mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
48bac26038
LowerDbgDeclare inserts a dbg.value before each use of an address described by a dbg.declare. When inserting a dbg.value before a CallInst use, however, it fails to append DW_OP_deref to the DIExpression. The DW_OP_deref is needed to reflect the fact that a dbg.value describes a source variable directly (as opposed to a dbg.declare, which relies on pointer indirection). This patch adds in the DW_OP_deref where needed. This results in the correct values being shown during a debug session for a program compiled with ASan and optimizations (see https://reviews.llvm.org/D49520). Note that ConvertDebugDeclareToDebugValue is already correct -- no changes there were needed. One complication is that SelectionDAG is unable to distinguish between direct and indirect frame-index (FRAMEIX) SDDbgValues. This patch also fixes this long-standing issue in order to not regress integration tests relying on the incorrect assumption that all frame-index SDDbgValues are indirect. This is a necessary fix: the newly-added DW_OP_derefs cannot be lowered properly otherwise. Basically the fix prevents a direct SDDbgValue with DIExpression(DW_OP_deref) from being dereferenced twice by a debugger. There were a handful of tests relying on this incorrect "FRAMEIX => indirect" assumption which actually had incorrect DW_AT_locations: these are all fixed up in this patch. Testing: - check-llvm, and an end-to-end test using lldb to debug an optimized program. - Existing unit tests for DIExpression::appendToStack fully cover the new DIExpression::append utility. - check-debuginfo (the debug info integration tests) Differential Revision: https://reviews.llvm.org/D49454 llvm-svn: 338069 |
||
|---|---|---|
| .. | ||
| AsmWriter.cpp | ||
| AttributeImpl.h | ||
| Attributes.cpp | ||
| AttributesCompatFunc.td | ||
| AutoUpgrade.cpp | ||
| BasicBlock.cpp | ||
| CMakeLists.txt | ||
| Comdat.cpp | ||
| ConstantFold.cpp | ||
| ConstantFold.h | ||
| ConstantRange.cpp | ||
| Constants.cpp | ||
| ConstantsContext.h | ||
| Core.cpp | ||
| DataLayout.cpp | ||
| DebugInfo.cpp | ||
| DebugInfoMetadata.cpp | ||
| DebugLoc.cpp | ||
| DiagnosticHandler.cpp | ||
| DiagnosticInfo.cpp | ||
| DiagnosticPrinter.cpp | ||
| DIBuilder.cpp | ||
| Dominators.cpp | ||
| DomTreeUpdater.cpp | ||
| Function.cpp | ||
| Globals.cpp | ||
| GVMaterializer.cpp | ||
| InlineAsm.cpp | ||
| Instruction.cpp | ||
| Instructions.cpp | ||
| IntrinsicInst.cpp | ||
| IRBuilder.cpp | ||
| IRPrintingPasses.cpp | ||
| LegacyPassManager.cpp | ||
| LLVMBuild.txt | ||
| LLVMContext.cpp | ||
| LLVMContextImpl.cpp | ||
| LLVMContextImpl.h | ||
| Mangler.cpp | ||
| MDBuilder.cpp | ||
| Metadata.cpp | ||
| MetadataImpl.h | ||
| Module.cpp | ||
| ModuleSummaryIndex.cpp | ||
| Operator.cpp | ||
| OptBisect.cpp | ||
| Pass.cpp | ||
| PassManager.cpp | ||
| PassRegistry.cpp | ||
| ProfileSummary.cpp | ||
| SafepointIRVerifier.cpp | ||
| Statepoint.cpp | ||
| SymbolTableListTraitsImpl.h | ||
| Type.cpp | ||
| TypeFinder.cpp | ||
| Use.cpp | ||
| User.cpp | ||
| Value.cpp | ||
| ValueSymbolTable.cpp | ||
| Verifier.cpp | ||