//
// 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 "PPCSubtarget.h"
#include "PPC.h"
-#include "llvm/Module.h"
+#include "llvm/GlobalValue.h"
#include "llvm/Target/TargetMachine.h"
#include "PPCGenSubtarget.inc"
+#include <cstdlib>
using namespace llvm;
#if defined(__APPLE__)
#endif
-PPCSubtarget::PPCSubtarget(const TargetMachine &tm, const Module &M,
- const std::string &FS, bool is64Bit)
- : TM(tm)
- , StackAlignment(16)
+PPCSubtarget::PPCSubtarget(const std::string &TT, const std::string &FS,
+ bool is64Bit)
+ : StackAlignment(16)
+ , DarwinDirective(PPC::DIR_NONE)
, IsGigaProcessor(false)
, Has64BitSupport(false)
, Use64BitRegs(false)
, HasAltivec(false)
, HasFSQRT(false)
, HasSTFIWX(false)
- , IsDarwin(false)
- , HasLazyResolverStubs(false) {
+ , HasLazyResolverStubs(false)
+ , DarwinVers(0) {
// Determine default and user specified characteristics
std::string CPU = "generic";
// If we are generating code for ppc64, verify that options make sense.
if (is64Bit) {
- if (!has64BitSupport()) {
- cerr << "PPC: Generation of 64-bit code for a 32-bit processor "
- << "requested. Ignoring 32-bit processor feature.\n";
- Has64BitSupport = true;
- }
+ 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, warn and ignore.
- if (use64BitRegs() && !has64BitSupport()) {
- cerr << "PPC: 64-bit registers requested on CPU without support. "
- << "Disabling 64-bit register use.\n";
+ // 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.
- const std::string& TT = M.getTargetTriple();
- if (TT.length() > 5) {
- IsDarwin = TT.find("-darwin") != std::string::npos;
- } else if (TT.empty()) {
-#if defined(__APPLE__)
- IsDarwin = true;
-#endif
+ 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) {
+ if (isDarwin())
HasLazyResolverStubs = true;
- }
}
/// SetJITMode - This is called to inform the subtarget info that we are
/// 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 {
+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->isExternal() && !GV->hasNotBeenReadFromBytecode());
+ GV->hasCommonLinkage() || isDecl;
}