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Align definition of DW_OP_plus with DWARF spec [3/3] 

Summary:
This patch is part of 3 patches that together form a single patch, but must be introduced in stages in order not to break things.
 
The way that LLVM interprets DW_OP_plus in DIExpression nodes is basically that of the DW_OP_plus_uconst operator since LLVM expects an unsigned constant operand. This unnecessarily restricts the DW_OP_plus operator, preventing it from being used to describe the evaluation of runtime values on the expression stack. These patches try to align the semantics of DW_OP_plus and DW_OP_minus with that of the DWARF definition, which pops two elements off the expression stack, performs the operation and pushes the result back on the stack.
 
This is done in three stages:
• The first patch (LLVM) adds support for DW_OP_plus_uconst.
• The second patch (Clang) contains changes all its uses from DW_OP_plus to DW_OP_plus_uconst.
• The third patch (LLVM) changes the semantics of DW_OP_plus and DW_OP_minus to be in line with its DWARF meaning. This patch includes the bitcode upgrade from legacy DIExpressions.

Patch by Sander de Smalen.

Reviewers: echristo, pcc, aprantl

Reviewed By: aprantl

Subscribers: fhahn, javed.absar, aprantl, llvm-commits

Differential Revision: https://reviews.llvm.org/D33894

llvm-svn: 305386
This commit is contained in:
Florian Hahn 2017-06-14 13:14:38 +00:00
parent 3f250380d4
commit ffc498dfcc
33 changed files with 200 additions and 114 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
llvm/docs/LangRef.rst
View File

@ -4404,7 +4404,11 @@ referenced LLVM variable relates to the source language variable.
The current supported vocabulary is limited:
- ``DW_OP_deref`` dereferences the top of the expression stack.
- ``DW_OP_plus, 93`` adds ``93`` to the working expression.
- ``DW_OP_plus`` pops the last two entries from the expression stack, adds
them together and appends the result to the expression stack.
- ``DW_OP_minus`` pops the last two entries from the expression stack, subtracts
the last entry from the second last entry and appends the result to the
expression stack.
- ``DW_OP_plus_uconst, 93`` adds ``93`` to the working expression.
- ``DW_OP_LLVM_fragment, 16, 8`` specifies the offset and size (``16`` and ``8``
here, respectively) of the variable fragment from the working expression. Note
@ -4427,10 +4431,10 @@ combined with a concrete location.
.. code-block:: llvm
!0 = !DIExpression(DW_OP_deref)
!1 = !DIExpression(DW_OP_plus, 3)
!1 = !DIExpression(DW_OP_plus_uconst, 3)
!1 = !DIExpression(DW_OP_constu, 3, DW_OP_plus)
!2 = !DIExpression(DW_OP_bit_piece, 3, 7)
!3 = !DIExpression(DW_OP_deref, DW_OP_plus, 3, DW_OP_LLVM_fragment, 3, 7)
!3 = !DIExpression(DW_OP_deref, DW_OP_constu, 3, DW_OP_plus, DW_OP_LLVM_fragment, 3, 7)
!4 = !DIExpression(DW_OP_constu, 2, DW_OP_swap, DW_OP_xderef)
!5 = !DIExpression(DW_OP_constu, 42, DW_OP_stack_value)

3
llvm/include/llvm/IR/DebugInfoMetadata.h
View File

@ -2117,9 +2117,6 @@ public:
/// variable, or the location of a single piece of a variable, or (when using
/// DW_OP_stack_value) is the constant variable value.
///
/// FIXME: Instead of DW_OP_plus taking an argument, this should use DW_OP_const
/// and have DW_OP_plus consume the topmost elements on the stack.
///
/// TODO: Co-allocate the expression elements.
/// TODO: Separate from MDNode, or otherwise drop Distinct and Temporary
/// storage types.

123
llvm/lib/Bitcode/Reader/MetadataLoader.cpp
View File

@ -407,6 +407,11 @@ void PlaceholderQueue::flush(BitcodeReaderMetadataList &MetadataList) {
} // anonynous namespace
static Error error(const Twine &Message) {
return make_error<StringError>(
Message, make_error_code(BitcodeError::CorruptedBitcode));
}
class MetadataLoader::MetadataLoaderImpl {
BitcodeReaderMetadataList MetadataList;
BitcodeReaderValueList &ValueList;
@ -533,6 +538,88 @@ class MetadataLoader::MetadataLoaderImpl {
}
}
/// Upgrade the expression from previous versions.
Error upgradeDIExpression(uint64_t FromVersion,
MutableArrayRef<uint64_t> &Expr,
SmallVectorImpl<uint64_t> &Buffer) {
auto N = Expr.size();
switch (FromVersion) {
default:
return error("Invalid record");
case 0:
if (N >= 3 && Expr[N - 3] == dwarf::DW_OP_bit_piece)
Expr[N - 3] = dwarf::DW_OP_LLVM_fragment;
LLVM_FALLTHROUGH;
case 1:
// Move DW_OP_deref to the end.
if (N && Expr[0] == dwarf::DW_OP_deref) {
auto End = Expr.end();
if (Expr.size() >= 3 &&
*std::prev(End, 3) == dwarf::DW_OP_LLVM_fragment)
End = std::prev(End, 3);
std::move(std::next(Expr.begin()), End, Expr.begin());
*std::prev(End) = dwarf::DW_OP_deref;
}
NeedDeclareExpressionUpgrade = true;
LLVM_FALLTHROUGH;
case 2: {
// Change DW_OP_plus to DW_OP_plus_uconst.
// Change DW_OP_minus to DW_OP_uconst, DW_OP_minus
auto SubExpr = ArrayRef<uint64_t>(Expr);
while (!SubExpr.empty()) {
// Skip past other operators with their operands
// for this version of the IR, obtained from
// from historic DIExpression::ExprOperand::getSize().
size_t HistoricSize;
switch (SubExpr.front()) {
default:
HistoricSize = 1;
break;
case dwarf::DW_OP_constu:
case dwarf::DW_OP_minus:
case dwarf::DW_OP_plus:
HistoricSize = 2;
break;
case dwarf::DW_OP_LLVM_fragment:
HistoricSize = 3;
break;
}
// If the expression is malformed, make sure we don't
// copy more elements than we should.
HistoricSize = std::min(SubExpr.size(), HistoricSize);
ArrayRef<uint64_t> Args = SubExpr.slice(1, HistoricSize-1);
switch (SubExpr.front()) {
case dwarf::DW_OP_plus:
Buffer.push_back(dwarf::DW_OP_plus_uconst);
Buffer.append(Args.begin(), Args.end());
break;
case dwarf::DW_OP_minus:
Buffer.push_back(dwarf::DW_OP_constu);
Buffer.append(Args.begin(), Args.end());
Buffer.push_back(dwarf::DW_OP_minus);
break;
default:
Buffer.push_back(*SubExpr.begin());
Buffer.append(Args.begin(), Args.end());
break;
}
// Continue with remaining elements.
SubExpr = SubExpr.slice(HistoricSize);
}
Expr = MutableArrayRef<uint64_t>(Buffer);
LLVM_FALLTHROUGH;
}
case 3:
// Up-to-date!
break;
}
return Error::success();
}
void upgradeDebugInfo() {
upgradeCUSubprograms();
upgradeCUVariables();
@ -590,11 +677,6 @@ public:
void upgradeDebugIntrinsics(Function &F) { upgradeDeclareExpressions(F); }
};
static Error error(const Twine &Message) {
return make_error<StringError>(
Message, make_error_code(BitcodeError::CorruptedBitcode));
}
Expected<bool>
MetadataLoader::MetadataLoaderImpl::lazyLoadModuleMetadataBlock() {
IndexCursor = Stream;
@ -1551,34 +1633,13 @@ Error MetadataLoader::MetadataLoaderImpl::parseOneMetadata(
IsDistinct = Record[0] & 1;
uint64_t Version = Record[0] >> 1;
auto Elts = MutableArrayRef<uint64_t>(Record).slice(1);
unsigned N = Elts.size();
// Perform various upgrades.
switch (Version) {
case 0:
if (N >= 3 && Elts[N - 3] == dwarf::DW_OP_bit_piece)
Elts[N - 3] = dwarf::DW_OP_LLVM_fragment;
LLVM_FALLTHROUGH;
case 1:
// Move DW_OP_deref to the end.
if (N && Elts[0] == dwarf::DW_OP_deref) {
auto End = Elts.end();
if (Elts.size() >= 3 && *std::prev(End, 3) == dwarf::DW_OP_LLVM_fragment)
End = std::prev(End, 3);
std::move(std::next(Elts.begin()), End, Elts.begin());
*std::prev(End) = dwarf::DW_OP_deref;
}
NeedDeclareExpressionUpgrade = true;
LLVM_FALLTHROUGH;
case 2:
// Up-to-date!
break;
default:
return error("Invalid record");
}
SmallVector<uint64_t, 6> Buffer;
if (Error Err = upgradeDIExpression(Version, Elts, Buffer))
return Err;
MetadataList.assignValue(
GET_OR_DISTINCT(DIExpression, (Context, makeArrayRef(Record).slice(1))),
NextMetadataNo);
GET_OR_DISTINCT(DIExpression, (Context, Elts)), NextMetadataNo);
NextMetadataNo++;
break;
}

2
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -1663,7 +1663,7 @@ void ModuleBitcodeWriter::writeDIExpression(const DIExpression *N,
SmallVectorImpl<uint64_t> &Record,
unsigned Abbrev) {
Record.reserve(N->getElements().size() + 1);
const uint64_t Version = 2 << 1;
const uint64_t Version = 3 << 1;
Record.push_back((uint64_t)N->isDistinct() | Version);
Record.append(N->elements_begin(), N->elements_end());

6
llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
View File

@ -552,7 +552,7 @@ DIE *DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV,
int Offset = TFI->getFrameIndexReference(*Asm->MF, Fragment.FI, FrameReg);
DwarfExpr.addFragmentOffset(Expr);
SmallVector<uint64_t, 8> Ops;
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Offset);
Ops.append(Expr->elements_begin(), Expr->elements_end());
DIExpressionCursor Cursor(Ops);
@ -821,7 +821,7 @@ void DwarfCompileUnit::addAddress(DIE &Die, dwarf::Attribute Attribute,
SmallVector<uint64_t, 8> Ops;
if (Location.isIndirect() && Location.getOffset()) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Location.getOffset());
}
DIExpressionCursor Cursor(Ops);
@ -850,7 +850,7 @@ void DwarfCompileUnit::addComplexAddress(const DbgVariable &DV, DIE &Die,
SmallVector<uint64_t, 8> Ops;
if (Location.isIndirect() && Location.getOffset()) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Location.getOffset());
}
Ops.append(DIExpr->elements_begin(), DIExpr->elements_end());

2
llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1511,7 +1511,7 @@ static void emitDebugLocValue(const AsmPrinter &AP, const DIBasicType *BT,
DwarfExpr.setMemoryLocationKind();
SmallVector<uint64_t, 8> Ops;
if (Location.isIndirect() && Location.getOffset()) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Location.getOffset());
}
Ops.append(DIExpr->elements_begin(), DIExpr->elements_end());

26
llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp
View File

@ -254,15 +254,19 @@ bool DwarfExpression::addMachineRegExpression(const TargetRegisterInfo &TRI,
ExprCursor.take();
}
// [Reg, Offset, DW_OP_plus] --> [DW_OP_breg, Offset].
// [Reg, Offset, DW_OP_minus] --> [DW_OP_breg, -Offset].
// [Reg, DW_OP_constu, Offset, DW_OP_plus] --> [DW_OP_breg, Offset]
// [Reg, DW_OP_constu, Offset, DW_OP_minus] --> [DW_OP_breg,-Offset]
// If Reg is a subregister we need to mask it out before subtracting.
if (Op && ((Op->getOp() == dwarf::DW_OP_plus) ||
(Op->getOp() == dwarf::DW_OP_minus && !SubRegisterSizeInBits))) {
int Offset = Op->getArg(0);
SignedOffset = (Op->getOp() == dwarf::DW_OP_plus) ? Offset : -Offset;
ExprCursor.take();
if (Op && Op->getOp() == dwarf::DW_OP_constu) {
auto N = ExprCursor.peekNext();
if (N && (N->getOp() == dwarf::DW_OP_plus ||
(N->getOp() == dwarf::DW_OP_minus && !SubRegisterSizeInBits))) {
int Offset = Op->getArg(0);
SignedOffset = (N->getOp() == dwarf::DW_OP_minus) ? -Offset : Offset;
ExprCursor.consume(2);
}
}
if (FBReg)
addFBReg(SignedOffset);
else
@ -326,18 +330,14 @@ void DwarfExpression::addExpression(DIExpressionCursor &&ExprCursor,
LocationKind = Unknown;
return;
}
case dwarf::DW_OP_plus:
case dwarf::DW_OP_plus_uconst:
assert(LocationKind != Register);
emitOp(dwarf::DW_OP_plus_uconst);
emitUnsigned(Op->getArg(0));
break;
case dwarf::DW_OP_plus:
case dwarf::DW_OP_minus:
assert(LocationKind != Register);
// There is no DW_OP_minus_uconst.
emitOp(dwarf::DW_OP_constu);
emitUnsigned(Op->getArg(0));
emitOp(dwarf::DW_OP_minus);
emitOp(Op->getOp());
break;
case dwarf::DW_OP_deref: {
assert(LocationKind != Register);

3
llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
View File

@ -42,6 +42,9 @@ public:
DIExpressionCursor(ArrayRef<uint64_t> Expr)
: Start(Expr.begin()), End(Expr.end()) {}
DIExpressionCursor(const DIExpressionCursor &C)
: Start(C.Start), End(C.End) {}
/// Consume one operation.
Optional<DIExpression::ExprOperand> take() {
if (Start == End)

6
llvm/lib/CodeGen/AsmPrinter/DwarfUnit.cpp
View File

@ -475,7 +475,7 @@ void DwarfUnit::addBlockByrefAddress(const DbgVariable &DV, DIE &Die,
SmallVector<uint64_t, 9> Ops;
if (Location.isIndirect() && Location.getOffset()) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Location.getOffset());
}
// If we started with a pointer to the __Block_byref... struct, then
@ -487,7 +487,7 @@ void DwarfUnit::addBlockByrefAddress(const DbgVariable &DV, DIE &Die,
// DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
// adding the offset if it's 0.
if (forwardingFieldOffset > 0) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(forwardingFieldOffset);
}
@ -499,7 +499,7 @@ void DwarfUnit::addBlockByrefAddress(const DbgVariable &DV, DIE &Die,
// for the variable's field to get to the location of the actual variable:
// DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
if (varFieldOffset > 0) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(varFieldOffset);
}

27
llvm/lib/IR/DebugInfoMetadata.cpp
View File

@ -598,9 +598,7 @@ unsigned DIExpression::ExprOperand::getSize() const {
case dwarf::DW_OP_LLVM_fragment:
return 3;
case dwarf::DW_OP_constu:
case dwarf::DW_OP_plus:
case dwarf::DW_OP_plus_uconst:
case dwarf::DW_OP_minus:
return 2;
default:
return 1;
@ -666,11 +664,12 @@ DIExpression::getFragmentInfo(expr_op_iterator Start, expr_op_iterator End) {
void DIExpression::appendOffset(SmallVectorImpl<uint64_t> &Ops,
int64_t Offset) {
if (Offset > 0) {
Ops.push_back(dwarf::DW_OP_plus);
Ops.push_back(dwarf::DW_OP_plus_uconst);
Ops.push_back(Offset);
} else if (Offset < 0) {
Ops.push_back(dwarf::DW_OP_minus);
Ops.push_back(dwarf::DW_OP_constu);
Ops.push_back(-Offset);
Ops.push_back(dwarf::DW_OP_minus);
}
}
@ -679,17 +678,23 @@ bool DIExpression::extractIfOffset(int64_t &Offset) const {
Offset = 0;
return true;
}
if (getNumElements() != 2)
return false;
if (Elements[0] == dwarf::DW_OP_plus ||
Elements[0] == dwarf::DW_OP_plus_uconst) {
if (getNumElements() == 2 && Elements[0] == dwarf::DW_OP_plus_uconst) {
Offset = Elements[1];
return true;
}
if (Elements[0] == dwarf::DW_OP_minus) {
Offset = -Elements[1];
return true;
if (getNumElements() == 3 && Elements[0] == dwarf::DW_OP_constu) {
if (Elements[2] == dwarf::DW_OP_plus) {
Offset = Elements[1];
return true;
}
if (Elements[2] == dwarf::DW_OP_minus) {
Offset = -Elements[1];
return true;
}
}
return false;
}

2
llvm/lib/IR/Metadata.cpp
View File

@ -1470,7 +1470,7 @@ void GlobalObject::copyMetadata(const GlobalObject *Other, unsigned Offset) {
if (E)
OrigElements = E->getElements();
std::vector<uint64_t> Elements(OrigElements.size() + 2);
Elements[0] = dwarf::DW_OP_plus;
Elements[0] = dwarf::DW_OP_plus_uconst;
Elements[1] = Offset;
std::copy(OrigElements.begin(), OrigElements.end(), Elements.begin() + 2);
E = DIExpression::get(getContext(), Elements);

8
llvm/test/Assembler/diexpression.ll
View File

@ -6,15 +6,15 @@
; CHECK: !0 = !DIExpression()
; CHECK-NEXT: !1 = !DIExpression(DW_OP_deref)
; CHECK-NEXT: !2 = !DIExpression(DW_OP_plus, 3)
; CHECK-NEXT: !2 = !DIExpression(DW_OP_constu, 3, DW_OP_plus)
; CHECK-NEXT: !3 = !DIExpression(DW_OP_LLVM_fragment, 3, 7)
; CHECK-NEXT: !4 = !DIExpression(DW_OP_deref, DW_OP_plus, 3, DW_OP_LLVM_fragment, 3, 7)
; CHECK-NEXT: !4 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 3, DW_OP_LLVM_fragment, 3, 7)
; CHECK-NEXT: !5 = !DIExpression(DW_OP_constu, 2, DW_OP_swap, DW_OP_xderef)
; CHECK-NEXT: !6 = !DIExpression(DW_OP_plus_uconst, 3)
!0 = !DIExpression()
!1 = !DIExpression(DW_OP_deref)
!2 = !DIExpression(DW_OP_plus, 3)
!2 = !DIExpression(DW_OP_constu, 3, DW_OP_plus)
!3 = !DIExpression(DW_OP_LLVM_fragment, 3, 7)
!4 = !DIExpression(DW_OP_deref, DW_OP_plus, 3, DW_OP_LLVM_fragment, 3, 7)
!4 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 3, DW_OP_LLVM_fragment, 3, 7)
!5 = !DIExpression(DW_OP_constu, 2, DW_OP_swap, DW_OP_xderef)
!6 = !DIExpression(DW_OP_plus_uconst, 3)

6
llvm/test/Bitcode/DIExpression-deref.ll
View File

@ -11,11 +11,11 @@
!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
; DW_OP_deref should be moved to the back of the expression.
;
; CHECK: !DIExpression(DW_OP_plus, 0, DW_OP_deref, DW_OP_LLVM_fragment, 8, 32)
; CHECK: !DIExpression(DW_OP_plus_uconst, 0, DW_OP_deref, DW_OP_LLVM_fragment, 8, 32)
!6 = !DIExpression(DW_OP_deref, DW_OP_plus, 0, DW_OP_LLVM_fragment, 8, 32)
; CHECK: !DIExpression(DW_OP_plus, 0, DW_OP_deref)
; CHECK: !DIExpression(DW_OP_plus_uconst, 0, DW_OP_deref)
!7 = !DIExpression(DW_OP_deref, DW_OP_plus, 0)
; CHECK: !DIExpression(DW_OP_plus, 1, DW_OP_deref)
; CHECK: !DIExpression(DW_OP_plus_uconst, 1, DW_OP_deref)
!8 = !DIExpression(DW_OP_plus, 1, DW_OP_deref)
; CHECK: !DIExpression(DW_OP_deref)
!9 = !DIExpression(DW_OP_deref)

16
llvm/test/Bitcode/DIExpression-minus-upgrade.ll Normal file
View File

@ -0,0 +1,16 @@
; RUN: llvm-dis -o - %s.bc | FileCheck %s
!llvm.dbg.cu = !{!1}
!llvm.module.flags = !{!8, !9}
!0 = distinct !DIGlobalVariable(name: "g", scope: !1, file: !2, line: 1, type: !5, isLocal: false, isDefinition: true)
!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, producer: "clang (llvm/trunk 304286)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !3, globals: !4)
!2 = !DIFile(filename: "a.c", directory: "/")
!3 = !{}
!4 = !{!7}
!5 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
; CHECK: !DIExpression(DW_OP_constu, 42, DW_OP_minus)
!6 = !DIExpression(DW_OP_minus, 42)
!7 = !DIGlobalVariableExpression(var: !0, expr: !6)
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 2, !"Debug Info Version", i32 3}

BIN
llvm/test/Bitcode/DIExpression-minus-upgrade.ll.bc Normal file
View File

Binary file not shown.

2
llvm/test/Bitcode/DIGlobalVariableExpression.ll
View File

@ -14,7 +14,7 @@
; CHECK: ![[HVAR:[0-9]+]] = distinct !DIGlobalVariable(name: "h",
; CHECK: ![[IMPORTS]] = !{![[CIMPORT:[0-9]+]]}
; CHECK: ![[CIMPORT]] = !DIImportedEntity({{.*}}entity: ![[HVAR]]
; CHECK: ![[GEXPR]] = !DIExpression(DW_OP_plus, 1)
; CHECK: ![[GEXPR]] = !DIExpression(DW_OP_plus_uconst, 1)
; CHECK: ![[H]] = {{.*}}!DIGlobalVariableExpression(var: ![[HVAR]])
@g = common global i32 0, align 4, !dbg !0

6
llvm/test/CodeGen/ARM/debug-info-blocks.ll
View File

@ -273,6 +273,6 @@ define hidden void @foobar_func_block_invoke_0(i8* %.block_descriptor, %0* %load
!160 = !DIFile(filename: "header.h", directory: "/Volumes/Sandbox/llvm")
!161 = !{!"header2.h", !"/Volumes/Sandbox/llvm"}
!162 = !{i32 1, !"Debug Info Version", i32 3}
!163 = !DIExpression(DW_OP_plus, 20, DW_OP_deref, DW_OP_plus, 4, DW_OP_deref, DW_OP_plus, 24)
!164 = !DIExpression(DW_OP_deref, DW_OP_plus, 24)
!165 = !DIExpression(DW_OP_deref, DW_OP_plus, 28)
!163 = !DIExpression(DW_OP_plus_uconst, 20, DW_OP_deref, DW_OP_plus_uconst, 4, DW_OP_deref, DW_OP_plus_uconst, 24)
!164 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 24)
!165 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 28)

2
llvm/test/CodeGen/X86/lea-opt-with-debug.mir
View File

@ -49,7 +49,7 @@
!5 = !{i32 2, !"Dwarf Version", i32 4}
!6 = !{i32 2, !"Debug Info Version", i32 3}
!7 = !{i32 1, !"PIC Level", i32 2}
!8 = !DIExpression(DW_OP_plus, 8, DW_OP_stack_value)
!8 = !DIExpression(DW_OP_plus_uconst, 8, DW_OP_stack_value)
!9 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 7, type: !10, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: true, unit: !0, variables: !11)
!10 = !DISubroutineType(types: !3)
!11 = !{!12}

4
llvm/test/DebugInfo/Generic/block-asan.ll
View File

@ -13,7 +13,7 @@
; Check that the location of the ASAN instrumented __block variable is
; correct.
; CHECK: !DIExpression(DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24)
; CHECK: !DIExpression(DW_OP_plus_uconst, 8, DW_OP_deref, DW_OP_plus_uconst, 24)
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
@ -79,7 +79,7 @@ attributes #3 = { nounwind }
!19 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!20 = !DIDerivedType(tag: DW_TAG_member, name: "__size", size: 32, align: 32, offset: 160, file: !1, scope: !5, baseType: !19)
!21 = !DIDerivedType(tag: DW_TAG_member, name: "x", size: 32, align: 32, offset: 192, file: !1, scope: !5, baseType: !19)
!22 = !DIExpression(DW_OP_plus, 8, DW_OP_deref, DW_OP_plus, 24)
!22 = !DIExpression(DW_OP_plus_uconst, 8, DW_OP_deref, DW_OP_plus_uconst, 24)
!23 = !DILocation(line: 4, column: 15, scope: !4)
!24 = !DILocation(line: 4, column: 3, scope: !4)
!25 = !DILocation(line: 5, column: 3, scope: !4)

2
llvm/test/DebugInfo/MIR/ARM/split-superreg-complex.mir
View File

@ -57,7 +57,7 @@
!17 = !{!18}
!18 = !DISubrange(count: 4)
!19 = !DILocation(line: 4, column: 13, scope: !9)
!20 = !DIExpression(DW_OP_plus, 1, DW_OP_minus, 1)
!20 = !DIExpression(DW_OP_plus_uconst, 1, DW_OP_constu, 1, DW_OP_minus)
!21 = !DILocation(line: 4, column: 7, scope: !9)
!22 = !DILocation(line: 5, column: 9, scope: !9)
!23 = !DILocation(line: 5, column: 18, scope: !9)

2
llvm/test/DebugInfo/X86/block-capture.ll
View File

@ -123,7 +123,7 @@ attributes #3 = { nounwind }
!66 = !DILocation(line: 2, column: 20, scope: !8)
!67 = !DILocation(line: 2, column: 21, scope: !8)
!68 = !DILocalVariable(name: "block", line: 2, scope: !8, file: !5, type: !25)
!69 = !DIExpression(DW_OP_deref, DW_OP_plus, 32)
!69 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 32)
!70 = !DILocation(line: 2, column: 9, scope: !8)
!71 = !DILocation(line: 2, column: 23, scope: !72)
!72 = distinct !DILexicalBlock(line: 2, column: 21, file: !1, scope: !8)

4
llvm/test/DebugInfo/X86/debug-info-block-captured-self.ll
View File

@ -107,5 +107,5 @@ define internal void @"__24-[Main initWithContext:]_block_invoke_2"(i8* %.block_
!106 = !DILocation(line: 40, scope: !42)
!107 = !DIFile(filename: "llvm/tools/clang/test/CodeGenObjC/debug-info-block-captured-self.m", directory: "")
!108 = !{i32 1, !"Debug Info Version", i32 3}
!109 = !DIExpression(DW_OP_plus, 32, DW_OP_deref)
!110 = !DIExpression(DW_OP_plus, 32, DW_OP_deref)
!109 = !DIExpression(DW_OP_plus_uconst, 32, DW_OP_deref)
!110 = !DIExpression(DW_OP_plus_uconst, 32, DW_OP_deref)

2
llvm/test/DebugInfo/X86/debug-info-blocks.ll
View File

@ -380,4 +380,4 @@ attributes #3 = { nounwind }
!108 = !DILocation(line: 61, scope: !36)
!109 = !DILocation(line: 62, scope: !36)
!110 = !{i32 1, !"Debug Info Version", i32 3}
!111 = !DIExpression(DW_OP_deref, DW_OP_plus, 32)
!111 = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 32)

4
llvm/test/DebugInfo/X86/dw_op_minus.ll
View File

@ -10,7 +10,7 @@
; Capture(buf);
; }
; }
; The interesting part is !DIExpression(DW_OP_minus, 400)
; The interesting part is !DIExpression(DW_OP_constu, 400, DW_OP_minus)
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@ -56,7 +56,7 @@ declare void @Capture(i32*)
!14 = !{i32 2, !"Debug Info Version", i32 3}
!15 = !{!"clang version 3.8.0 (trunk 248518) (llvm/trunk 248512)"}
!16 = !DILocation(line: 5, column: 3, scope: !4)
!17 = !DIExpression(DW_OP_minus, 400)
!17 = !DIExpression(DW_OP_constu, 400, DW_OP_minus)
!18 = !DILocation(line: 5, column: 7, scope: !4)
!19 = !DILocation(line: 6, column: 11, scope: !4)
!20 = !DILocation(line: 6, column: 3, scope: !4)

2
llvm/test/DebugInfo/X86/dw_op_minus_direct.ll
View File

@ -51,7 +51,7 @@ attributes #1 = { nounwind readnone }
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{!12}
!12 = !DILocalVariable(name: "i", arg: 1, scope: !7, file: !1, line: 1, type: !10)
!13 = !DIExpression(DW_OP_minus, 1, DW_OP_stack_value)
!13 = !DIExpression(DW_OP_constu, 1, DW_OP_minus, DW_OP_stack_value)
!14 = !DILocation(line: 1, column: 13, scope: !7)
!15 = !DILocation(line: 2, column: 11, scope: !7)
!16 = !DILocation(line: 2, column: 3, scope: !7)

4
llvm/test/DebugInfo/X86/safestack-byval.ll
View File

@ -14,7 +14,7 @@
; }
; CHECK: ![[ZZZ:.*]] = !DILocalVariable(name: "zzz",
; CHECK: ![[ZZZ_EXPR:.*]] = !DIExpression(DW_OP_deref, DW_OP_minus, 400)
; CHECK: ![[ZZZ_EXPR:.*]] = !DIExpression(DW_OP_deref, DW_OP_constu, 400, DW_OP_minus)
; CHECK: DBG_VALUE {{.*}} ![[ZZZ]], ![[ZZZ_EXPR]]
%struct.S = type { [100 x i32] }
@ -79,7 +79,7 @@ attributes #2 = { argmemonly nounwind }
!20 = !{i32 2, !"Debug Info Version", i32 3}
!21 = !{!"clang version 3.8.0 (trunk 254107) (llvm/trunk 254109)"}
!22 = !DILocation(line: 8, column: 9, scope: !12)
!23 = !DIExpression(DW_OP_deref, DW_OP_minus, 400)
!23 = !DIExpression(DW_OP_deref, DW_OP_constu, 400, DW_OP_minus)
!24 = !DILocation(line: 8, column: 28, scope: !12)
!25 = !DIExpression()
!26 = !DILocation(line: 9, column: 10, scope: !12)

2
llvm/test/DebugInfo/X86/stack-value-dwarf2.ll
View File

@ -93,4 +93,4 @@ attributes #1 = { nounwind readnone }
!15 = !DISubprogram(name: "<(lambda at test.ii:87:58)>", scope: !0, file: !1, line: 27, type: !6, isLocal: false, isDefinition: false, scopeLine: 27, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: true, templateParams: !2)
!16 = distinct !DILocation(line: 99, column: 21, scope: !17)
!17 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 2)
!18 = !DIExpression(DW_OP_plus, 4, DW_OP_stack_value, DW_OP_LLVM_fragment, 64, 32)
!18 = !DIExpression(DW_OP_plus_uconst, 4, DW_OP_stack_value, DW_OP_LLVM_fragment, 64, 32)

2
llvm/test/DebugInfo/X86/unattached-global.ll
View File

@ -12,7 +12,7 @@ target triple = "x86_64-unknown-linux-gnu"
!1 = !{!2}
!2 = !DIGlobalVariableExpression(var: !3, expr: !4)
!3 = distinct !DIGlobalVariable(name: "a", scope: null, isLocal: false, isDefinition: true, type: !6)
!4 = !DIExpression(DW_OP_plus, 4)
!4 = !DIExpression(DW_OP_plus_uconst, 4)
!5 = !DIFile(filename: "<stdin>", directory: "/")
!6 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)

2
llvm/test/Transforms/GlobalMerge/debug-info.ll
View File

@ -17,7 +17,7 @@ define void @use1() {
; CHECK: [[AVAR]] = !DIGlobalVariable(name: "a", scope: null, isLocal: false, isDefinition: true)
; CHECK: [[B]] = !DIGlobalVariableExpression(var: [[BVAR:![0-9]+]], expr: [[EXPR:![0-9]+]])
; CHECK: [[BVAR]] = !DIGlobalVariable(name: "b", scope: null, isLocal: false, isDefinition: true)
; CHECK: [[EXPR]] = !DIExpression(DW_OP_plus, 4)
; CHECK: [[EXPR]] = !DIExpression(DW_OP_plus_uconst, 4)
!llvm.module.flags = !{!4, !5}

12
llvm/test/Transforms/InstCombine/debuginfo-dce.ll
View File

@ -93,12 +93,12 @@ entry:
ret void, !dbg !32
}
; CHECK: ![[LOAD_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_plus, 0)
; CHECK: ![[BITCAST_EXPR]] = !DIExpression(DW_OP_plus, 0)
; CHECK: ![[GEP0_EXPR]] = !DIExpression(DW_OP_minus, 8, DW_OP_plus, 0, DW_OP_stack_value)
; CHECK: ![[GEP1_EXPR]] = !DIExpression(DW_OP_minus, 8, DW_OP_stack_value,
; CHECK: ![[LOAD_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_plus_uconst, 0)
; CHECK: ![[BITCAST_EXPR]] = !DIExpression(DW_OP_plus_uconst, 0)
; CHECK: ![[GEP0_EXPR]] = !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_plus_uconst, 0, DW_OP_stack_value)
; CHECK: ![[GEP1_EXPR]] = !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value,
; CHECK-SAME: DW_OP_LLVM_fragment, 0, 32)
; CHECK: ![[GEP2_EXPR]] = !DIExpression(DW_OP_minus, 8, DW_OP_stack_value)
; CHECK: ![[GEP2_EXPR]] = !DIExpression(DW_OP_constu, 8, DW_OP_minus, DW_OP_stack_value)
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
@ -130,7 +130,7 @@ attributes #1 = { nounwind readnone }
!17 = !{!18}
!18 = !DILocalVariable(name: "entry", scope: !14, file: !1, line: 6, type: !4)
!19 = !DILocation(line: 6, column: 17, scope: !14)
!20 = !DIExpression(DW_OP_plus, 0)
!20 = !DIExpression(DW_OP_plus_uconst, 0)
!21 = !DILocation(line: 11, column: 1, scope: !14)
!22 = distinct !DISubprogram(name: "scan", scope: !1, file: !1, line: 4, type: !15, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !17)
!23 = !DILocation(line: 6, column: 17, scope: !22)

4
llvm/test/Transforms/SafeStack/X86/debug-loc.ll
View File

@ -37,10 +37,10 @@ entry:
; CHECK-DAG: ![[VAR_ARG]] = !DILocalVariable(name: "zzz"
; 100 aligned up to 8
; CHECK-DAG: ![[EXPR_ARG]] = !DIExpression(DW_OP_minus, 104)
; CHECK-DAG: ![[EXPR_ARG]] = !DIExpression(DW_OP_constu, 104, DW_OP_minus
; CHECK-DAG: ![[VAR_LOCAL]] = !DILocalVariable(name: "xxx"
; CHECK-DAG: ![[EXPR_LOCAL]] = !DIExpression(DW_OP_minus, 208)
; CHECK-DAG: ![[EXPR_LOCAL]] = !DIExpression(DW_OP_constu, 208, DW_OP_minus
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1

6
llvm/test/Transforms/SafeStack/X86/debug-loc2.ll
View File

@ -84,8 +84,8 @@ attributes #4 = { nounwind }
!13 = !DILocation(line: 5, column: 3, scope: !6)
!14 = !DILocation(line: 6, column: 3, scope: !6)
; CHECK-DAG: ![[X1_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_minus, 4)
; CHECK-DAG: ![[X2_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_minus, 8)
; CHECK-DAG: ![[X1_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_constu, 4, DW_OP_minus)
; CHECK-DAG: ![[X2_EXPR]] = !DIExpression(DW_OP_deref, DW_OP_constu, 8, DW_OP_minus)
!15 = !DIExpression(DW_OP_deref)
!16 = !DILocation(line: 5, column: 7, scope: !6)
!17 = !DILocation(line: 8, column: 3, scope: !6)
@ -95,4 +95,4 @@ attributes #4 = { nounwind }
!21 = !DILocation(line: 10, column: 1, scope: !22)
!22 = !DILexicalBlockFile(scope: !6, file: !1, discriminator: 1)
!23 = !DIExpression()
!24 = !DIExpression(DW_OP_minus, 42)
!24 = !DIExpression(DW_OP_constu, 42, DW_OP_minus)

12
llvm/unittests/IR/MetadataTest.cpp
View File

@ -2042,23 +2042,23 @@ TEST_F(DIExpressionTest, isValid) {
EXPECT_TRUE(DIExpression::get(Context, None));
// Valid constructions.
EXPECT_VALID(dwarf::DW_OP_plus, 6);
EXPECT_VALID(dwarf::DW_OP_plus_uconst, 6);
EXPECT_VALID(dwarf::DW_OP_constu, 6, dwarf::DW_OP_plus);
EXPECT_VALID(dwarf::DW_OP_deref);
EXPECT_VALID(dwarf::DW_OP_LLVM_fragment, 3, 7);
EXPECT_VALID(dwarf::DW_OP_plus, 6, dwarf::DW_OP_deref);
EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus, 6);
EXPECT_VALID(dwarf::DW_OP_plus_uconst, 6, dwarf::DW_OP_deref);
EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus_uconst, 6);
EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_LLVM_fragment, 3, 7);
EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus, 6,
EXPECT_VALID(dwarf::DW_OP_deref, dwarf::DW_OP_plus_uconst, 6,
dwarf::DW_OP_LLVM_fragment, 3, 7);
// Invalid constructions.
EXPECT_INVALID(~0u);
EXPECT_INVALID(dwarf::DW_OP_plus);
EXPECT_INVALID(dwarf::DW_OP_plus, 0);
EXPECT_INVALID(dwarf::DW_OP_plus_uconst);
EXPECT_INVALID(dwarf::DW_OP_LLVM_fragment);
EXPECT_INVALID(dwarf::DW_OP_LLVM_fragment, 3);
EXPECT_INVALID(dwarf::DW_OP_LLVM_fragment, 3, 7, dwarf::DW_OP_plus, 3);
EXPECT_INVALID(dwarf::DW_OP_LLVM_fragment, 3, 7, dwarf::DW_OP_plus_uconst, 3);
EXPECT_INVALID(dwarf::DW_OP_LLVM_fragment, 3, 7, dwarf::DW_OP_deref);
#undef EXPECT_VALID