defined(__APPLE__)
- isGigaProcessor = IsGP();
-#endif
- } else if (TT.empty()) {
-#if defined(_POWER)
- isAIX = true;
-#elif defined(__APPLE__)
- isDarwin = true;
- isGigaProcessor = IsGP();
+ CPU = GetCurrentPowerPCCPU();
#endif
+
+ // Parse features string.
+ ParseSubtargetFeatures(FS, CPU);
+
+ // If we are generating code for ppc64, verify that options make sense.
+ if (is64Bit) {
+ Has64BitSupport = true;
+ // Silently force 64-bit register use on ppc64.
+ Use64BitRegs = true;
}
+
+ // If the user requested use of 64-bit regs, but the cpu selected doesn't
+ // support it, ignore.
+ if (use64BitRegs() && !has64BitSupport())
+ Use64BitRegs = false;
+
+ // Set the boolean corresponding to the current target triple, or the default
+ // if one cannot be determined, to true.
+ if (TT.length() > 7) {
+ // Determine which version of darwin this is.
+ size_t DarwinPos = TT.find("-darwin");
+ if (DarwinPos != std::string::npos) {
+ if (isdigit(TT[DarwinPos+7]))
+ DarwinVers = atoi(&TT[DarwinPos+7]);
+ else
+ DarwinVers = 8; // Minimum supported darwin is Tiger.
+ }
+ }
+
+ // Set up darwin-specific properties.
+ if (isDarwin())
+ HasLazyResolverStubs = true;
+}
+
+/// 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;
+}
+
+
+/// hasLazyResolverStub - Return true if accesses to the specified global have
+/// to go through a dyld lazy resolution stub. This means that an extra load
+/// is required to get the address of the global.
+bool PPCSubtarget::hasLazyResolverStub(const GlobalValue *GV,
+ const TargetMachine &TM) const {
+ // We never hae 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();
+ if (GV->hasHiddenVisibility() && !isDecl && !GV->hasCommonLinkage())
+ return false;
+ return GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
+ GV->hasCommonLinkage() || isDecl;
}
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