-//=====-- X86Subtarget.h - Define TargetMachine for the X86 ---*- C++ -*--====//
+//=====---- X86Subtarget.h - Define Subtarget for the X86 -----*- C++ -*--====//
//
// 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.
//
//===----------------------------------------------------------------------===//
//
#define X86SUBTARGET_H
#include "llvm/Target/TargetSubtarget.h"
+#include <string>
namespace llvm {
class Module;
+class GlobalValue;
+class TargetMachine;
+
+/// PICStyles - The X86 backend supports a number of different styles of PIC.
+///
+namespace PICStyles {
+enum Style {
+ Stub, // Used on i386-darwin
+ GOT, // Used on many 32-bit unices.
+ RIPRel, // Used on X86-64 when not in -static mode.
+ None // Set when in -static mode (not PIC or DynamicNoPIC mode).
+};
+}
class X86Subtarget : public TargetSubtarget {
+public:
+ enum AsmWriterFlavorTy {
+ // Note: This numbering has to match the GCC assembler dialects for inline
+ // asm alternatives to work right.
+ ATT = 0, Intel = 1, Unset
+ };
protected:
+ enum X86SSEEnum {
+ NoMMXSSE, MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42
+ };
+
+ enum X863DNowEnum {
+ NoThreeDNow, ThreeDNow, ThreeDNowA
+ };
+
+ /// AsmFlavor - Which x86 asm dialect to use.
+ ///
+ AsmWriterFlavorTy AsmFlavor;
+
+ /// PICStyle - Which PIC style to use
+ ///
+ PICStyles::Style PICStyle;
+
+ /// X86SSELevel - MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or
+ /// none supported.
+ X86SSEEnum X86SSELevel;
+
+ /// X863DNowLevel - 3DNow or 3DNow Athlon, or none supported.
+ ///
+ X863DNowEnum X863DNowLevel;
+
+ /// HasX86_64 - True if the processor supports X86-64 instructions.
+ ///
+ bool HasX86_64;
+
+ /// HasSSE4A - True if the processor supports SSE4A instructions.
+ bool HasSSE4A;
+
+ /// HasAVX - Target has AVX instructions
+ bool HasAVX;
+
+ /// HasFMA3 - Target has 3-operand fused multiply-add
+ bool HasFMA3;
+
+ /// HasFMA4 - Target has 4-operand fused multiply-add
+ bool HasFMA4;
+
+ /// IsBTMemSlow - True if BT (bit test) of memory instructions are slow.
+ bool IsBTMemSlow;
+
+ /// DarwinVers - Nonzero if this is a darwin platform: the numeric
+ /// version of the platform, e.g. 8 = 10.4 (Tiger), 9 = 10.5 (Leopard), etc.
+ unsigned char DarwinVers; // Is any darwin-x86 platform.
+
+ /// isLinux - true if this is a "linux" platform.
+ bool IsLinux;
+
/// stackAlignment - The minimum alignment known to hold of the stack frame on
/// entry to the function and which must be maintained by every function.
unsigned stackAlignment;
- /// Used by instruction selector
- bool indirectExternAndWeakGlobals;
+ /// Max. memset / memcpy size that is turned into rep/movs, rep/stos ops.
+ ///
+ unsigned MaxInlineSizeThreshold;
+
+private:
+ /// Is64Bit - True if the processor supports 64-bit instructions and module
+ /// pointer size is 64 bit.
+ bool Is64Bit;
- /// Used by the asm printer
- bool asmDarwinLinkerStubs;
- bool asmLeadingUnderscore;
- bool asmAlignmentIsInBytes;
- bool asmPrintDotLocalConstants;
- bool asmPrintDotLCommConstants;
- bool asmPrintConstantAlignment;
public:
+ enum {
+ isELF, isCygwin, isDarwin, isWindows, isMingw
+ } TargetType;
+
/// This constructor initializes the data members to match that
/// of the specified module.
///
- X86Subtarget(const Module &M);
+ X86Subtarget(const Module &M, const std::string &FS, bool is64Bit);
/// getStackAlignment - Returns the minimum alignment known to hold of the
/// stack frame on entry to the function and which must be maintained by every
/// function for this subtarget.
unsigned getStackAlignment() const { return stackAlignment; }
- /// Returns true if the instruction selector should treat global values
- /// referencing external or weak symbols as indirect rather than direct
- /// references.
- bool getIndirectExternAndWeakGlobals() const {
- return indirectExternAndWeakGlobals;
+ /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
+ /// that still makes it profitable to inline the call.
+ unsigned getMaxInlineSizeThreshold() const { return MaxInlineSizeThreshold; }
+
+ /// ParseSubtargetFeatures - Parses features string setting specified
+ /// subtarget options. Definition of function is auto generated by tblgen.
+ std::string ParseSubtargetFeatures(const std::string &FS,
+ const std::string &CPU);
+
+ /// AutoDetectSubtargetFeatures - Auto-detect CPU features using CPUID
+ /// instruction.
+ void AutoDetectSubtargetFeatures();
+
+ bool is64Bit() const { return Is64Bit; }
+
+ PICStyles::Style getPICStyle() const { return PICStyle; }
+ void setPICStyle(PICStyles::Style Style) { PICStyle = Style; }
+
+ bool hasMMX() const { return X86SSELevel >= MMX; }
+ bool hasSSE1() const { return X86SSELevel >= SSE1; }
+ bool hasSSE2() const { return X86SSELevel >= SSE2; }
+ bool hasSSE3() const { return X86SSELevel >= SSE3; }
+ bool hasSSSE3() const { return X86SSELevel >= SSSE3; }
+ bool hasSSE41() const { return X86SSELevel >= SSE41; }
+ bool hasSSE42() const { return X86SSELevel >= SSE42; }
+ bool hasSSE4A() const { return HasSSE4A; }
+ bool has3DNow() const { return X863DNowLevel >= ThreeDNow; }
+ bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; }
+ bool hasAVX() const { return HasAVX; }
+ bool hasFMA3() const { return HasFMA3; }
+ bool hasFMA4() const { return HasFMA4; }
+
+ bool isBTMemSlow() const { return IsBTMemSlow; }
+
+ unsigned getAsmFlavor() const {
+ return AsmFlavor != Unset ? unsigned(AsmFlavor) : 0;
+ }
+
+ bool isFlavorAtt() const { return AsmFlavor == ATT; }
+ bool isFlavorIntel() const { return AsmFlavor == Intel; }
+
+ bool isTargetDarwin() const { return TargetType == isDarwin; }
+ bool isTargetELF() const {
+ return TargetType == isELF;
+ }
+ bool isTargetWindows() const { return TargetType == isWindows; }
+ bool isTargetMingw() const { return TargetType == isMingw; }
+ bool isTargetCygMing() const { return (TargetType == isMingw ||
+ TargetType == isCygwin); }
+ bool isTargetCygwin() const { return TargetType == isCygwin; }
+ bool isTargetWin64() const {
+ return (Is64Bit && (TargetType == isMingw || TargetType == isWindows));
}
+
+ std::string getDataLayout() const {
+ const char *p;
+ if (is64Bit())
+ p = "e-p:64:64-s:64-f64:64:64-i64:64:64-f80:128:128";
+ else {
+ if (isTargetDarwin())
+ p = "e-p:32:32-f64:32:64-i64:32:64-f80:128:128";
+ else
+ p = "e-p:32:32-f64:32:64-i64:32:64-f80:32:32";
+ }
+ return std::string(p);
+ }
+
+ bool isPICStyleSet() const { return PICStyle != PICStyles::None; }
+ bool isPICStyleGOT() const { return PICStyle == PICStyles::GOT; }
+ bool isPICStyleStub() const { return PICStyle == PICStyles::Stub; }
+ bool isPICStyleRIPRel() const { return PICStyle == PICStyles::RIPRel; }
+
+ /// getDarwinVers - Return the darwin version number, 8 = tiger, 9 = leopard.
+ unsigned getDarwinVers() const { return DarwinVers; }
+
+ /// isLinux - Return true if the target is "Linux".
+ bool isLinux() const { return IsLinux; }
+
+ /// True if accessing the GV requires an extra load. For Windows, dllimported
+ /// symbols are indirect, loading the value at address GV rather then the
+ /// value of GV itself. This means that the GlobalAddress must be in the base
+ /// or index register of the address, not the GV offset field.
+ bool GVRequiresExtraLoad(const GlobalValue* GV, const TargetMachine& TM,
+ bool isDirectCall) const;
+
+ /// True if accessing the GV requires a register. This is a superset of the
+ /// cases where GVRequiresExtraLoad is true. Some variations of PIC require
+ /// a register, but not an extra load.
+ bool GVRequiresRegister(const GlobalValue* GV, const TargetMachine& TM,
+ bool isDirectCall) const;
+
+ /// IsLegalToCallImmediateAddr - Return true if the subtarget allows calls
+ /// to immediate address.
+ bool IsLegalToCallImmediateAddr(const TargetMachine &TM) const;
+
+ /// 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 *getBZeroEntry() const;
+
+ /// getSpecialAddressLatency - For targets where it is beneficial to
+ /// backschedule instructions that compute addresses, return a value
+ /// indicating the number of scheduling cycles of backscheduling that
+ /// should be attempted.
+ unsigned getSpecialAddressLatency() const;
};
+
+namespace X86 {
+ /// 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 GetCpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
+ unsigned *rECX, unsigned *rEDX);
+}
+
} // End llvm namespace
#endif
projects / oota-llvm.git / blobdiff