X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86Subtarget.h;h=0e4cfde7788d430ffe27d6d1f6d2a7e90af2f986;hb=4c3715c2e5e17d7216a96ac2baf9720630f04408;hp=adbc7cba2f0e4de39c2c91a0f5704dff6746d83f;hpb=b1e1180ca0b32f37aa74d7ad703eeaf91e66c8fa;p=oota-llvm.git diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h index adbc7cba2f0..0e4cfde7788 100644 --- a/lib/Target/X86/X86Subtarget.h +++ b/lib/Target/X86/X86Subtarget.h @@ -2,8 +2,8 @@ // // 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. // //===----------------------------------------------------------------------===// // @@ -15,46 +15,216 @@ #define X86SUBTARGET_H #include "llvm/Target/TargetSubtarget.h" - #include namespace llvm { -class Module; +class GlobalValue; +class TargetMachine; + +/// PICStyles - The X86 backend supports a number of different styles of PIC. +/// +namespace PICStyles { +enum Style { + StubPIC, // Used on i386-darwin in -fPIC mode. + StubDynamicNoPIC, // Used on i386-darwin in -mdynamic-no-pic mode. + GOT, // Used on many 32-bit unices in -fPIC mode. + 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 { protected: + enum X86SSEEnum { + NoMMXSSE, MMX, SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42 + }; + + enum X863DNowEnum { + NoThreeDNow, ThreeDNow, ThreeDNowA + }; + + /// 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; + + /// HasCMov - True if this processor has conditional move instructions + /// (generally pentium pro+). + bool HasCMov; + + /// 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. + /// 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 + /// 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. + /// of the specified triple. /// - X86Subtarget(const Module &M, const std::string &FS); + X86Subtarget(const std::string &TT, 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; } + + 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 isTargetCygwin() const { return TargetType == isCygwin; } + bool isTargetCygMing() const { + return TargetType == isMingw || TargetType == isCygwin; + } + + /// isTargetCOFF - Return true if this is any COFF/Windows target variant. + bool isTargetCOFF() const { + return TargetType == isMingw || TargetType == isCygwin || + TargetType == isWindows; + } + + 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 isPICStyleRIPRel() const { return PICStyle == PICStyles::RIPRel; } + + bool isPICStyleStubPIC() const { + return PICStyle == PICStyles::StubPIC; + } + + bool isPICStyleStubNoDynamic() const { + return PICStyle == PICStyles::StubDynamicNoPIC; + } + bool isPICStyleStubAny() const { + return PICStyle == PICStyles::StubDynamicNoPIC || + PICStyle == PICStyles::StubPIC; } + + /// getDarwinVers - Return the darwin version number, 8 = Tiger, 9 = Leopard, + /// 10 = Snow Leopard, etc. + unsigned getDarwinVers() const { return DarwinVers; } + + /// ClassifyGlobalReference - Classify a global variable reference for the + /// current subtarget according to how we should reference it in a non-pcrel + /// context. + unsigned char ClassifyGlobalReference(const GlobalValue *GV, + const TargetMachine &TM)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; + + /// enablePostRAScheduler - X86 target is enabling post-alloc scheduling + /// at 'More' optimization level. + bool enablePostRAScheduler(CodeGenOpt::Level OptLevel, + TargetSubtarget::AntiDepBreakMode& mode) const { + mode = TargetSubtarget::ANTIDEP_NONE; + return OptLevel >= CodeGenOpt::Default; } }; + } // End llvm namespace #endif