-//===-- X86Subtarget.cpp - X86 Subtarget Information ------------*- C++ -*-===//
+//===-- X86Subtarget.cpp - X86 Subtarget Information ----------------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file implements the X86 specific subclass of TargetSubtarget.
+// This file implements the X86 specific subclass of TargetSubtargetInfo.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "subtarget"
#include "X86Subtarget.h"
#include "X86InstrInfo.h"
-#include "X86GenSubtarget.inc"
#include "llvm/GlobalValue.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Host.h"
+#include "llvm/Support/Host.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
#include "llvm/ADT/SmallVector.h"
+
+#define GET_SUBTARGETINFO_CTOR
+#define GET_SUBTARGETINFO_MC_DESC
+#define GET_SUBTARGETINFO_TARGET_DESC
+#include "X86GenSubtarget.inc"
+
using namespace llvm;
#if defined(_MSC_VER)
if (GV->hasDLLImportLinkage())
return X86II::MO_DLLIMPORT;
- // Materializable GVs (in JIT lazy compilation mode) do not require an
- // extra load from stub.
- bool isDecl = GV->isDeclaration() && !GV->isMaterializable();
+ // Determine whether this is a reference to a definition or a declaration.
+ // Materializable GVs (in JIT lazy compilation mode) do not require an extra
+ // load from stub.
+ bool isDecl = GV->hasAvailableExternallyLinkage();
+ if (GV->isDeclaration() && !GV->isMaterializable())
+ isDecl = true;
// X86-64 in PIC mode.
if (isPICStyleRIPRel()) {
if (GV->hasDefaultVisibility() &&
(isDecl || GV->isWeakForLinker()))
return X86II::MO_GOTPCREL;
- } else {
+ } else if (!isTargetWin64()) {
assert(isTargetELF() && "Unknown rip-relative target");
// Extra load is needed for all externally visible.
/// passed as the second argument. Otherwise it returns null.
const char *X86Subtarget::getBZeroEntry() const {
// Darwin 10 has a __bzero entry point for this purpose.
- if (getDarwinVers() >= 10)
+ if (getTargetTriple().isMacOSX() &&
+ !getTargetTriple().isMacOSXVersionLT(10, 6))
return "__bzero";
return 0;
if ((ECX >> 9) & 1) X86SSELevel = SSSE3;
if ((ECX >> 19) & 1) X86SSELevel = SSE41;
if ((ECX >> 20) & 1) X86SSELevel = SSE42;
+ // FIXME: AVX codegen support is not ready.
+ //if ((ECX >> 28) & 1) { HasAVX = true; X86SSELevel = NoMMXSSE; }
bool IsIntel = memcmp(text.c, "GenuineIntel", 12) == 0;
bool IsAMD = !IsIntel && memcmp(text.c, "AuthenticAMD", 12) == 0;
- HasFMA3 = IsIntel && ((ECX >> 12) & 0x1);
- HasAVX = ((ECX >> 28) & 0x1);
+ HasCLMUL = IsIntel && ((ECX >> 1) & 0x1);
+ HasFMA3 = IsIntel && ((ECX >> 12) & 0x1);
+ HasPOPCNT = IsIntel && ((ECX >> 23) & 0x1);
+ HasAES = IsIntel && ((ECX >> 25) & 0x1);
if (IsIntel || IsAMD) {
// Determine if bit test memory instructions are slow.
unsigned Model = 0;
DetectFamilyModel(EAX, Family, Model);
IsBTMemSlow = IsAMD || (Family == 6 && Model >= 13);
+ // If it's Nehalem, unaligned memory access is fast.
+ if (Family == 15 && Model == 26)
+ IsUAMemFast = true;
GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
HasX86_64 = (EDX >> 29) & 0x1;
}
}
-X86Subtarget::X86Subtarget(const std::string &TT, const std::string &FS,
- bool is64Bit)
- : PICStyle(PICStyles::None)
+X86Subtarget::X86Subtarget(const std::string &TT, const std::string &CPU,
+ const std::string &FS,
+ bool is64Bit, unsigned StackAlignOverride)
+ : X86GenSubtargetInfo()
+ , PICStyle(PICStyles::None)
, X86SSELevel(NoMMXSSE)
, X863DNowLevel(NoThreeDNow)
, HasCMov(false)
, HasX86_64(false)
+ , HasPOPCNT(false)
, HasSSE4A(false)
, HasAVX(false)
+ , HasAES(false)
+ , HasCLMUL(false)
, HasFMA3(false)
, HasFMA4(false)
, IsBTMemSlow(false)
+ , IsUAMemFast(false)
, HasVectorUAMem(false)
- , DarwinVers(0)
, stackAlignment(8)
// FIXME: this is a known good value for Yonah. How about others?
, MaxInlineSizeThreshold(128)
- , Is64Bit(is64Bit)
- , TargetType(isELF) { // Default to ELF unless otherwise specified.
+ , TargetTriple(TT)
+ , Is64Bit(is64Bit) {
- // default to hard float ABI
- if (FloatABIType == FloatABI::Default)
- FloatABIType = FloatABI::Hard;
-
// Determine default and user specified characteristics
- if (!FS.empty()) {
+ if (!CPU.empty() || !FS.empty()) {
// If feature string is not empty, parse features string.
- std::string CPU = sys::getHostCPUName();
- ParseSubtargetFeatures(FS, CPU);
+ std::string CPUName = CPU;
+ if (CPUName.empty())
+ CPUName = sys::getHostCPUName();
+ ParseSubtargetFeatures(FS, CPUName);
// All X86-64 CPUs also have SSE2, however user might request no SSE via
// -mattr, so don't force SSELevel here.
+ if (HasAVX)
+ X86SSELevel = NoMMXSSE;
} else {
// Otherwise, use CPUID to auto-detect feature set.
AutoDetectSubtargetFeatures();
// Make sure SSE2 is enabled; it is available on all X86-64 CPUs.
- if (Is64Bit && X86SSELevel < SSE2)
+ if (Is64Bit && !HasAVX && X86SSELevel < SSE2)
X86SSELevel = SSE2;
}
// If requesting codegen for X86-64, make sure that 64-bit features
// are enabled.
- if (Is64Bit)
+ if (Is64Bit) {
HasX86_64 = true;
+ // All 64-bit cpus have cmov support.
+ HasCMov = true;
+ }
+
DEBUG(dbgs() << "Subtarget features: SSELevel " << X86SSELevel
<< ", 3DNowLevel " << X863DNowLevel
<< ", 64bit " << HasX86_64 << "\n");
assert((!Is64Bit || HasX86_64) &&
"64-bit code requested on a subtarget that doesn't support it!");
- // Set the boolean corresponding to the current target triple, or the default
- // if one cannot be determined, to true.
- if (TT.length() > 5) {
- size_t Pos;
- if ((Pos = TT.find("-darwin")) != std::string::npos) {
- TargetType = isDarwin;
-
- // Compute the darwin version number.
- if (isdigit(TT[Pos+7]))
- DarwinVers = atoi(&TT[Pos+7]);
- else
- DarwinVers = 8; // Minimum supported darwin is Tiger.
- } else if (TT.find("linux") != std::string::npos) {
- // Linux doesn't imply ELF, but we don't currently support anything else.
- TargetType = isELF;
- } else if (TT.find("cygwin") != std::string::npos) {
- TargetType = isCygwin;
- } else if (TT.find("mingw") != std::string::npos) {
- TargetType = isMingw;
- } else if (TT.find("win32") != std::string::npos) {
- TargetType = isWindows;
- } else if (TT.find("windows") != std::string::npos) {
- TargetType = isWindows;
- } else if (TT.find("-cl") != std::string::npos) {
- TargetType = isDarwin;
- DarwinVers = 9;
- }
- }
-
- // Stack alignment is 16 bytes on Darwin (both 32 and 64 bit) and for all 64
- // bit targets.
- if (TargetType == isDarwin || Is64Bit)
+ // Stack alignment is 16 bytes on Darwin, FreeBSD, Linux and Solaris (both
+ // 32 and 64 bit) and for all 64-bit targets.
+ if (StackAlignOverride)
+ stackAlignment = StackAlignOverride;
+ else if (isTargetDarwin() || isTargetFreeBSD() || isTargetLinux() ||
+ isTargetSolaris() || Is64Bit)
stackAlignment = 16;
-
- if (StackAlignment)
- stackAlignment = StackAlignment;
-}
-
-bool X86Subtarget::enablePostRAScheduler(
- CodeGenOpt::Level OptLevel,
- TargetSubtarget::AntiDepBreakMode& Mode,
- RegClassVector& CriticalPathRCs) const {
- Mode = TargetSubtarget::ANTIDEP_CRITICAL;
- CriticalPathRCs.clear();
- return OptLevel >= CodeGenOpt::Aggressive;
}
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