Update prebuilt Clang to r416183b from Android.
https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef
clang 12.0.5 (based on r416183b) from build 7284624.
Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/llvm/CodeGen/AsmPrinter.h b/linux-x64/clang/include/llvm/CodeGen/AsmPrinter.h
index 9c2097b..76486b0 100644
--- a/linux-x64/clang/include/llvm/CodeGen/AsmPrinter.h
+++ b/linux-x64/clang/include/llvm/CodeGen/AsmPrinter.h
@@ -17,8 +17,6 @@
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Twine.h"
#include "llvm/CodeGen/AsmPrinterHandler.h"
#include "llvm/CodeGen/DwarfStringPoolEntry.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
@@ -58,7 +56,6 @@
class MachineOptimizationRemarkEmitter;
class MCAsmInfo;
class MCCFIInstruction;
-struct MCCodePaddingContext;
class MCContext;
class MCExpr;
class MCInst;
@@ -69,10 +66,17 @@
class MCTargetOptions;
class MDNode;
class Module;
+class PseudoProbeHandler;
class raw_ostream;
class StackMaps;
+class StringRef;
class TargetLoweringObjectFile;
class TargetMachine;
+class Twine;
+
+namespace remarks {
+class RemarkStreamer;
+}
/// This class is intended to be used as a driving class for all asm writers.
class AsmPrinter : public MachineFunctionPass {
@@ -98,7 +102,7 @@
/// This is a pointer to the current MachineModuleInfo.
MachineModuleInfo *MMI = nullptr;
- /// This is a pointer to the current MachineLoopInfo.
+ /// This is a pointer to the current MachineDominatorTree.
MachineDominatorTree *MDT = nullptr;
/// This is a pointer to the current MachineLoopInfo.
@@ -107,36 +111,37 @@
/// Optimization remark emitter.
MachineOptimizationRemarkEmitter *ORE;
+ /// The symbol for the entry in __patchable_function_entires.
+ MCSymbol *CurrentPatchableFunctionEntrySym = nullptr;
+
/// The symbol for the current function. This is recalculated at the beginning
/// of each call to runOnMachineFunction().
MCSymbol *CurrentFnSym = nullptr;
+ /// The symbol for the current function descriptor on AIX. This is created
+ /// at the beginning of each call to SetupMachineFunction().
+ MCSymbol *CurrentFnDescSym = nullptr;
+
/// The symbol used to represent the start of the current function for the
/// purpose of calculating its size (e.g. using the .size directive). By
/// default, this is equal to CurrentFnSym.
MCSymbol *CurrentFnSymForSize = nullptr;
+ /// Map a basic block section ID to the begin and end symbols of that section
+ /// which determine the section's range.
+ struct MBBSectionRange {
+ MCSymbol *BeginLabel, *EndLabel;
+ };
+
+ MapVector<unsigned, MBBSectionRange> MBBSectionRanges;
+
/// Map global GOT equivalent MCSymbols to GlobalVariables and keep track of
/// its number of uses by other globals.
using GOTEquivUsePair = std::pair<const GlobalVariable *, unsigned>;
MapVector<const MCSymbol *, GOTEquivUsePair> GlobalGOTEquivs;
-private:
- MCSymbol *CurrentFnBegin = nullptr;
- MCSymbol *CurrentFnEnd = nullptr;
- MCSymbol *CurExceptionSym = nullptr;
-
- // The garbage collection metadata printer table.
- void *GCMetadataPrinters = nullptr; // Really a DenseMap.
-
- /// Emit comments in assembly output if this is true.
- bool VerboseAsm;
-
- static char ID;
-
-protected:
- /// Protected struct HandlerInfo and Handlers permit target extended
- /// AsmPrinter adds their own handlers.
+ /// struct HandlerInfo and Handlers permit users or target extended
+ /// AsmPrinter to add their own handlers.
struct HandlerInfo {
std::unique_ptr<AsmPrinterHandler> Handler;
const char *TimerName;
@@ -152,9 +157,33 @@
TimerGroupDescription(TimerGroupDescription) {}
};
+private:
+ MCSymbol *CurrentFnEnd = nullptr;
+
+ /// Map a basic block section ID to the exception symbol associated with that
+ /// section. Map entries are assigned and looked up via
+ /// AsmPrinter::getMBBExceptionSym.
+ DenseMap<unsigned, MCSymbol *> MBBSectionExceptionSyms;
+
+ // The symbol used to represent the start of the current BB section of the
+ // function. This is used to calculate the size of the BB section.
+ MCSymbol *CurrentSectionBeginSym = nullptr;
+
+ // The garbage collection metadata printer table.
+ void *GCMetadataPrinters = nullptr; // Really a DenseMap.
+
+ /// Emit comments in assembly output if this is true.
+ bool VerboseAsm;
+
+ static char ID;
+
+protected:
+ MCSymbol *CurrentFnBegin = nullptr;
+
/// A vector of all debug/EH info emitters we should use. This vector
/// maintains ownership of the emitters.
- SmallVector<HandlerInfo, 1> Handlers;
+ std::vector<HandlerInfo> Handlers;
+ size_t NumUserHandlers = 0;
public:
struct SrcMgrDiagInfo {
@@ -178,6 +207,10 @@
/// If the target supports dwarf debug info, this pointer is non-null.
DwarfDebug *DD = nullptr;
+ /// A handler that supports pseudo probe emission with embedded inline
+ /// context.
+ PseudoProbeHandler *PP = nullptr;
+
/// If the current module uses dwarf CFI annotations strictly for debugging.
bool isCFIMoveForDebugging = false;
@@ -193,6 +226,14 @@
uint16_t getDwarfVersion() const;
void setDwarfVersion(uint16_t Version);
+ bool isDwarf64() const;
+
+ /// Returns 4 for DWARF32 and 8 for DWARF64.
+ unsigned int getDwarfOffsetByteSize() const;
+
+ /// Returns 4 for DWARF32 and 12 for DWARF64.
+ unsigned int getUnitLengthFieldByteSize() const;
+
bool isPositionIndependent() const;
/// Return true if assembly output should contain comments.
@@ -207,7 +248,10 @@
MCSymbol *getFunctionBegin() const { return CurrentFnBegin; }
MCSymbol *getFunctionEnd() const { return CurrentFnEnd; }
- MCSymbol *getCurExceptionSym();
+
+ // Return the exception symbol associated with the MBB section containing a
+ // given basic block.
+ MCSymbol *getMBBExceptionSym(const MachineBasicBlock &MBB);
/// Return information about object file lowering.
const TargetLoweringObjectFile &getObjFileLowering() const;
@@ -234,6 +278,11 @@
MCSymbol *getSymbol(const GlobalValue *GV) const;
+ /// Similar to getSymbol() but preferred for references. On ELF, this uses a
+ /// local symbol if a reference to GV is guaranteed to be resolved to the
+ /// definition in the same module.
+ MCSymbol *getSymbolPreferLocal(const GlobalValue &GV) const;
+
//===------------------------------------------------------------------===//
// XRay instrumentation implementation.
//===------------------------------------------------------------------===//
@@ -260,15 +309,12 @@
const class Function *Fn;
uint8_t Version;
- void emit(int, MCStreamer *, const MCSymbol *) const;
+ void emit(int, MCStreamer *) const;
};
// All the sleds to be emitted.
SmallVector<XRayFunctionEntry, 4> Sleds;
- // A unique ID used for ELF sections associated with a particular function.
- unsigned XRayFnUniqueID = 0;
-
// Helper function to record a given XRay sled.
void recordSled(MCSymbol *Sled, const MachineInstr &MI, SledKind Kind,
uint8_t Version = 0);
@@ -276,6 +322,8 @@
/// Emit a table with all XRay instrumentation points.
void emitXRayTable();
+ void emitPatchableFunctionEntries();
+
//===------------------------------------------------------------------===//
// MachineFunctionPass Implementation.
//===------------------------------------------------------------------===//
@@ -294,7 +342,7 @@
/// Emit the specified function out to the OutStreamer.
bool runOnMachineFunction(MachineFunction &MF) override {
SetupMachineFunction(MF);
- EmitFunctionBody();
+ emitFunctionBody();
return false;
}
@@ -304,10 +352,10 @@
/// This should be called when a new MachineFunction is being processed from
/// runOnMachineFunction.
- void SetupMachineFunction(MachineFunction &MF);
+ virtual void SetupMachineFunction(MachineFunction &MF);
/// This method emits the body and trailer for a function.
- void EmitFunctionBody();
+ void emitFunctionBody();
void emitCFIInstruction(const MachineInstr &MI);
@@ -315,7 +363,11 @@
void emitStackSizeSection(const MachineFunction &MF);
- void emitRemarksSection(Module &M);
+ void emitBBAddrMapSection(const MachineFunction &MF);
+
+ void emitPseudoProbe(const MachineInstr &MI);
+
+ void emitRemarksSection(remarks::RemarkStreamer &RS);
enum CFIMoveType { CFI_M_None, CFI_M_EH, CFI_M_Debug };
CFIMoveType needsCFIMoves() const;
@@ -329,31 +381,56 @@
/// Print to the current output stream assembly representations of the
/// constants in the constant pool MCP. This is used to print out constants
/// which have been "spilled to memory" by the code generator.
- virtual void EmitConstantPool();
+ virtual void emitConstantPool();
/// Print assembly representations of the jump tables used by the current
/// function to the current output stream.
- virtual void EmitJumpTableInfo();
+ virtual void emitJumpTableInfo();
/// Emit the specified global variable to the .s file.
- virtual void EmitGlobalVariable(const GlobalVariable *GV);
+ virtual void emitGlobalVariable(const GlobalVariable *GV);
/// Check to see if the specified global is a special global used by LLVM. If
/// so, emit it and return true, otherwise do nothing and return false.
- bool EmitSpecialLLVMGlobal(const GlobalVariable *GV);
+ bool emitSpecialLLVMGlobal(const GlobalVariable *GV);
- /// Emit an alignment directive to the specified power of two boundary. For
- /// example, if you pass in 3 here, you will get an 8 byte alignment. If a
+ /// `llvm.global_ctors` and `llvm.global_dtors` are arrays of Structor
+ /// structs.
+ ///
+ /// Priority - init priority
+ /// Func - global initialization or global clean-up function
+ /// ComdatKey - associated data
+ struct Structor {
+ int Priority = 0;
+ Constant *Func = nullptr;
+ GlobalValue *ComdatKey = nullptr;
+
+ Structor() = default;
+ };
+
+ /// This method gathers an array of Structors and then sorts them out by
+ /// Priority.
+ /// @param List The initializer of `llvm.global_ctors` or `llvm.global_dtors`
+ /// array.
+ /// @param[out] Structors Sorted Structor structs by Priority.
+ void preprocessXXStructorList(const DataLayout &DL, const Constant *List,
+ SmallVector<Structor, 8> &Structors);
+
+ /// This method emits `llvm.global_ctors` or `llvm.global_dtors` list.
+ virtual void emitXXStructorList(const DataLayout &DL, const Constant *List,
+ bool IsCtor);
+
+ /// Emit an alignment directive to the specified power of two boundary. If a
/// global value is specified, and if that global has an explicit alignment
/// requested, it will override the alignment request if required for
/// correctness.
- void EmitAlignment(unsigned NumBits, const GlobalObject *GV = nullptr) const;
+ void emitAlignment(Align Alignment, const GlobalObject *GV = nullptr) const;
/// Lower the specified LLVM Constant to an MCExpr.
virtual const MCExpr *lowerConstant(const Constant *CV);
/// Print a general LLVM constant to the .s file.
- void EmitGlobalConstant(const DataLayout &DL, const Constant *CV);
+ void emitGlobalConstant(const DataLayout &DL, const Constant *CV);
/// Unnamed constant global variables solely contaning a pointer to
/// another globals variable act like a global variable "proxy", or GOT
@@ -377,50 +454,59 @@
// Overridable Hooks
//===------------------------------------------------------------------===//
+ void addAsmPrinterHandler(HandlerInfo Handler) {
+ Handlers.insert(Handlers.begin(), std::move(Handler));
+ NumUserHandlers++;
+ }
+
// Targets can, or in the case of EmitInstruction, must implement these to
// customize output.
/// This virtual method can be overridden by targets that want to emit
/// something at the start of their file.
- virtual void EmitStartOfAsmFile(Module &) {}
+ virtual void emitStartOfAsmFile(Module &) {}
/// This virtual method can be overridden by targets that want to emit
/// something at the end of their file.
- virtual void EmitEndOfAsmFile(Module &) {}
+ virtual void emitEndOfAsmFile(Module &) {}
/// Targets can override this to emit stuff before the first basic block in
/// the function.
- virtual void EmitFunctionBodyStart() {}
+ virtual void emitFunctionBodyStart() {}
/// Targets can override this to emit stuff after the last basic block in the
/// function.
- virtual void EmitFunctionBodyEnd() {}
+ virtual void emitFunctionBodyEnd() {}
/// Targets can override this to emit stuff at the start of a basic block.
/// By default, this method prints the label for the specified
/// MachineBasicBlock, an alignment (if present) and a comment describing it
/// if appropriate.
- virtual void EmitBasicBlockStart(const MachineBasicBlock &MBB) const;
+ virtual void emitBasicBlockStart(const MachineBasicBlock &MBB);
/// Targets can override this to emit stuff at the end of a basic block.
- virtual void EmitBasicBlockEnd(const MachineBasicBlock &MBB);
+ virtual void emitBasicBlockEnd(const MachineBasicBlock &MBB);
/// Targets should implement this to emit instructions.
- virtual void EmitInstruction(const MachineInstr *) {
+ virtual void emitInstruction(const MachineInstr *) {
llvm_unreachable("EmitInstruction not implemented");
}
/// Return the symbol for the specified constant pool entry.
virtual MCSymbol *GetCPISymbol(unsigned CPID) const;
- virtual void EmitFunctionEntryLabel();
+ virtual void emitFunctionEntryLabel();
- virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
+ virtual void emitFunctionDescriptor() {
+ llvm_unreachable("Function descriptor is target-specific.");
+ }
+
+ virtual void emitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
/// Targets can override this to change how global constants that are part of
/// a C++ static/global constructor list are emitted.
- virtual void EmitXXStructor(const DataLayout &DL, const Constant *CV) {
- EmitGlobalConstant(DL, CV);
+ virtual void emitXXStructor(const DataLayout &DL, const Constant *CV) {
+ emitGlobalConstant(DL, CV);
}
/// Return true if the basic block has exactly one predecessor and the control
@@ -433,6 +519,9 @@
/// instructions in verbose mode.
virtual void emitImplicitDef(const MachineInstr *MI) const;
+ /// Emit N NOP instructions.
+ void emitNops(unsigned N);
+
//===------------------------------------------------------------------===//
// Symbol Lowering Routines.
//===------------------------------------------------------------------===//
@@ -481,49 +570,47 @@
/// Emit something like ".long Hi-Lo" where the size in bytes of the directive
/// is specified by Size and Hi/Lo specify the labels. This implicitly uses
/// .set if it is available.
- void EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
+ void emitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
unsigned Size) const;
/// Emit something like ".uleb128 Hi-Lo".
- void EmitLabelDifferenceAsULEB128(const MCSymbol *Hi,
+ void emitLabelDifferenceAsULEB128(const MCSymbol *Hi,
const MCSymbol *Lo) const;
/// Emit something like ".long Label+Offset" where the size in bytes of the
/// directive is specified by Size and Label specifies the label. This
/// implicitly uses .set if it is available.
- void EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
+ void emitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
unsigned Size, bool IsSectionRelative = false) const;
/// Emit something like ".long Label" where the size in bytes of the directive
/// is specified by Size and Label specifies the label.
- void EmitLabelReference(const MCSymbol *Label, unsigned Size,
+ void emitLabelReference(const MCSymbol *Label, unsigned Size,
bool IsSectionRelative = false) const {
- EmitLabelPlusOffset(Label, 0, Size, IsSectionRelative);
+ emitLabelPlusOffset(Label, 0, Size, IsSectionRelative);
}
- /// Emit something like ".long Label + Offset".
- void EmitDwarfOffset(const MCSymbol *Label, uint64_t Offset) const;
-
//===------------------------------------------------------------------===//
// Dwarf Emission Helper Routines
//===------------------------------------------------------------------===//
/// Emit the specified signed leb128 value.
- void EmitSLEB128(int64_t Value, const char *Desc = nullptr) const;
+ void emitSLEB128(int64_t Value, const char *Desc = nullptr) const;
/// Emit the specified unsigned leb128 value.
- void EmitULEB128(uint64_t Value, const char *Desc = nullptr, unsigned PadTo = 0) const;
+ void emitULEB128(uint64_t Value, const char *Desc = nullptr,
+ unsigned PadTo = 0) const;
/// Emit a .byte 42 directive that corresponds to an encoding. If verbose
/// assembly output is enabled, we output comments describing the encoding.
/// Desc is a string saying what the encoding is specifying (e.g. "LSDA").
- void EmitEncodingByte(unsigned Val, const char *Desc = nullptr) const;
+ void emitEncodingByte(unsigned Val, const char *Desc = nullptr) const;
/// Return the size of the encoding in bytes.
unsigned GetSizeOfEncodedValue(unsigned Encoding) const;
/// Emit reference to a ttype global with a specified encoding.
- void EmitTTypeReference(const GlobalValue *GV, unsigned Encoding) const;
+ virtual void emitTTypeReference(const GlobalValue *GV, unsigned Encoding);
/// Emit a reference to a symbol for use in dwarf. Different object formats
/// represent this in different ways. Some use a relocation others encode
@@ -531,18 +618,45 @@
void emitDwarfSymbolReference(const MCSymbol *Label,
bool ForceOffset = false) const;
- /// Emit the 4-byte offset of a string from the start of its section.
+ /// Emit the 4- or 8-byte offset of a string from the start of its section.
///
/// When possible, emit a DwarfStringPool section offset without any
/// relocations, and without using the symbol. Otherwise, defers to \a
/// emitDwarfSymbolReference().
+ ///
+ /// The length of the emitted value depends on the DWARF format.
void emitDwarfStringOffset(DwarfStringPoolEntry S) const;
- /// Emit the 4-byte offset of a string from the start of its section.
+ /// Emit the 4-or 8-byte offset of a string from the start of its section.
void emitDwarfStringOffset(DwarfStringPoolEntryRef S) const {
emitDwarfStringOffset(S.getEntry());
}
+ /// Emit something like ".long Label + Offset" or ".quad Label + Offset"
+ /// depending on the DWARF format.
+ void emitDwarfOffset(const MCSymbol *Label, uint64_t Offset) const;
+
+ /// Emit 32- or 64-bit value depending on the DWARF format.
+ void emitDwarfLengthOrOffset(uint64_t Value) const;
+
+ /// Emit a special value of 0xffffffff if producing 64-bit debugging info.
+ void maybeEmitDwarf64Mark() const;
+
+ /// Emit a unit length field. The actual format, DWARF32 or DWARF64, is chosen
+ /// according to the settings.
+ void emitDwarfUnitLength(uint64_t Length, const Twine &Comment) const;
+
+ /// Emit a unit length field. The actual format, DWARF32 or DWARF64, is chosen
+ /// according to the settings.
+ void emitDwarfUnitLength(const MCSymbol *Hi, const MCSymbol *Lo,
+ const Twine &Comment) const;
+
+ /// Emit reference to a call site with a specified encoding
+ void emitCallSiteOffset(const MCSymbol *Hi, const MCSymbol *Lo,
+ unsigned Encoding) const;
+ /// Emit an integer value corresponding to the call site encoding
+ void emitCallSiteValue(uint64_t Value, unsigned Encoding) const;
+
/// Get the value for DW_AT_APPLE_isa. Zero if no isa encoding specified.
virtual unsigned getISAEncoding() { return 0; }
@@ -550,7 +664,7 @@
///
/// \p Value - The value to emit.
/// \p Size - The size of the integer (in bytes) to emit.
- virtual void EmitDebugValue(const MCExpr *Value, unsigned Size) const;
+ virtual void emitDebugValue(const MCExpr *Value, unsigned Size) const;
//===------------------------------------------------------------------===//
// Dwarf Lowering Routines
@@ -566,7 +680,7 @@
emitDwarfAbbrev(*Abbrev);
// Mark end of abbreviations.
- EmitULEB128(0, "EOM(3)");
+ emitULEB128(0, "EOM(3)");
}
void emitDwarfAbbrev(const DIEAbbrev &Abbrev) const;
@@ -622,12 +736,16 @@
/// This emits visibility information about symbol, if this is supported by
/// the target.
- void EmitVisibility(MCSymbol *Sym, unsigned Visibility,
+ void emitVisibility(MCSymbol *Sym, unsigned Visibility,
bool IsDefinition = true) const;
/// This emits linkage information about \p GVSym based on \p GV, if this is
/// supported by the target.
- void EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const;
+ virtual void emitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const;
+
+ /// Return the alignment for the specified \p GV.
+ static Align getGVAlignment(const GlobalObject *GV, const DataLayout &DL,
+ Align InAlign = Align(1));
private:
/// Private state for PrintSpecial()
@@ -637,18 +755,21 @@
mutable unsigned Counter = ~0U;
/// This method emits the header for the current function.
- virtual void EmitFunctionHeader();
+ virtual void emitFunctionHeader();
+
+ /// This method emits a comment next to header for the current function.
+ virtual void emitFunctionHeaderComment();
/// Emit a blob of inline asm to the output streamer.
void
- EmitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
+ emitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
const MCTargetOptions &MCOptions,
const MDNode *LocMDNode = nullptr,
InlineAsm::AsmDialect AsmDialect = InlineAsm::AD_ATT) const;
/// This method formats and emits the specified machine instruction that is an
/// inline asm.
- void EmitInlineAsm(const MachineInstr *MI) const;
+ void emitInlineAsm(const MachineInstr *MI) const;
/// Add inline assembly info to the diagnostics machinery, so we can
/// emit file and position info. Returns SrcMgr memory buffer position.
@@ -659,21 +780,20 @@
// Internal Implementation Details
//===------------------------------------------------------------------===//
- void EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ void emitJumpTableEntry(const MachineJumpTableInfo *MJTI,
const MachineBasicBlock *MBB, unsigned uid) const;
- void EmitLLVMUsedList(const ConstantArray *InitList);
+ void emitLLVMUsedList(const ConstantArray *InitList);
/// Emit llvm.ident metadata in an '.ident' directive.
- void EmitModuleIdents(Module &M);
+ void emitModuleIdents(Module &M);
/// Emit bytes for llvm.commandline metadata.
- void EmitModuleCommandLines(Module &M);
- void EmitXXStructorList(const DataLayout &DL, const Constant *List,
- bool isCtor);
+ void emitModuleCommandLines(Module &M);
GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &S);
/// Emit GlobalAlias or GlobalIFunc.
void emitGlobalIndirectSymbol(Module &M, const GlobalIndirectSymbol &GIS);
- void setupCodePaddingContext(const MachineBasicBlock &MBB,
- MCCodePaddingContext &Context) const;
+
+ /// This method decides whether the specified basic block requires a label.
+ bool shouldEmitLabelForBasicBlock(const MachineBasicBlock &MBB) const;
};
} // end namespace llvm