#include <sstream>
#include <cstring>
#include <string>
+#include "PIC16PAN.h"
namespace llvm {
class PIC16TargetMachine;
UGE
};
}
- // A Central class to manage all ABI naming conventions.
- // PAN - [P]ic16 [A]BI [N]ames
- class PAN {
- public:
- // Map the name of the symbol to its section name.
- // Current ABI:
- // -----------------------------------------------------
- // ALL Names are prefixed with the symobl '@'.
- // ------------------------------------------------------
- // Global variables do not have any '.' in their names.
- // These are maily function names and global variable names.
- // Example - @foo, @i
- // -------------------------------------------------------
- // Functions and auto variables.
- // Names are mangled as <prefix><funcname>.<tag>.<varname>
- // Where <prefix> is '@' and <tag> is any one of
- // the following
- // .auto. - an automatic var of a function.
- // .temp. - temproray data of a function.
- // .ret. - return value label for a function.
- // .frame. - Frame label for a function where retval, args
- // and temps are stored.
- // .args. - Label used to pass arguments to a direct call.
- // Example - Function name: @foo
- // Its frame: @foo.frame.
- // Its retval: @foo.ret.
- // Its local vars: @foo.auto.a
- // Its temp data: @foo.temp.
- // Its arg passing: @foo.args.
- //----------------------------------------------
- // Libcall - compiler generated libcall names must start with .lib.
- // This id will be used to emit extern decls for libcalls.
- // Example - libcall name: @.lib.sra.i8
- // To pass args: @.lib.sra.i8.args.
- // To return val: @.lib.sra.i8.ret.
- //----------------------------------------------
- // SECTION Names
- // uninitialized globals - @udata.<num>.#
- // initialized globals - @idata.<num>.#
- // Function frame - @<func>.frame_section.
- // Function autos - @<func>.autos_section.
- // Declarations - Enclosed in comments. No section for them.
- //----------------------------------------------------------
-
- // Tags used to mangle different names.
- enum TAGS {
- PREFIX_SYMBOL,
- GLOBAL,
- STATIC_LOCAL,
- AUTOS_LABEL,
- FRAME_LABEL,
- RET_LABEL,
- ARGS_LABEL,
- TEMPS_LABEL,
-
- LIBCALL,
-
- FRAME_SECTION,
- AUTOS_SECTION,
- CODE_SECTION
- };
-
- // Textual names of the tags.
- inline static const char *getTagName(TAGS tag) {
- switch (tag) {
- default: return "";
- case PREFIX_SYMBOL: return "@";
- case AUTOS_LABEL: return ".auto.";
- case FRAME_LABEL: return ".frame.";
- case TEMPS_LABEL: return ".temp.";
- case ARGS_LABEL: return ".args.";
- case RET_LABEL: return ".ret.";
- case LIBCALL: return ".lib.";
- case FRAME_SECTION: return ".frame_section.";
- case AUTOS_SECTION: return ".autos_section.";
- case CODE_SECTION: return ".code_section.";
- }
- }
-
- // Get tag type for the Symbol.
- inline static TAGS getSymbolTag(const std::string &Sym) {
- if (Sym.find(getTagName(TEMPS_LABEL)) != std::string::npos)
- return TEMPS_LABEL;
-
- if (Sym.find(getTagName(FRAME_LABEL)) != std::string::npos)
- return FRAME_LABEL;
-
- if (Sym.find(getTagName(RET_LABEL)) != std::string::npos)
- return RET_LABEL;
-
- if (Sym.find(getTagName(ARGS_LABEL)) != std::string::npos)
- return ARGS_LABEL;
-
- if (Sym.find(getTagName(AUTOS_LABEL)) != std::string::npos)
- return AUTOS_LABEL;
-
- if (Sym.find(getTagName(LIBCALL)) != std::string::npos)
- return LIBCALL;
-
- // It does not have any Tag. So its a true global or static local.
- if (Sym.find(".") == std::string::npos)
- return GLOBAL;
-
- // If a . is there, then it may be static local.
- // We should mangle these as well in clang.
- if (Sym.find(".") != std::string::npos)
- return STATIC_LOCAL;
-
- assert (0 && "Could not determine Symbol's tag");
- return PREFIX_SYMBOL; // Silence warning when assertions are turned off.
- }
-
- // addPrefix - add prefix symbol to a name if there isn't one already.
- inline static std::string addPrefix (const std::string &Name) {
- std::string prefix = getTagName (PREFIX_SYMBOL);
-
- // If this name already has a prefix, nothing to do.
- if (Name.compare(0, prefix.size(), prefix) == 0)
- return Name;
-
- return prefix + Name;
- }
-
- // Get mangled func name from a mangled sym name.
- // In all cases func name is the first component before a '.'.
- static inline std::string getFuncNameForSym(const std::string &Sym1) {
- assert (getSymbolTag(Sym1) != GLOBAL && "not belongs to a function");
-
- std::string Sym = addPrefix(Sym1);
-
- // Position of the . after func name. That's where func name ends.
- size_t func_name_end = Sym.find ('.');
-
- return Sym.substr (0, func_name_end);
- }
-
- // Get Frame start label for a func.
- static std::string getFrameLabel(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(FRAME_LABEL);
- return Func1 + tag;
- }
-
- static std::string getRetvalLabel(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(RET_LABEL);
- return Func1 + tag;
- }
-
- static std::string getArgsLabel(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(ARGS_LABEL);
- return Func1 + tag;
- }
-
- static std::string getTempdataLabel(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(TEMPS_LABEL);
- return Func1 + tag;
- }
-
- static std::string getFrameSectionName(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(FRAME_SECTION);
- return Func1 + tag + "# UDATA_OVR";
- }
-
- static std::string getAutosSectionName(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(AUTOS_SECTION);
- return Func1 + tag + "# UDATA_OVR";
- }
-
- static std::string getCodeSectionName(const std::string &Func) {
- std::string Func1 = addPrefix(Func);
- std::string tag = getTagName(CODE_SECTION);
- return Func1 + tag + "# CODE";
- }
-
- // udata, romdata and idata section names are generated by a given number.
- // @udata.<num>.#
- static std::string getUdataSectionName(unsigned num,
- std::string prefix = "") {
- std::ostringstream o;
- o << getTagName(PREFIX_SYMBOL) << prefix << "udata." << num
- << ".# UDATA";
- return o.str();
- }
-
- static std::string getRomdataSectionName(unsigned num,
- std::string prefix = "") {
- std::ostringstream o;
- o << getTagName(PREFIX_SYMBOL) << prefix << "romdata." << num
- << ".# ROMDATA";
- return o.str();
- }
-
- static std::string getIdataSectionName(unsigned num,
- std::string prefix = "") {
- std::ostringstream o;
- o << getTagName(PREFIX_SYMBOL) << prefix << "idata." << num
- << ".# IDATA";
- return o.str();
- }
-
- inline static bool isLocalName (const std::string &Name) {
- if (getSymbolTag(Name) == AUTOS_LABEL)
- return true;
-
- return false;
- }
-
- // FIXME: currently we track both @memcpy and memcpy, as
- // the first one is generated by clang, and the second one by codegen
- // while lowering intrinsics. One we fix codegen to use RTLIB, we can
- // have only @memcpy here.
- inline static bool isMemIntrinsic (const std::string &Name) {
- if (Name.compare("@memcpy") == 0 || Name.compare("memcpy") == 0 ||
- Name.compare("@memset") == 0 || Name.compare("memset") == 0 ||
- Name.compare("@memmove") == 0 || Name.compare("memmove") == 0) {
- return true;
- }
-
- return false;
- }
-
- inline static bool isLocalToFunc (std::string &Func, std::string &Var) {
- if (! isLocalName(Var)) return false;
-
- std::string Func1 = addPrefix(Func);
- // Extract func name of the varilable.
- const std::string &fname = getFuncNameForSym(Var);
-
- if (fname.compare(Func1) == 0)
- return true;
-
- return false;
- }
-
-
- // Get the section for the given external symbol names.
- // This tries to find the type (Tag) of the symbol from its mangled name
- // and return appropriate section name for it.
- static inline std::string getSectionNameForSym(const std::string &Sym1) {
- std::string Sym = addPrefix(Sym1);
-
- std::string SectionName;
-
- std::string Fname = getFuncNameForSym (Sym);
- TAGS id = getSymbolTag (Sym);
-
- switch (id) {
- default : assert (0 && "Could not determine external symbol type");
- case FRAME_LABEL:
- case RET_LABEL:
- case TEMPS_LABEL:
- case ARGS_LABEL: {
- return getFrameSectionName(Fname);
- }
- case AUTOS_LABEL: {
- return getAutosSectionName(Fname);
- }
- }
- }
- }; // class PAN.
-
// External symbol names require memory to live till the program end.
// So we have to allocate it and keep.
projects / oota-llvm.git / blobdiff