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David Blaikie 029bd3350e Recommit r212203: Don't try to construct debug LexicalScopes hierarchy for functions that do not have top level debug information. 
Reverted by Eric Christopher (Thanks!) in r212203 after Bob Wilson
reported LTO issues. Duncan Exon Smith and Aditya Nandakumar helped
provide a reduced reproduction, though the failure wasn't too hard to
guess, and even easier with the example to confirm.

The assertion that the subprogram metadata associated with an
llvm::Function matches the scope data referenced by the DbgLocs on the
instructions in that function is not valid under LTO. In LTO, a C++
inline function might exist in multiple CUs and the subprogram metadata
nodes will refer to the same llvm::Function. In this case, depending on
the order of the CUs, the first intance of the subprogram metadata may
not be the one referenced by the instructions in that function and the
assertion will fail.

A test case (test/DebugInfo/cross-cu-linkonce-distinct.ll) is added, the
assertion removed and a comment added to explain this situation.

Original commit message:

If a function isn't actually in a CU's subprogram list in the debug info
metadata, ignore all the DebugLocs and don't try to build scopes, track
variables, etc.

While this is possibly a minor optimization, it's also a correctness fix
for an incoming patch that will add assertions to LexicalScopes and the
debug info verifier to ensure that all scope chains lead to debug info
for the current function.

Fix up a few test cases that had broken/incomplete debug info that could
violate this constraint.

Add a test case where this occurs by design (inlining a
debug-info-having function in an attribute nodebug function - we want
this to work because /if/ the nodebug function is then inlined into a
debug-info-having function, it should be fine (and will work fine - we
just stitch the scopes up as usual), but should the inlining not happen
we need to not assert fail either).

llvm-svn: 212649
 		2014-07-09 21:02:41 +00:00
..
2010-04-13-PubType.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
2010-08-10-DbgConstant.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
2011-09-26-GlobalVarContext.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
2011-12-16-BadStructRef.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
DW_AT_byte_size.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
DW_AT_linkage_name.ll DebugInfo: Generalize some tests to handle variations in attribute ordering. 2014-05-23 21:11:46 +00:00
DW_AT_location-reference.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
DW_AT_object_pointer.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
DW_AT_specification.ll Fix up scoping in a few tests (and delete one that validates unnecessary behavior). 2014-06-24 20:10:27 +00:00
DW_AT_stmt_list_sec_offset.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
DW_TAG_friend.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
aligned_stack_var.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
arange.ll Disable emission of aranges by default and add a command line 2014-02-14 01:26:55 +00:00
arguments.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
array.ll This reapplies r207235 with an additional bugfixes caught by the msan 2014-04-25 20:49:25 +00:00
array2.ll Unbreak the gdb buildbot by not lowering dbg.declare intrinsics for arrays. 2014-04-25 23:00:25 +00:00
block-capture.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
byvalstruct.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
c-type-units.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
coff_debug_info_type.ll Fix another asserting method in the null streamer. 2014-06-25 05:37:58 +00:00
coff_relative_names.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
concrete_out_of_line.ll Recommit r212203: Don't try to construct debug LexicalScopes hierarchy for functions that do not have top level debug information. 2014-07-09 21:02:41 +00:00
cu-ranges-odr.ll If we're only emitting line tables for a particular CU then don't add 2014-02-27 01:25:00 +00:00
cu-ranges.ll Move the function and data section flags into the options struct and 2014-05-20 21:25:34 +00:00
data_member_location.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
dbg-at-specficiation.ll DebugInfo: Assert that a CU's subprogram list contains only subprograms. 2014-05-14 21:52:37 +00:00
dbg-byval-parameter.ll Reland r200340 - 'Add line table debug info to COFF files when using a win32 triple' 2014-01-30 01:39:17 +00:00
dbg-const-int.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
dbg-const.ll Debug info: Store the DIVariable in DebugLocEntry also for constants, 2014-04-11 17:49:47 +00:00
dbg-declare-arg.ll DebugInfo: Assume the CU's Subprogram list only contains definitions. 2014-05-16 18:26:53 +00:00
dbg-declare.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
dbg-file-name.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
dbg-i128-const.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
dbg-merge-loc-entry.ll Add a DIELoc class to cover the DW_FORM_exprloc set of expressions 2014-02-16 08:46:55 +00:00
dbg-prolog-end.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
dbg-subrange.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
dbg-value-const-byref.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
dbg-value-dag-combine.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
dbg-value-inlined-parameter.ll DebugInfo: Reference abstract definitions from variables in concrete definitions that preceed their first inline definition. 2014-06-13 22:35:44 +00:00
dbg-value-isel.ll test/DebugInfo/X86/dbg-value-isel.s: correct lexical block descriptor to match schema 2014-06-13 21:52:28 +00:00
dbg-value-location.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
dbg-value-range.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
dbg-value-terminator.ll Fix up scoping in a few tests (and delete one that validates unnecessary behavior). 2014-06-24 20:10:27 +00:00
dbg_value_direct.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
debug-dead-local-var.ll Add a comment here. 2014-05-21 00:02:50 +00:00
debug-info-block-captured-self.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
debug-info-blocks.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
debug-info-static-member.ll DwarfUnit: Share common constant value emission between APInts of small (<= 64 bit) and MCOperand immediates. 2014-05-11 15:47:39 +00:00
debug-loc-asan.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
debug-loc-offset.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
debug-ranges-offset.ll Make sure that rangelists are also relative to the compile unit 2014-04-25 22:23:54 +00:00
debug_frame.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
decl-derived-member.ll decl-derived-member.ll: Try to unbreak. Don't add -mtriple to %llc_dwarf. 2014-03-12 23:08:19 +00:00
discriminator.ll Use a fixed subtarget for test so atom scheduling can't change the addresses this test relies on. 2014-03-15 23:01:29 +00:00
dwarf-aranges-no-dwarf-labels.ll Disable emission of aranges by default and add a command line 2014-02-14 01:26:55 +00:00
dwarf-aranges.ll DebugInfo: Improve test to not depend on the specific naming of temporary symbols 2014-03-07 00:23:38 +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
dwarf-pubnames-split.ll DebugInfo: Refactor emitDebugPubNames/Types into a common implementation 2014-03-11 23:18:15 +00:00
earlydup-crash.ll Debug Info: update testing cases to specify the debug info version number. 2013-11-22 21:49:45 +00:00
elf-names.ll Fix up scoping in a few tests (and delete one that validates unnecessary behavior). 2014-06-24 20:10:27 +00:00
empty-and-one-elem-array.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
empty-array.ll DebugInfo: Use a 64 bit type for the subrange 2014-04-03 06:28:20 +00:00
ending-run.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
enum-class.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
enum-fwd-decl.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
fission-cu.ll DebugInfo: Add GNU_addr_base and GNU_ranges_base only when there are addresses or ranges 2014-03-25 05:34:24 +00:00
fission-hash.ll Turn on hashing by default for split dwarf compile units. 2014-03-12 17:14:43 +00:00
fission-ranges.ll DebugInfo: Fission: Ensure the address pool entries for location lists are emitted. 2014-06-19 17:59:14 +00:00
formal_parameter.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
generate-odr-hash.ll DebugInfo: pubnames: include file-local (static or anonymous namespace) variables and anonymous namespaces themselves. 2014-06-06 22:16:56 +00:00
gnu-public-names-empty.ll DebugInfo: Tag units as having been indexed in GNU pubnames by using a DW_AT_GNU_pubnames of DW_FORM_flag(_present) rather than sec_offsets to the pubnames/types sections 2014-03-06 05:47:39 +00:00
gnu-public-names.ll Fix typos 2014-06-07 21:23:09 +00:00
inline-member-function.ll DebugInfo: Lazily construct subprogram definition DIEs. 2014-05-27 18:37:48 +00:00
inline-seldag-test.ll DebugInfo: Lazily construct subprogram definition DIEs. 2014-05-27 18:37:48 +00:00
instcombine-instrinsics.ll This reapplies r207235 with an additional bugfixes caught by the msan 2014-04-25 20:49:25 +00:00
lexical_block.ll DebugInfo: Use DW_FORM_data4 for DW_AT_high_pc in DW_TAG_lexical_blocks 2014-03-08 00:58:20 +00:00
line-info.ll Support DWARF discriminators in object streamer. 2014-02-14 19:27:53 +00:00
linkage-name.ll DebugInfo: Sure up subprogram variable list handling with more assertions and fewer conditionals. 2014-05-14 21:52:46 +00:00
lit.local.cfg Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
low-pc-cu.ll Reapply DW_AT_low/high_pc patch: 2014-03-20 19:16:16 +00:00
main-file-name.s Now that llvm-dwarfdump supports flags to specify which DWARF section to dump, 2013-01-25 21:44:53 +00:00
misched-dbg-value.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
multiple-aranges.ll Disable emission of aranges by default and add a command line 2014-02-14 01:26:55 +00:00
multiple-at-const-val.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
nondefault-subrange-array.ll DebugInfo: Use a 64 bit type for the subrange 2014-04-03 06:28:20 +00:00
objc-fwd-decl.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
objc-property-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
op_deref.ll Debug info: split out complex DIVariable address expressions into a 2014-06-30 17:17:35 +00:00
parameters.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
pointer-type-size.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
pr11300.ll DebugInfo: Generalize some tests to handle variations in attribute ordering. 2014-05-23 21:11:46 +00:00
pr12831.ll Fix up scoping in a few tests (and delete one that validates unnecessary behavior). 2014-06-24 20:10:27 +00:00
pr13303.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
pr19307.ll Generate better location ranges for some register-described variables. 2014-06-09 21:53:47 +00:00
prologue-stack.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
ref_addr_relocation.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
reference-argument.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
rvalue-ref.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
sret.ll DebugInfo: Following up to r209677, refactor local variable emission to delay the choice between emitting the definition attributes or using DW_AT_abstract_definition 2014-06-13 22:18:23 +00:00
stmt-list-multiple-compile-units.ll DebugInfo: Avoid creating unnecessary/empty line tables and remove the special case of '0' in DwarfCompileUnit::initStmtList by just always using a label difference 2014-04-01 08:07:52 +00:00
stmt-list.ll DebugInfo: Avoid creating unnecessary/empty line tables and remove the special case of '0' in DwarfCompileUnit::initStmtList by just always using a label difference 2014-04-01 08:07:52 +00:00
stringpool.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
struct-loc.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
subrange-type.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
subreg.ll Debug info: Remove ARMAsmPrinter::EmitDwarfRegOp(). AsmPrinter can now 2014-02-27 17:56:08 +00:00
subregisters.ll DebugInfo: Refactor some tests to allow DW_AT_name to not be the first attribute in a local variable. 2014-06-13 21:52:33 +00:00
template.ll Add a DIELoc class to cover the DW_FORM_exprloc set of expressions 2014-02-16 08:46:55 +00:00
tls.ll DebugInfo: Deduplicate entries in the fission address table 2014-02-15 19:34:03 +00:00
type_units_with_addresses.ll Include C++ source for debug info test case committed in r207323 2014-04-26 18:25:07 +00:00
union-template.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
vector.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
vla.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