mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-23 02:29:18 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65402 91177308-0d34-0410-b5e6-96231b3b80d8
964 lines
33 KiB
C++
964 lines
33 KiB
C++
//===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the helper classes used to build and interpret debug
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// information in LLVM IR form.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/IntrinsicInst.h"
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#include "llvm/Instructions.h"
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#include "llvm/Module.h"
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#include "llvm/Analysis/ValueTracking.h"
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#include "llvm/Support/Streams.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// DIDescriptor
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//===----------------------------------------------------------------------===//
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DIDescriptor::DIDescriptor(GlobalVariable *gv, unsigned RequiredTag) {
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GV = gv;
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// If this is non-null, check to see if the Tag matches. If not, set to null.
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if (GV && getTag() != RequiredTag)
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GV = 0;
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}
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std::string DIDescriptor::getStringField(unsigned Elt) const {
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if (GV == 0) return "";
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Constant *C = GV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return "";
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std::string Result;
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// Fills in the string if it succeeds
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if (!GetConstantStringInfo(C->getOperand(Elt), Result))
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Result.clear();
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return Result;
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}
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uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
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if (GV == 0) return 0;
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Constant *C = GV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return 0;
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if (ConstantInt *CI = dyn_cast<ConstantInt>(C->getOperand(Elt)))
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return CI->getZExtValue();
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return 0;
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}
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DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
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if (GV == 0) return DIDescriptor();
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Constant *C = GV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return DIDescriptor();
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C = C->getOperand(Elt);
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return DIDescriptor(dyn_cast<GlobalVariable>(C->stripPointerCasts()));
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}
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GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
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if (GV == 0) return 0;
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Constant *C = GV->getInitializer();
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if (C == 0 || Elt >= C->getNumOperands())
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return 0;
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C = C->getOperand(Elt);
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return dyn_cast<GlobalVariable>(C->stripPointerCasts());
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}
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//===----------------------------------------------------------------------===//
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// Simple Descriptor Constructors and other Methods
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//===----------------------------------------------------------------------===//
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DIAnchor::DIAnchor(GlobalVariable *GV)
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: DIDescriptor(GV, dwarf::DW_TAG_anchor) {}
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DIEnumerator::DIEnumerator(GlobalVariable *GV)
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: DIDescriptor(GV, dwarf::DW_TAG_enumerator) {}
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DISubrange::DISubrange(GlobalVariable *GV)
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: DIDescriptor(GV, dwarf::DW_TAG_subrange_type) {}
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DICompileUnit::DICompileUnit(GlobalVariable *GV)
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: DIDescriptor(GV, dwarf::DW_TAG_compile_unit) {}
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DIBasicType::DIBasicType(GlobalVariable *GV)
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: DIType(GV, dwarf::DW_TAG_base_type) {}
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DISubprogram::DISubprogram(GlobalVariable *GV)
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: DIGlobal(GV, dwarf::DW_TAG_subprogram) {}
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DIGlobalVariable::DIGlobalVariable(GlobalVariable *GV)
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: DIGlobal(GV, dwarf::DW_TAG_variable) {}
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DIBlock::DIBlock(GlobalVariable *GV)
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: DIDescriptor(GV, dwarf::DW_TAG_lexical_block) {}
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// needed by DIVariable::getType()
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DIType::DIType(GlobalVariable *gv) : DIDescriptor(gv) {
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if (!gv) return;
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unsigned tag = getTag();
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if (tag != dwarf::DW_TAG_base_type && !DIDerivedType::isDerivedType(tag) &&
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!DICompositeType::isCompositeType(tag))
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GV = 0;
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}
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/// isDerivedType - Return true if the specified tag is legal for
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/// DIDerivedType.
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bool DIType::isDerivedType(unsigned Tag) {
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switch (Tag) {
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case dwarf::DW_TAG_typedef:
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case dwarf::DW_TAG_pointer_type:
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case dwarf::DW_TAG_reference_type:
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case dwarf::DW_TAG_const_type:
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case dwarf::DW_TAG_volatile_type:
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case dwarf::DW_TAG_restrict_type:
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case dwarf::DW_TAG_member:
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case dwarf::DW_TAG_inheritance:
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return true;
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default:
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// FIXME: Even though it doesn't make sense, CompositeTypes are current
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// modelled as DerivedTypes, this should return true for them as well.
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return false;
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}
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}
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DIDerivedType::DIDerivedType(GlobalVariable *GV) : DIType(GV, true, true) {
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if (GV && !isDerivedType(getTag()))
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GV = 0;
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}
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/// isCompositeType - Return true if the specified tag is legal for
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/// DICompositeType.
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bool DIType::isCompositeType(unsigned TAG) {
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switch (TAG) {
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case dwarf::DW_TAG_array_type:
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case dwarf::DW_TAG_structure_type:
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case dwarf::DW_TAG_union_type:
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case dwarf::DW_TAG_enumeration_type:
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case dwarf::DW_TAG_vector_type:
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case dwarf::DW_TAG_subroutine_type:
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return true;
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default:
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return false;
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}
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}
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DICompositeType::DICompositeType(GlobalVariable *GV)
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: DIDerivedType(GV, true, true) {
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if (GV && !isCompositeType(getTag()))
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GV = 0;
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}
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/// isVariable - Return true if the specified tag is legal for DIVariable.
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bool DIVariable::isVariable(unsigned Tag) {
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switch (Tag) {
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case dwarf::DW_TAG_auto_variable:
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case dwarf::DW_TAG_arg_variable:
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case dwarf::DW_TAG_return_variable:
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return true;
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default:
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return false;
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}
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}
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DIVariable::DIVariable(GlobalVariable *gv) : DIDescriptor(gv) {
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if (gv && !isVariable(getTag()))
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GV = 0;
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}
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unsigned DIArray::getNumElements() const {
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assert (GV && "Invalid DIArray");
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Constant *C = GV->getInitializer();
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assert (C && "Invalid DIArray initializer");
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return C->getNumOperands();
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}
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/// Verify - Verify that a compile unit is well formed.
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bool DICompileUnit::Verify() const {
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if (isNull())
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return false;
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if (getFilename().empty())
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return false;
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// It is possible that directory and produce string is empty.
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return true;
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}
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/// Verify - Verify that a type descriptor is well formed.
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bool DIType::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.isNull() && !CU.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a composite type descriptor is well formed.
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bool DICompositeType::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.isNull() && !CU.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a subprogram descriptor is well formed.
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bool DISubprogram::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.Verify())
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return false;
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DICompositeType Ty = getType();
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if (!Ty.isNull() && !Ty.Verify())
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return false;
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return true;
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}
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/// Verify - Verify that a global variable descriptor is well formed.
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bool DIGlobalVariable::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DICompileUnit CU = getCompileUnit();
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if (!CU.Verify())
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return false;
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DIType Ty = getType();
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if (!Ty.Verify())
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return false;
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if (!getGlobal())
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return false;
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return true;
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}
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/// Verify - Verify that a variable descriptor is well formed.
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bool DIVariable::Verify() const {
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if (isNull())
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return false;
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if (getContext().isNull())
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return false;
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DIType Ty = getType();
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if (!Ty.Verify())
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return false;
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return true;
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}
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/// getOriginalTypeSize - If this type is derived from a base type then
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/// return base type size.
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uint64_t DIDerivedType::getOriginalTypeSize() const {
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if (getTag() != dwarf::DW_TAG_member)
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return getSizeInBits();
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DIType BT = getTypeDerivedFrom();
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if (BT.getTag() != dwarf::DW_TAG_base_type)
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return getSizeInBits();
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return BT.getSizeInBits();
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}
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//===----------------------------------------------------------------------===//
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// DIFactory: Basic Helpers
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//===----------------------------------------------------------------------===//
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DIFactory::DIFactory(Module &m) : M(m) {
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StopPointFn = FuncStartFn = RegionStartFn = RegionEndFn = DeclareFn = 0;
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EmptyStructPtr = PointerType::getUnqual(StructType::get(NULL, NULL));
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}
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/// getCastToEmpty - Return this descriptor as a Constant* with type '{}*'.
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/// This is only valid when the descriptor is non-null.
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Constant *DIFactory::getCastToEmpty(DIDescriptor D) {
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if (D.isNull()) return Constant::getNullValue(EmptyStructPtr);
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return ConstantExpr::getBitCast(D.getGV(), EmptyStructPtr);
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}
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Constant *DIFactory::GetTagConstant(unsigned TAG) {
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assert((TAG & LLVMDebugVersionMask) == 0 &&
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"Tag too large for debug encoding!");
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return ConstantInt::get(Type::Int32Ty, TAG | LLVMDebugVersion);
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}
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Constant *DIFactory::GetStringConstant(const std::string &String) {
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// Check string cache for previous edition.
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Constant *&Slot = StringCache[String];
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// Return Constant if previously defined.
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if (Slot) return Slot;
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const PointerType *DestTy = PointerType::getUnqual(Type::Int8Ty);
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// If empty string then use a sbyte* null instead.
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if (String.empty())
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return Slot = ConstantPointerNull::get(DestTy);
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// Construct string as an llvm constant.
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Constant *ConstStr = ConstantArray::get(String);
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// Otherwise create and return a new string global.
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GlobalVariable *StrGV = new GlobalVariable(ConstStr->getType(), true,
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GlobalVariable::InternalLinkage,
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ConstStr, ".str", &M);
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StrGV->setSection("llvm.metadata");
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return Slot = ConstantExpr::getBitCast(StrGV, DestTy);
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}
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/// GetOrCreateAnchor - Look up an anchor for the specified tag and name. If it
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/// already exists, return it. If not, create a new one and return it.
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DIAnchor DIFactory::GetOrCreateAnchor(unsigned TAG, const char *Name) {
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const Type *EltTy = StructType::get(Type::Int32Ty, Type::Int32Ty, NULL);
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// Otherwise, create the global or return it if already in the module.
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Constant *C = M.getOrInsertGlobal(Name, EltTy);
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assert(isa<GlobalVariable>(C) && "Incorrectly typed anchor?");
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GlobalVariable *GV = cast<GlobalVariable>(C);
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// If it has an initializer, it is already in the module.
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if (GV->hasInitializer())
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return SubProgramAnchor = DIAnchor(GV);
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GV->setLinkage(GlobalValue::LinkOnceLinkage);
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GV->setSection("llvm.metadata");
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GV->setConstant(true);
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M.addTypeName("llvm.dbg.anchor.type", EltTy);
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// Otherwise, set the initializer.
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Constant *Elts[] = {
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GetTagConstant(dwarf::DW_TAG_anchor),
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ConstantInt::get(Type::Int32Ty, TAG)
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};
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GV->setInitializer(ConstantStruct::get(Elts, 2));
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return DIAnchor(GV);
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}
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//===----------------------------------------------------------------------===//
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// DIFactory: Primary Constructors
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//===----------------------------------------------------------------------===//
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/// GetOrCreateCompileUnitAnchor - Return the anchor for compile units,
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/// creating a new one if there isn't already one in the module.
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DIAnchor DIFactory::GetOrCreateCompileUnitAnchor() {
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// If we already created one, just return it.
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if (!CompileUnitAnchor.isNull())
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return CompileUnitAnchor;
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return CompileUnitAnchor = GetOrCreateAnchor(dwarf::DW_TAG_compile_unit,
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"llvm.dbg.compile_units");
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}
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/// GetOrCreateSubprogramAnchor - Return the anchor for subprograms,
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/// creating a new one if there isn't already one in the module.
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DIAnchor DIFactory::GetOrCreateSubprogramAnchor() {
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// If we already created one, just return it.
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if (!SubProgramAnchor.isNull())
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return SubProgramAnchor;
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return SubProgramAnchor = GetOrCreateAnchor(dwarf::DW_TAG_subprogram,
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"llvm.dbg.subprograms");
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}
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/// GetOrCreateGlobalVariableAnchor - Return the anchor for globals,
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/// creating a new one if there isn't already one in the module.
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DIAnchor DIFactory::GetOrCreateGlobalVariableAnchor() {
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// If we already created one, just return it.
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if (!GlobalVariableAnchor.isNull())
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return GlobalVariableAnchor;
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return GlobalVariableAnchor = GetOrCreateAnchor(dwarf::DW_TAG_variable,
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"llvm.dbg.global_variables");
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}
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/// GetOrCreateArray - Create an descriptor for an array of descriptors.
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/// This implicitly uniques the arrays created.
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DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
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SmallVector<Constant*, 16> Elts;
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for (unsigned i = 0; i != NumTys; ++i)
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Elts.push_back(getCastToEmpty(Tys[i]));
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Constant *Init = ConstantArray::get(ArrayType::get(EmptyStructPtr,
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Elts.size()),
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&Elts[0], Elts.size());
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// If we already have this array, just return the uniqued version.
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DIDescriptor &Entry = SimpleConstantCache[Init];
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if (!Entry.isNull()) return DIArray(Entry.getGV());
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GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
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GlobalValue::InternalLinkage,
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Init, "llvm.dbg.array", &M);
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GV->setSection("llvm.metadata");
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Entry = DIDescriptor(GV);
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return DIArray(GV);
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}
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/// GetOrCreateSubrange - Create a descriptor for a value range. This
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/// implicitly uniques the values returned.
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DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
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Constant *Elts[] = {
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GetTagConstant(dwarf::DW_TAG_subrange_type),
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ConstantInt::get(Type::Int64Ty, Lo),
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ConstantInt::get(Type::Int64Ty, Hi)
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};
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Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
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// If we already have this range, just return the uniqued version.
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DIDescriptor &Entry = SimpleConstantCache[Init];
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if (!Entry.isNull()) return DISubrange(Entry.getGV());
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M.addTypeName("llvm.dbg.subrange.type", Init->getType());
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GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
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GlobalValue::InternalLinkage,
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Init, "llvm.dbg.subrange", &M);
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GV->setSection("llvm.metadata");
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Entry = DIDescriptor(GV);
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return DISubrange(GV);
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}
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/// CreateCompileUnit - Create a new descriptor for the specified compile
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/// unit. Note that this does not unique compile units within the module.
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DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
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const std::string &Filename,
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const std::string &Directory,
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const std::string &Producer,
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bool isMain,
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bool isOptimized,
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const char *Flags,
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unsigned RunTimeVer) {
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Constant *Elts[] = {
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GetTagConstant(dwarf::DW_TAG_compile_unit),
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getCastToEmpty(GetOrCreateCompileUnitAnchor()),
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ConstantInt::get(Type::Int32Ty, LangID),
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GetStringConstant(Filename),
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GetStringConstant(Directory),
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GetStringConstant(Producer),
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ConstantInt::get(Type::Int1Ty, isMain),
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ConstantInt::get(Type::Int1Ty, isOptimized),
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GetStringConstant(Flags),
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ConstantInt::get(Type::Int32Ty, RunTimeVer)
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};
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Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
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M.addTypeName("llvm.dbg.compile_unit.type", Init->getType());
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GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
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GlobalValue::InternalLinkage,
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Init, "llvm.dbg.compile_unit", &M);
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GV->setSection("llvm.metadata");
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return DICompileUnit(GV);
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}
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/// CreateEnumerator - Create a single enumerator value.
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DIEnumerator DIFactory::CreateEnumerator(const std::string &Name, uint64_t Val){
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Constant *Elts[] = {
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GetTagConstant(dwarf::DW_TAG_enumerator),
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GetStringConstant(Name),
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ConstantInt::get(Type::Int64Ty, Val)
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};
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Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
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M.addTypeName("llvm.dbg.enumerator.type", Init->getType());
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GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
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GlobalValue::InternalLinkage,
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Init, "llvm.dbg.enumerator", &M);
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GV->setSection("llvm.metadata");
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return DIEnumerator(GV);
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}
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/// CreateBasicType - Create a basic type like int, float, etc.
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DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
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const std::string &Name,
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DICompileUnit CompileUnit,
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unsigned LineNumber,
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uint64_t SizeInBits,
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uint64_t AlignInBits,
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uint64_t OffsetInBits, unsigned Flags,
|
|
unsigned Encoding) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_base_type),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNumber),
|
|
ConstantInt::get(Type::Int64Ty, SizeInBits),
|
|
ConstantInt::get(Type::Int64Ty, AlignInBits),
|
|
ConstantInt::get(Type::Int64Ty, OffsetInBits),
|
|
ConstantInt::get(Type::Int32Ty, Flags),
|
|
ConstantInt::get(Type::Int32Ty, Encoding)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.basictype.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.basictype", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DIBasicType(GV);
|
|
}
|
|
|
|
/// CreateDerivedType - Create a derived type like const qualified type,
|
|
/// pointer, typedef, etc.
|
|
DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
|
|
DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNumber,
|
|
uint64_t SizeInBits,
|
|
uint64_t AlignInBits,
|
|
uint64_t OffsetInBits,
|
|
unsigned Flags,
|
|
DIType DerivedFrom) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNumber),
|
|
ConstantInt::get(Type::Int64Ty, SizeInBits),
|
|
ConstantInt::get(Type::Int64Ty, AlignInBits),
|
|
ConstantInt::get(Type::Int64Ty, OffsetInBits),
|
|
ConstantInt::get(Type::Int32Ty, Flags),
|
|
getCastToEmpty(DerivedFrom)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.derivedtype.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.derivedtype", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DIDerivedType(GV);
|
|
}
|
|
|
|
/// CreateCompositeType - Create a composite type like array, struct, etc.
|
|
DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
|
|
DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNumber,
|
|
uint64_t SizeInBits,
|
|
uint64_t AlignInBits,
|
|
uint64_t OffsetInBits,
|
|
unsigned Flags,
|
|
DIType DerivedFrom,
|
|
DIArray Elements,
|
|
unsigned RuntimeLang) {
|
|
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNumber),
|
|
ConstantInt::get(Type::Int64Ty, SizeInBits),
|
|
ConstantInt::get(Type::Int64Ty, AlignInBits),
|
|
ConstantInt::get(Type::Int64Ty, OffsetInBits),
|
|
ConstantInt::get(Type::Int32Ty, Flags),
|
|
getCastToEmpty(DerivedFrom),
|
|
getCastToEmpty(Elements),
|
|
ConstantInt::get(Type::Int32Ty, RuntimeLang)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.composite.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.composite", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DICompositeType(GV);
|
|
}
|
|
|
|
|
|
/// CreateSubprogram - Create a new descriptor for the specified subprogram.
|
|
/// See comments in DISubprogram for descriptions of these fields. This
|
|
/// method does not unique the generated descriptors.
|
|
DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
|
|
const std::string &Name,
|
|
const std::string &DisplayName,
|
|
const std::string &LinkageName,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNo, DIType Type,
|
|
bool isLocalToUnit,
|
|
bool isDefinition) {
|
|
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_subprogram),
|
|
getCastToEmpty(GetOrCreateSubprogramAnchor()),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
GetStringConstant(DisplayName),
|
|
GetStringConstant(LinkageName),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type),
|
|
ConstantInt::get(Type::Int1Ty, isLocalToUnit),
|
|
ConstantInt::get(Type::Int1Ty, isDefinition)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.subprogram.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.subprogram", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DISubprogram(GV);
|
|
}
|
|
|
|
/// CreateGlobalVariable - Create a new descriptor for the specified global.
|
|
DIGlobalVariable
|
|
DIFactory::CreateGlobalVariable(DIDescriptor Context, const std::string &Name,
|
|
const std::string &DisplayName,
|
|
const std::string &LinkageName,
|
|
DICompileUnit CompileUnit,
|
|
unsigned LineNo, DIType Type,bool isLocalToUnit,
|
|
bool isDefinition, llvm::GlobalVariable *Val) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_variable),
|
|
getCastToEmpty(GetOrCreateGlobalVariableAnchor()),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
GetStringConstant(DisplayName),
|
|
GetStringConstant(LinkageName),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type),
|
|
ConstantInt::get(Type::Int1Ty, isLocalToUnit),
|
|
ConstantInt::get(Type::Int1Ty, isDefinition),
|
|
ConstantExpr::getBitCast(Val, EmptyStructPtr)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.global_variable.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.global_variable", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DIGlobalVariable(GV);
|
|
}
|
|
|
|
|
|
/// CreateVariable - Create a new descriptor for the specified variable.
|
|
DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
|
|
const std::string &Name,
|
|
DICompileUnit CompileUnit, unsigned LineNo,
|
|
DIType Type) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(Tag),
|
|
getCastToEmpty(Context),
|
|
GetStringConstant(Name),
|
|
getCastToEmpty(CompileUnit),
|
|
ConstantInt::get(Type::Int32Ty, LineNo),
|
|
getCastToEmpty(Type)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.variable.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.variable", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DIVariable(GV);
|
|
}
|
|
|
|
|
|
/// CreateBlock - This creates a descriptor for a lexical block with the
|
|
/// specified parent context.
|
|
DIBlock DIFactory::CreateBlock(DIDescriptor Context) {
|
|
Constant *Elts[] = {
|
|
GetTagConstant(dwarf::DW_TAG_lexical_block),
|
|
getCastToEmpty(Context)
|
|
};
|
|
|
|
Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
|
|
|
|
M.addTypeName("llvm.dbg.block.type", Init->getType());
|
|
GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
|
|
GlobalValue::InternalLinkage,
|
|
Init, "llvm.dbg.block", &M);
|
|
GV->setSection("llvm.metadata");
|
|
return DIBlock(GV);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// DIFactory: Routines for inserting code into a function
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// InsertStopPoint - Create a new llvm.dbg.stoppoint intrinsic invocation,
|
|
/// inserting it at the end of the specified basic block.
|
|
void DIFactory::InsertStopPoint(DICompileUnit CU, unsigned LineNo,
|
|
unsigned ColNo, BasicBlock *BB) {
|
|
|
|
// Lazily construct llvm.dbg.stoppoint function.
|
|
if (!StopPointFn)
|
|
StopPointFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_stoppoint);
|
|
|
|
// Invoke llvm.dbg.stoppoint
|
|
Value *Args[] = {
|
|
llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo),
|
|
llvm::ConstantInt::get(llvm::Type::Int32Ty, ColNo),
|
|
getCastToEmpty(CU)
|
|
};
|
|
CallInst::Create(StopPointFn, Args, Args+3, "", BB);
|
|
}
|
|
|
|
/// InsertSubprogramStart - Create a new llvm.dbg.func.start intrinsic to
|
|
/// mark the start of the specified subprogram.
|
|
void DIFactory::InsertSubprogramStart(DISubprogram SP, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.func.start.
|
|
if (!FuncStartFn)
|
|
FuncStartFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_func_start);
|
|
|
|
// Call llvm.dbg.func.start which also implicitly sets a stoppoint.
|
|
CallInst::Create(FuncStartFn, getCastToEmpty(SP), "", BB);
|
|
}
|
|
|
|
/// InsertRegionStart - Insert a new llvm.dbg.region.start intrinsic call to
|
|
/// mark the start of a region for the specified scoping descriptor.
|
|
void DIFactory::InsertRegionStart(DIDescriptor D, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.region.start function.
|
|
if (!RegionStartFn)
|
|
RegionStartFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_region_start);
|
|
// Call llvm.dbg.func.start.
|
|
CallInst::Create(RegionStartFn, getCastToEmpty(D), "", BB);
|
|
}
|
|
|
|
|
|
/// InsertRegionEnd - Insert a new llvm.dbg.region.end intrinsic call to
|
|
/// mark the end of a region for the specified scoping descriptor.
|
|
void DIFactory::InsertRegionEnd(DIDescriptor D, BasicBlock *BB) {
|
|
// Lazily construct llvm.dbg.region.end function.
|
|
if (!RegionEndFn)
|
|
RegionEndFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_region_end);
|
|
|
|
CallInst::Create(RegionEndFn, getCastToEmpty(D), "", BB);
|
|
}
|
|
|
|
/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
|
|
void DIFactory::InsertDeclare(llvm::Value *Storage, DIVariable D,
|
|
BasicBlock *BB) {
|
|
// Cast the storage to a {}* for the call to llvm.dbg.declare.
|
|
Storage = new llvm::BitCastInst(Storage, EmptyStructPtr, "", BB);
|
|
|
|
if (!DeclareFn)
|
|
DeclareFn = llvm::Intrinsic::getDeclaration(&M,
|
|
llvm::Intrinsic::dbg_declare);
|
|
Value *Args[] = { Storage, getCastToEmpty(D) };
|
|
CallInst::Create(DeclareFn, Args, Args+2, "", BB);
|
|
}
|
|
|
|
namespace llvm {
|
|
/// Finds the stoppoint coressponding to this instruction, that is the
|
|
/// stoppoint that dominates this instruction
|
|
const DbgStopPointInst *findStopPoint(const Instruction *Inst)
|
|
{
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(Inst))
|
|
return DSI;
|
|
|
|
const BasicBlock *BB = Inst->getParent();
|
|
BasicBlock::const_iterator I = Inst, B;
|
|
do {
|
|
B = BB->begin();
|
|
// A BB consisting only of a terminator can't have a stoppoint.
|
|
if (I != B) {
|
|
do {
|
|
--I;
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
|
|
return DSI;
|
|
} while (I != B);
|
|
}
|
|
// This BB didn't have a stoppoint: if there is only one
|
|
// predecessor, look for a stoppoint there.
|
|
// We could use getIDom(), but that would require dominator info.
|
|
BB = I->getParent()->getUniquePredecessor();
|
|
if (BB)
|
|
I = BB->getTerminator();
|
|
} while (BB != 0);
|
|
return 0;
|
|
}
|
|
|
|
/// Finds the stoppoint corresponding to first real (non-debug intrinsic)
|
|
/// instruction in this Basic Block, and returns the stoppoint for it.
|
|
const DbgStopPointInst *findBBStopPoint(const BasicBlock *BB)
|
|
{
|
|
for(BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
|
|
if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
|
|
return DSI;
|
|
}
|
|
// Fallback to looking for stoppoint of unique predecessor.
|
|
// Useful if this BB contains no stoppoints, but unique predecessor does.
|
|
BB = BB->getUniquePredecessor();
|
|
if (BB)
|
|
return findStopPoint(BB->getTerminator());
|
|
return 0;
|
|
}
|
|
|
|
/// Finds the dbg.declare intrinsic corresponding to this value if any.
|
|
/// It looks through pointer casts too.
|
|
const DbgDeclareInst *findDbgDeclare(const Value *V, bool stripCasts)
|
|
{
|
|
if (stripCasts) {
|
|
V = V->stripPointerCasts();
|
|
// Look for the bitcast.
|
|
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
|
|
I != E; ++I) {
|
|
if (isa<BitCastInst>(I))
|
|
return findDbgDeclare(*I, false);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Find dbg.declare among uses of the instruction.
|
|
for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
|
|
I != E; ++I) {
|
|
if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I))
|
|
return DDI;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/// dump - print compile unit.
|
|
void DICompileUnit::dump() const {
|
|
if (getLanguage())
|
|
cerr << " [" << dwarf::LanguageString(getLanguage()) << "] ";
|
|
cerr << " [" << getDirectory() << "/" << getFilename() << " ]";
|
|
}
|
|
|
|
/// dump - print type.
|
|
void DIType::dump() const {
|
|
if (isNull()) return;
|
|
if (!getName().empty())
|
|
cerr << " [" << getName() << "] ";
|
|
unsigned Tag = getTag();
|
|
cerr << " [" << dwarf::TagString(Tag) << "] ";
|
|
// TODO : Print context
|
|
getCompileUnit().dump();
|
|
cerr << " ["
|
|
<< getLineNumber() << ", "
|
|
<< getSizeInBits() << ", "
|
|
<< getAlignInBits() << ", "
|
|
<< getOffsetInBits()
|
|
<< "] ";
|
|
if (isPrivate())
|
|
cerr << " [private] ";
|
|
else if (isProtected())
|
|
cerr << " [protected] ";
|
|
if (isForwardDecl())
|
|
cerr << " [fwd] ";
|
|
|
|
if (isBasicType(Tag))
|
|
DIBasicType(GV).dump();
|
|
else if (isDerivedType(Tag))
|
|
DIDerivedType(GV).dump();
|
|
else if (isCompositeType(Tag))
|
|
DICompositeType(GV).dump();
|
|
else {
|
|
cerr << "Invalid DIType\n";
|
|
return;
|
|
}
|
|
cerr << "\n";
|
|
}
|
|
|
|
/// dump - print basic type.
|
|
void DIBasicType::dump() const {
|
|
cerr << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
|
|
|
|
}
|
|
|
|
/// dump - print derived type.
|
|
void DIDerivedType::dump() const {
|
|
cerr << "\n\t Derived From: "; getTypeDerivedFrom().dump();
|
|
}
|
|
|
|
/// dump - print composite type.
|
|
void DICompositeType::dump() const {
|
|
DIArray A = getTypeArray();
|
|
if (A.isNull())
|
|
return;
|
|
cerr << " [" << A.getNumElements() << " elements]";
|
|
}
|
|
|
|
/// dump - print global.
|
|
void DIGlobal::dump() const {
|
|
|
|
if (!getName().empty())
|
|
cerr << " [" << getName() << "] ";
|
|
unsigned Tag = getTag();
|
|
cerr << " [" << dwarf::TagString(Tag) << "] ";
|
|
// TODO : Print context
|
|
getCompileUnit().dump();
|
|
cerr << " [" << getLineNumber() << "] ";
|
|
if (isLocalToUnit())
|
|
cerr << " [local] ";
|
|
if (isDefinition())
|
|
cerr << " [def] ";
|
|
|
|
if (isGlobalVariable(Tag))
|
|
DIGlobalVariable(GV).dump();
|
|
|
|
cerr << "\n";
|
|
}
|
|
|
|
/// dump - print subprogram.
|
|
void DISubprogram::dump() const {
|
|
DIGlobal::dump();
|
|
}
|
|
|
|
/// dump - print global variable.
|
|
void DIGlobalVariable::dump() const {
|
|
cerr << " ["; getGlobal()->dump(); cerr << "] ";
|
|
}
|
|
|
|
/// dump - print variable.
|
|
void DIVariable::dump() const {
|
|
if (!getName().empty())
|
|
cerr << " [" << getName() << "] ";
|
|
getCompileUnit().dump();
|
|
cerr << " [" << getLineNumber() << "] ";
|
|
getType().dump();
|
|
cerr << "\n";
|
|
}
|