//
// 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 "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-cl::opt<X86Subtarget::AsmWriterFlavorTy>
+static cl::opt<X86Subtarget::AsmWriterFlavorTy>
AsmWriterFlavor("x86-asm-syntax", cl::init(X86Subtarget::Unset),
cl::desc("Choose style of code to emit from X86 backend:"),
cl::values(
bool isDirectCall) const
{
// FIXME: PIC
- if (TM.getRelocationModel() != Reloc::Static)
+ if (TM.getRelocationModel() != Reloc::Static) {
if (isTargetDarwin()) {
return (!isDirectCall &&
(GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
- (GV->isDeclaration() && !GV->hasNotBeenReadFromBytecode())));
- } else if (TM.getRelocationModel() == Reloc::PIC_ && isPICStyleGOT()) {
- // Extra load is needed for all non-statics.
- return (!isDirectCall &&
- (GV->isDeclaration() || !GV->hasInternalLinkage()));
+ GV->hasCommonLinkage() ||
+ (GV->isDeclaration() && !GV->hasNotBeenReadFromBitcode())));
+ } else if (isTargetELF()) {
+ // Extra load is needed for all externally visible.
+ if (isDirectCall)
+ return false;
+ if (GV->hasInternalLinkage() || GV->hasHiddenVisibility())
+ return false;
+ return true;
} else if (isTargetCygMing() || isTargetWindows()) {
return (GV->hasDLLImportLinkage());
}
+ }
return false;
}
+/// This function returns the name of a function which has an interface
+/// like the non-standard bzero function, if such a function exists on
+/// the current subtarget and it is considered prefereable over
+/// memset with zero 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)
+ return "__bzero";
+
+ return 0;
+}
+
/// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
/// specified arguments. If we can't run cpuid on the host, return true.
bool X86::GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
if ((EDX >> 26) & 0x1) X86SSELevel = SSE2;
if (ECX & 0x1) X86SSELevel = SSE3;
if ((ECX >> 9) & 0x1) X86SSELevel = SSSE3;
+ if ((ECX >> 19) & 0x1) X86SSELevel = SSE41;
+ if ((ECX >> 20) & 0x1) X86SSELevel = SSE42;
- X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
- HasX86_64 = (EDX >> 29) & 0x1;
+ if (memcmp(text.c, "GenuineIntel", 12) == 0 ||
+ memcmp(text.c, "AuthenticAMD", 12) == 0) {
+ X86::GetCpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
+ HasX86_64 = (EDX >> 29) & 0x1;
+ }
}
static const char *GetCurrentX86CPU() {
: AsmFlavor(AsmWriterFlavor)
, PICStyle(PICStyle::None)
, X86SSELevel(NoMMXSSE)
+ , X863DNowLevel(NoThreeDNow)
, HasX86_64(false)
+ , DarwinVers(0)
+ , IsLinux(false)
, stackAlignment(8)
// FIXME: this is a known good value for Yonah. How about others?
- , MinRepStrSizeThreshold(128)
+ , MaxInlineSizeThreshold(128)
, Is64Bit(is64Bit)
, TargetType(isELF) { // Default to ELF unless otherwise specified.
-
+
// Determine default and user specified characteristics
if (!FS.empty()) {
// If feature string is not empty, parse features string.
std::string CPU = GetCurrentX86CPU();
ParseSubtargetFeatures(FS, CPU);
-
- if (Is64Bit && !HasX86_64)
- cerr << "Warning: Generation of 64-bit code for a 32-bit processor "
- << "requested.\n";
- if (Is64Bit && X86SSELevel < SSE2)
- cerr << "Warning: 64-bit processors all have at least SSE2.\n";
} else {
// Otherwise, use CPUID to auto-detect feature set.
AutoDetectSubtargetFeatures();
// if one cannot be determined, to true.
const std::string& TT = M.getTargetTriple();
if (TT.length() > 5) {
- if (TT.find("cygwin") != std::string::npos)
+ 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;
+ IsLinux = true;
+ } else if (TT.find("cygwin") != std::string::npos) {
TargetType = isCygwin;
- else if (TT.find("mingw") != std::string::npos)
+ } else if (TT.find("mingw") != std::string::npos) {
TargetType = isMingw;
- else if (TT.find("darwin") != std::string::npos)
- TargetType = isDarwin;
- else if (TT.find("win32") != std::string::npos)
+ } else if (TT.find("win32") != std::string::npos) {
TargetType = isWindows;
+ } else if (TT.find("windows") != std::string::npos) {
+ TargetType = isWindows;
+ }
} else if (TT.empty()) {
#if defined(__CYGWIN__)
TargetType = isCygwin;
-#elif defined(__MINGW32__)
+#elif defined(__MINGW32__) || defined(__MINGW64__)
TargetType = isMingw;
#elif defined(__APPLE__)
TargetType = isDarwin;
-#elif defined(_WIN32)
+#if __APPLE_CC__ > 5400
+ DarwinVers = 9; // GCC 5400+ is Leopard.
+#else
+ DarwinVers = 8; // Minimum supported darwin is Tiger.
+#endif
+
+#elif defined(_WIN32) || defined(_WIN64)
TargetType = isWindows;
+#elif defined(__linux__)
+ // Linux doesn't imply ELF, but we don't currently support anything else.
+ TargetType = isELF;
+ IsLinux = true;
#endif
}
// If the asm syntax hasn't been overridden on the command line, use whatever
// the target wants.
if (AsmFlavor == X86Subtarget::Unset) {
- if (TargetType == isWindows) {
- AsmFlavor = X86Subtarget::Intel;
- } else {
- AsmFlavor = X86Subtarget::ATT;
- }
+ AsmFlavor = (TargetType == isWindows)
+ ? X86Subtarget::Intel : X86Subtarget::ATT;
}
- if (TargetType == isDarwin ||
- TargetType == isCygwin ||
- TargetType == isMingw ||
- (TargetType == isELF && Is64Bit))
+ // Stack alignment is 16 bytes on Darwin (both 32 and 64 bit) and for all 64
+ // bit targets.
+ if (TargetType == isDarwin || Is64Bit)
stackAlignment = 16;
+
+ if (StackAlignment)
+ stackAlignment = StackAlignment;
}
projects / oota-llvm.git / blobdiff