Greg Clayton 6f6e4dbd5d Improve DWARF parsing speed by improving DWARFAbbreviationDeclaration ... This patch gets a DWARF parsing speed improvement by having DWARFAbbreviationDeclaration instances know if they have a fixed byte size. If an abbreviation has a fixed byte size that can be calculated given a DWARFUnit, then parsing a DIE becomes two steps: parse ULEB128 abbrev code, and then add constant size to the offset. This patch also adds a fixed byte size to each DWARFAbbreviationDeclaration::AttributeSpec so that attributes can quickly skip their values if needed without the need to lookup the fixed for size. Notable improvements: - DWARFAbbreviationDeclaration::findAttributeIndex() now returns an Optional<uint32_t> instead of a uint32_t and we no longer have to look for the magic -1U return value - Optional<uint32_t> DWARFAbbreviationDeclaration::findAttributeIndex(dwarf::Attribute attr) const; - DWARFAbbreviationDeclaration now has a getAttributeValue() function that extracts an attribute value given a DIE offset that takes advantage of the DWARFAbbreviationDeclaration::AttributeSpec::ByteSize - bool DWARFAbbreviationDeclaration::getAttributeValue(const uint32_t DIEOffset, const dwarf::Attribute Attr, const DWARFUnit &U, DWARFFormValue &FormValue) const; - A DWARFAbbreviationDeclaration instance can return a fixed byte size for itself so DWARF parsing is faster: - Optional<size_t> DWARFAbbreviationDeclaration::getFixedAttributesByteSize(const DWARFUnit &U) const; - Any functions that used to take a "const DWARFUnit *U" that would crash if U was NULL now take a "const DWARFUnit &U" and are only called with a valid DWARFUnit Differential Revision: https://reviews.llvm.org/D26567 llvm-svn: 286924		2016-11-15 01:23:06 +00:00
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CMakeLists.txt	Revert r282238 "Revert r282235 "[llvm-dwarfdump] - Teach dwarfdump to dump gdb-index section.""	2016-09-23 11:01:53 +00:00
DWARFAbbreviationDeclaration.cpp	Improve DWARF parsing speed by improving DWARFAbbreviationDeclaration	2016-11-15 01:23:06 +00:00
DWARFAcceleratorTable.cpp	Modify DWARFFormValue to remember the DWARFUnit that it was decoded with.	2016-10-31 16:46:02 +00:00
DWARFCompileUnit.cpp	[DWARF parser] Make DWARF parser more robust against missing compile/type units.	2015-05-19 21:54:32 +00:00
DWARFContext.cpp	dwarfdump: -summarize-types: print a short summary (unqualified type name, hash, length) of type units rather than dumping contents	2016-10-18 21:09:48 +00:00
DWARFDebugAbbrev.cpp	…
DWARFDebugArangeSet.cpp	…
DWARFDebugAranges.cpp	…
DWARFDebugFrame.cpp	Re-commit "Use StringRef in Support/Darf APIs (NFC)"	2016-10-05 05:59:29 +00:00
DWARFDebugInfoEntry.cpp	Improve DWARF parsing speed by improving DWARFAbbreviationDeclaration	2016-11-15 01:23:06 +00:00
DWARFDebugLine.cpp	Re-commit "Use StringRef in Support/Darf APIs (NFC)"	2016-10-05 05:59:29 +00:00
DWARFDebugLoc.cpp	Import/update constants from the DWARF 5 public review draft document.	2016-10-28 17:59:50 +00:00
DWARFDebugMacro.cpp	[NFC] Header cleanup	2016-04-18 09:17:29 +00:00
DWARFDebugRangeList.cpp	…
DWARFFormValue.cpp	Fixed issues found by Paul Robinson with my patch for:	2016-11-11 17:38:14 +00:00
DWARFGdbIndex.cpp	Revert r282238 "Revert r282235 "[llvm-dwarfdump] - Teach dwarfdump to dump gdb-index section.""	2016-09-23 11:01:53 +00:00
DWARFTypeUnit.cpp	Modify DWARFFormValue to remember the DWARFUnit that it was decoded with.	2016-10-31 16:46:02 +00:00
DWARFUnit.cpp	Improve DWARF parsing speed by improving DWARFAbbreviationDeclaration	2016-11-15 01:23:06 +00:00
DWARFUnitIndex.cpp	dwarfdump: Correctly indentify the indicies for DWP records	2015-12-03 18:41:59 +00:00
LLVMBuild.txt	…
SyntaxHighlighting.cpp	dwarfdump: Added macro support to llvm-dwarfdump tool.	2015-11-12 09:38:54 +00:00
SyntaxHighlighting.h	dwarfdump: Added macro support to llvm-dwarfdump tool.	2015-11-12 09:38:54 +00:00