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| author | Fangrui Song <i@maskray.me> | 2020-11-09 10:19:12 -0800 |
|---|---|---|
| committer | Fangrui Song <i@maskray.me> | 2020-11-09 10:19:12 -0800 |
| commit | 2c481f128cad043498dc404bc7f6d6128bb7c223 (patch) | |
| tree | 69407044c66c0d57322f1e93b690597dcb7cb57c /libunwind | |
| parent | c8cd7e2bbf7e124ed09da2b27e09dd30e3562e46 (diff) | |
| download | llvm-2c481f128cad043498dc404bc7f6d6128bb7c223.zip llvm-2c481f128cad043498dc404bc7f6d6128bb7c223.tar.gz llvm-2c481f128cad043498dc404bc7f6d6128bb7c223.tar.bz2 | |
[libunwind] Delete unused codeOffsetAtStackDecrement/registersInOtherRegisters/sameValueUsed
ld64 uses them to create compact unwind from DWARF call frame information.
When the code was ported to libunwind, the variables were not deleted.
Reviewed By: #libunwind, compnerd
Differential Revision: https://reviews.llvm.org/D91039
Diffstat (limited to 'libunwind')
| -rw-r--r-- | libunwind/src/DwarfParser.hpp | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/libunwind/src/DwarfParser.hpp b/libunwind/src/DwarfParser.hpp index 4bfd045..de0eb6d 100644 --- a/libunwind/src/DwarfParser.hpp +++ b/libunwind/src/DwarfParser.hpp @@ -88,9 +88,6 @@ public: int32_t cfaRegisterOffset; // CFA = (cfaRegister)+cfaRegisterOffset int64_t cfaExpression; // CFA = expression uint32_t spExtraArgSize; - uint32_t codeOffsetAtStackDecrement; - bool registersInOtherRegisters; - bool sameValueUsed; RegisterLocation savedRegisters[kMaxRegisterNumber + 1]; enum class InitializeTime { kLazy, kNormal }; @@ -521,8 +518,6 @@ bool CFI_Parser<A>::parseFDEInstructions(A &addressSpace, // value has not changed, so no need to restore from frame. // We model this as if the register was never saved. results->setRegisterLocation(reg, kRegisterUnused, initialState); - // set flag to disable conversion to compact unwind - results->sameValueUsed = true; _LIBUNWIND_TRACE_DWARF("DW_CFA_same_value(reg=%" PRIu64 ")\n", reg); break; case DW_CFA_register: @@ -540,8 +535,6 @@ bool CFI_Parser<A>::parseFDEInstructions(A &addressSpace, } results->setRegister(reg, kRegisterInRegister, (int64_t)reg2, initialState); - // set flag to disable conversion to compact unwind - results->registersInOtherRegisters = true; _LIBUNWIND_TRACE_DWARF( "DW_CFA_register(reg=%" PRIu64 ", reg2=%" PRIu64 ")\n", reg, reg2); break; @@ -598,7 +591,6 @@ bool CFI_Parser<A>::parseFDEInstructions(A &addressSpace, case DW_CFA_def_cfa_offset: results->cfaRegisterOffset = (int32_t)addressSpace.getULEB128(p, instructionsEnd); - results->codeOffsetAtStackDecrement = (uint32_t)codeOffset; _LIBUNWIND_TRACE_DWARF("DW_CFA_def_cfa_offset(%d)\n", results->cfaRegisterOffset); break; @@ -662,7 +654,6 @@ bool CFI_Parser<A>::parseFDEInstructions(A &addressSpace, results->cfaRegisterOffset = (int32_t)(addressSpace.getSLEB128(p, instructionsEnd) * cieInfo.dataAlignFactor); - results->codeOffsetAtStackDecrement = (uint32_t)codeOffset; _LIBUNWIND_TRACE_DWARF("DW_CFA_def_cfa_offset_sf(%d)\n", results->cfaRegisterOffset); break; |