[NFC] Add fragment-getting functions to DbgRecord #97705
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Patch [1/x] to fix structured bindings debug info in SROA. Copy getFragment and getFragmentOrEntireVariable from DbgVariableIntrinsic. Move FragmentInfo out of DIExpression and DebugInfoMetadata.h into a new file DbgVariableFragmentInfo.h so it can be included into DebugProgramInstruction.h without pulling in other includes and classes. These functions will be used in subsequent patches. Move FragmentInfo out of DIExpression
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@llvm/pr-subscribers-llvm-ir @llvm/pr-subscribers-debuginfo Author: Orlando Cazalet-Hyams (OCHyams) ChangesPatch [1/x] to fix structured bindings debug info in SROA. Copy getFragment and getFragmentOrEntireVariable from DbgVariableIntrinsic. Move FragmentInfo out of DIExpression and DebugInfoMetadata.h into a new file DbgVariableFragmentInfo.h so it can be included into DebugProgramInstruction.h without pulling in other includes and classes. These functions will be used in subsequent patches. Move FragmentInfo out of DIExpression Full diff: https://github.com/llvm/llvm-project/pull/97705.diff 4 Files Affected:
diff --git a/llvm/include/llvm/IR/DbgVariableFragmentInfo.h b/llvm/include/llvm/IR/DbgVariableFragmentInfo.h
new file mode 100644
index 0000000000000..40326d5792f9f
--- /dev/null
+++ b/llvm/include/llvm/IR/DbgVariableFragmentInfo.h
@@ -0,0 +1,45 @@
+//===- llvm/IR/DbgVariableFragmentInfo.h ------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Helper struct to describe a fragment of a debug variable.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_IR_DBGVARIABLEFRAGMENTINFO_H
+#define LLVM_IR_DBGVARIABLEFRAGMENTINFO_H
+
+#include <cstdint>
+
+namespace llvm {
+struct DbgVariableFragmentInfo {
+ DbgVariableFragmentInfo() = default;
+ DbgVariableFragmentInfo(uint64_t SizeInBits, uint64_t OffsetInBits)
+ : SizeInBits(SizeInBits), OffsetInBits(OffsetInBits) {}
+ uint64_t SizeInBits;
+ uint64_t OffsetInBits;
+ /// Return the index of the first bit of the fragment.
+ uint64_t startInBits() const { return OffsetInBits; }
+ /// Return the index of the bit after the end of the fragment, e.g. for
+ /// fragment offset=16 and size=32 return their sum, 48.
+ uint64_t endInBits() const { return OffsetInBits + SizeInBits; }
+
+ /// Returns a zero-sized fragment if A and B don't intersect.
+ static DbgVariableFragmentInfo intersect(DbgVariableFragmentInfo A,
+ DbgVariableFragmentInfo B) {
+ // Don't use std::max or min to avoid including <algorithm>.
+ uint64_t StartInBits =
+ A.OffsetInBits > B.OffsetInBits ? A.OffsetInBits : B.OffsetInBits;
+ uint64_t EndInBits =
+ A.endInBits() < B.endInBits() ? A.endInBits() : B.endInBits();
+ if (EndInBits <= StartInBits)
+ return {0, 0};
+ return DbgVariableFragmentInfo(EndInBits - StartInBits, StartInBits);
+ }
+};
+} // end namespace llvm
+
+#endif // LLVM_IR_DBGVARIABLEFRAGMENTINFO_H
diff --git a/llvm/include/llvm/IR/DebugInfoMetadata.h b/llvm/include/llvm/IR/DebugInfoMetadata.h
index 524945862e8d4..d953ce46efb30 100644
--- a/llvm/include/llvm/IR/DebugInfoMetadata.h
+++ b/llvm/include/llvm/IR/DebugInfoMetadata.h
@@ -21,6 +21,7 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/IR/Constants.h"
+#include "llvm/IR/DbgVariableFragmentInfo.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/PseudoProbe.h"
#include "llvm/Support/Casting.h"
@@ -2886,29 +2887,7 @@ class DIExpression : public MDNode {
/// Return whether there is exactly one operator and it is a DW_OP_deref;
bool isDeref() const;
- /// Holds the characteristics of one fragment of a larger variable.
- struct FragmentInfo {
- FragmentInfo() = default;
- FragmentInfo(uint64_t SizeInBits, uint64_t OffsetInBits)
- : SizeInBits(SizeInBits), OffsetInBits(OffsetInBits) {}
- uint64_t SizeInBits;
- uint64_t OffsetInBits;
- /// Return the index of the first bit of the fragment.
- uint64_t startInBits() const { return OffsetInBits; }
- /// Return the index of the bit after the end of the fragment, e.g. for
- /// fragment offset=16 and size=32 return their sum, 48.
- uint64_t endInBits() const { return OffsetInBits + SizeInBits; }
-
- /// Returns a zero-sized fragment if A and B don't intersect.
- static DIExpression::FragmentInfo intersect(DIExpression::FragmentInfo A,
- DIExpression::FragmentInfo B) {
- uint64_t StartInBits = std::max(A.OffsetInBits, B.OffsetInBits);
- uint64_t EndInBits = std::min(A.endInBits(), B.endInBits());
- if (EndInBits <= StartInBits)
- return {0, 0};
- return DIExpression::FragmentInfo(EndInBits - StartInBits, StartInBits);
- }
- };
+ using FragmentInfo = DbgVariableFragmentInfo;
/// Return the number of bits that have an active value, i.e. those that
/// aren't known to be zero/sign (depending on the type of Var) and which
diff --git a/llvm/include/llvm/IR/DebugProgramInstruction.h b/llvm/include/llvm/IR/DebugProgramInstruction.h
index ed8081a3cad19..fd93dd9b89f7c 100644
--- a/llvm/include/llvm/IR/DebugProgramInstruction.h
+++ b/llvm/include/llvm/IR/DebugProgramInstruction.h
@@ -50,6 +50,7 @@
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/iterator.h"
+#include "llvm/IR/DbgVariableFragmentInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/SymbolTableListTraits.h"
@@ -460,6 +461,19 @@ class DbgVariableRecord : public DbgRecord, protected DebugValueUser {
resetDebugValue(0, NewLocation);
}
+ std::optional<DbgVariableFragmentInfo> getFragment() const;
+ /// Get the FragmentInfo for the variable if it exists, otherwise return a
+ /// FragmentInfo that covers the entire variable if the variable size is
+ /// known, otherwise return a zero-sized fragment.
+ DbgVariableFragmentInfo getFragmentOrEntireVariable() const {
+ DbgVariableFragmentInfo VariableSlice(0, 0);
+ // Get the fragment or variable size, or zero.
+ if (auto Sz = getFragmentSizeInBits())
+ VariableSlice.SizeInBits = *Sz;
+ if (auto Frag = getFragment())
+ VariableSlice.OffsetInBits = Frag->OffsetInBits;
+ return VariableSlice;
+ }
/// Get the size (in bits) of the variable, or fragment of the variable that
/// is described.
std::optional<uint64_t> getFragmentSizeInBits() const;
diff --git a/llvm/lib/IR/DebugProgramInstruction.cpp b/llvm/lib/IR/DebugProgramInstruction.cpp
index 9a4926c81dca2..1711fd6943517 100644
--- a/llvm/lib/IR/DebugProgramInstruction.cpp
+++ b/llvm/lib/IR/DebugProgramInstruction.cpp
@@ -371,6 +371,10 @@ bool DbgVariableRecord::isKillLocation() const {
any_of(location_ops(), [](Value *V) { return isa<UndefValue>(V); });
}
+std::optional<DbgVariableFragmentInfo> DbgVariableRecord::getFragment() const {
+ return getExpression()->getFragmentInfo();
+}
+
std::optional<uint64_t> DbgVariableRecord::getFragmentSizeInBits() const {
if (auto Fragment = getExpression()->getFragmentInfo())
return Fragment->SizeInBits;
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This was referenced Jul 4, 2024
SLTozer
approved these changes
Jul 5, 2024
Co-authored-by: Stephen Tozer <[email protected]>
You can test this locally with the following command:git-clang-format --diff 32273ea22da6a65ed796b61c1e926649a28f9557 18addf43d6af023ccf1adbacbe02f72ddd7e3072 -- llvm/include/llvm/IR/DbgVariableFragmentInfo.h llvm/include/llvm/IR/DebugInfoMetadata.h llvm/include/llvm/IR/DebugProgramInstruction.h llvm/lib/IR/DebugProgramInstruction.cppView the diff from clang-format here.diff --git a/llvm/include/llvm/IR/DebugProgramInstruction.h b/llvm/include/llvm/IR/DebugProgramInstruction.h
index 734a637a4a..30c85bee46 100644
--- a/llvm/include/llvm/IR/DebugProgramInstruction.h
+++ b/llvm/include/llvm/IR/DebugProgramInstruction.h
@@ -467,7 +467,7 @@ public:
/// known, otherwise return a zero-sized fragment.
DbgVariableFragmentInfo getFragmentOrEntireVariable() const {
if (auto Frag = getFragment())
- return *Frag;
+ return *Frag;
if (auto Sz = getVariable()->getSizeInBits())
return {*Sz, 0};
return {0, 0};
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nikic
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Jul 8, 2024
This reverts commit f21b62b. Fails to build.
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Thanks @nikic for the revert |
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OCHyams
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Patch [1/x] to fix structured bindings debug info in SROA. Copy getFragment and getFragmentOrEntireVariable from DbgVariableIntrinsic. Move FragmentInfo out of DIExpression and DebugInfoMetadata.h into a new file DbgVariableFragmentInfo.h so it can be included into DebugProgramInstruction.h without pulling in other includes and classes.
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Patch [1/x] to fix structured bindings debug info in SROA.
Copy getFragment and getFragmentOrEntireVariable from DbgVariableIntrinsic.
Move FragmentInfo out of DIExpression and DebugInfoMetadata.h into a new file DbgVariableFragmentInfo.h so it can be included into DebugProgramInstruction.h without pulling in other includes and classes.
These functions will be used in subsequent patches.