Alexey Samsonov f4a702c079 Generate better location ranges for some register-described variables. ... Don't terminate location ranges for register-described variables at the end of machine basic block if this register is never modified in the function body, except for the prologue and epilogue. Prologue location is guessed by FrameSetup flags on MachineInstructions, while epilogue location is deduced from debug locations of instructions in the basic blocks ending with return instructions. This patch is mostly targeted to fix non-trivial debug locations for variables addressed via stack and frame pointers. It is not really a generic fix. We can still produce poor debug info for register-described variables if this register *is* modified somewhere in the function, but in unrelated places. This might be the case for the debug info in optimized binaries (e.g. for local variables in inlined functions). LiveDebugVariables pass in CodeGen attempts to fix this problem by adjusting DBG_VALUE instructions, but this pass is tied to greedy register allocator, which is used in optimized builds only. Proper fix would likely involve generalizing LiveDebugVariables to all register allocators. See more discussion in http://reviews.llvm.org/D3933 review thread. I'm proceeding with this patch to fix immediate severe problems and important cases, e.g. fix completely broken debug info with AddressSanitizer and fix PR19307 (missing debug info for by-value std::string arguments). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210492 91177308-0d34-0410-b5e6-96231b3b80d8		2014-06-09 21:53:47 +00:00
..
AArch64	Generate better location ranges for some register-described variables.	2014-06-09 21:53:47 +00:00
ARM	ARM: Enable use of relocation type tlsldo in debug info for tls data.	2014-02-05 07:23:09 +00:00
COFF	MC: honour IMAGE_SCN_CNT_INITIALIZED_DATA	2014-04-23 21:29:34 +00:00
Inputs	[llvm-symbolizer] Print file/line for a PC even if there is no DIE describing it.	2014-04-18 22:22:44 +00:00
Mips	CodeGen: Make MachineBasicBlock::back skip to the beginning of the last bundle.	2014-05-24 13:13:17 +00:00
PowerPC	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
Sparc	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
SystemZ	DebugInfo: Generalize some tests to handle variations in attribute ordering.	2014-05-23 21:11:46 +00:00
X86	Generate better location ranges for some register-described variables.	2014-06-09 21:53:47 +00:00
2009-10-16-Phi.ll
2009-11-03-InsertExtractValue.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2009-11-05-DeadGlobalVariable.ll	DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals.	2014-05-14 21:52:46 +00:00
2009-11-06-NamelessGlobalVariable.ll	DebugInfo: Assert that a CU's subprogram list contains only subprograms.	2014-05-14 21:52:37 +00:00
2009-11-10-CurrentFn.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
2010-01-05-DbgScope.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2010-01-19-DbgScope.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2010-03-12-llc-crash.ll	Debug Info: add an identifier field to DICompositeType.	2013-08-26 22:39:55 +00:00
2010-03-19-DbgDeclare.ll	No need for those tests to go thru llvm-as and/or llvm-dis.	2014-05-27 22:03:28 +00:00
2010-03-24-MemberFn.ll	Reland r200340 - 'Add line table debug info to COFF files when using a win32 triple'	2014-01-30 01:39:17 +00:00
2010-03-30-InvalidDbgInfoCrash.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2010-04-06-NestedFnDbgInfo.ll	DebugInfo: Lazily attach definition attributes to definitions.	2014-05-27 18:37:43 +00:00
2010-04-19-FramePtr.ll	Reland r200340 - 'Add line table debug info to COFF files when using a win32 triple'	2014-01-30 01:39:17 +00:00
2010-05-03-DisableFramePtr.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2010-05-03-OriginDIE.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
2010-05-10-MultipleCU.ll	Reland r200340 - 'Add line table debug info to COFF files when using a win32 triple'	2014-01-30 01:39:17 +00:00
2010-06-29-InlinedFnLocalVar.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
2010-07-19-Crash.ll	DebugInfo: Assume the CU's Subprogram list only contains definitions.	2014-05-16 18:26:53 +00:00
2010-10-01-crash.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
arm-relocs.test	Add support for the R_ARM_ABS32 relocation.	2014-04-03 02:27:00 +00:00
array.ll	Reland r200340 - 'Add line table debug info to COFF files when using a win32 triple'	2014-01-30 01:39:17 +00:00
bug_null_debuginfo.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
constant-pointers.ll	PR19767: DebugInfo emission of pointer constants.	2014-05-20 18:21:51 +00:00
cross-cu-inlining.ll	DebugInfo: Create abstract function definitions even when concrete definitions preceed inline definitions.	2014-05-27 18:37:55 +00:00
cross-cu-linkonce.ll	DebugInfo: Test linkonce-odr functions under LTO.	2014-05-26 06:44:52 +00:00
cu-line-tables.ll	DebugInfo: Make gmlt debug info more gmlt-like by removing variables.	2014-05-12 21:33:03 +00:00
cu-range-hole.ll	Reapply DW_AT_low/high_pc patch:	2014-03-20 19:16:16 +00:00
cu-ranges.ll	Reapply DW_AT_low/high_pc patch:	2014-03-20 19:16:16 +00:00
dead-argument-order.ll	PR19388: DebugInfo: Emit dead arguments in their originally declared order.	2014-06-05 00:51:35 +00:00
debug-info-qualifiers.ll	DebugInfo: Lazily construct subprogram definition DIEs.	2014-05-27 18:37:48 +00:00
debuginfofinder-multiple-cu.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
debuglineinfo.test	Add DIContext::getLineInfoForAddressRange() function and test. This function allows a caller to obtain a table of line information for a function using the function's address and size.	2013-01-26 00:28:05 +00:00
dwarf-public-names.ll	DebugInfo: Use the scope of the function declaration, if any, to name a function in DWARF pubnames	2014-06-06 22:29:05 +00:00
dwarfdump-debug-frame-simple.test	Previously, parsing capability of the .debug_frame section was added	2013-02-21 22:53:19 +00:00
dwarfdump-debug-loc-simple.test	Spell correct (s/begining/beginning/)	2013-06-19 21:42:05 +00:00
dwarfdump-dump-flags.test	Add command-line flags for DWARF dumping.	2013-01-25 20:26:43 +00:00
dwarfdump-line-dwo.test	llvm-dwarfdump: Support for debug_line.dwo section for file names for type units under fission.	2014-02-24 23:58:54 +00:00
dwarfdump-pubnames.test	DebugInfo: Make pubnames header printing similar to unit header printing	2013-11-01 17:53:30 +00:00
dwarfdump-ranges.test	Kill symbolization functionality in llvm-dwarfdump. We have llvm-symbolizer for that.	2014-05-19 18:45:32 +00:00
dwarfdump-type-units.test	llvm-dwarfdump: support for emitting only the debug_types section using -debug-dump	2013-11-19 00:29:42 +00:00
dwarfdump-zlib.test	Kill symbolization functionality in llvm-dwarfdump. We have llvm-symbolizer for that.	2014-05-19 18:45:32 +00:00
empty.ll	DebugInfo: Add fission-related sections to COFF	2014-03-26 03:05:10 +00:00
enum.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
global.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
incorrect-variable-debugloc.ll	DebugInfo: Assert that DbgVariables have associated DIEs	2014-06-01 03:38:13 +00:00
inheritance.ll	Debug Info Testing: update context from empty string to null.	2013-09-08 03:11:54 +00:00
inline-debug-info-multiret.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
inline-debug-info.ll	Debug Info: update testing cases to specify the debug info version number.	2013-11-22 21:49:45 +00:00
inline-no-debug-info.ll	Fix line numbers for code inlined from __nodebug__ functions.	2014-06-09 09:09:19 +00:00
inline-scopes.ll	DebugInfo: Fix inlining with #file directives a little harder	2014-05-25 18:11:35 +00:00
inlined-arguments.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
inlined-vars.ll	DwarfDebug: Avoid an extra map lookup while constructing abstract scope DIEs and reduce nesting/conditionals.	2014-05-12 18:23:35 +00:00
llvm-symbolizer-zlib.test	Kill symbolization functionality in llvm-dwarfdump. We have llvm-symbolizer for that.	2014-05-19 18:45:32 +00:00
llvm-symbolizer.test	Kill symbolization functionality in llvm-dwarfdump. We have llvm-symbolizer for that.	2014-05-19 18:45:32 +00:00
lto-comp-dir.ll	Add comments from Eric's review of r204094.	2014-03-20 17:05:45 +00:00
member-order.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
member-pointers.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
missing-abstract-variable.ll	XFAIL: test/DebugInfo/missing-abstract-variable.ll on s390x as well	2014-06-05 14:20:54 +00:00
namespace_function_definition.ll	DebugInfo: Lazily attach definition attributes to definitions.	2014-05-27 18:37:43 +00:00
namespace_inline_function_definition.ll	DebugInfo: Put concrete definitions referencing abstract definitions in the same scope as the abstract definition.	2014-05-23 20:25:15 +00:00
namespace.ll	DebugInfo: Lazily construct subprogram definition DIEs.	2014-05-27 18:37:48 +00:00
restrict.ll	PR13337: Omit DW_TAG_restrict_type when compiling for DWARF2	2014-04-12 05:35:59 +00:00
sugared-constants.ll	DebugInfo: Handle emitting constants of C++ unicode character type.	2014-05-16 21:53:09 +00:00
template-recursive-void.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
tu-composite.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
tu-member-pointer.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00
two-cus-from-same-file.ll	DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals.	2014-05-14 21:52:46 +00:00
typedef.ll	DebugInfo: Correct the attribute type kind.	2014-05-01 18:31:21 +00:00
unconditional-branch.ll	X86MCAsmInfoGNUCOFF: Set PointerSize as 8 for targeting x64. It caused DW_LNE_set_address was misemitted on x64.	2014-04-08 15:28:50 +00:00
varargs.ll	DebugInfo: Lazily construct subprogram definition DIEs.	2014-05-27 18:37:48 +00:00
version.ll	DebugInfo: Remove some unneeded conditionals now that DIBuilder no longer emits zero-length arrays as {i32 0}	2014-02-04 01:23:52 +00:00