While extracting lexical scopes from machine instruction stream, work on one machine basic block at a time. 

llvm-svn: 136106

llvm-svn: 135633

There are two ways to map a variable to its lexical scope. Lexical scope information is embedded in MDNode describing the variable. It is also available as a part of DebugLoc attached with DBG_VALUE instruction. DebugLoc attached with an instruction is less reliable in optimized code so use information embedded in the MDNode.

llvm-svn: 135629

llvm-svn: 135528

llvm-svn: 135302

llvm-svn: 135278

llvm-svn: 135254

llvm-svn: 135232

llvm-svn: 135212

Improve DbgScope->dump() output.

llvm-svn: 135207

llvm-svn: 135127

llvm-svn: 135124

llvm-svn: 135118

llvm-svn: 135111

llvm-svn: 135110

llvm-svn: 134703

llvm-svn: 134702

llvm-svn: 134643

llvm-svn: 134572

llvm-svn: 134561

llvm-svn: 133821

llvm-svn: 132668

llvm-svn: 132433

llvm-svn: 132427

llvm-svn: 132371

llvm-svn: 132222

llvm-svn: 132193

llvm-svn: 131940

llvm-svn: 131936

Identify end of prologue (and beginning of function body) using DW_LNS_set_prologue_end line table opcode.

llvm-svn: 131194

DwarfRequiresRelocationForSectionOffset as this is not specific to StmtList.

llvm-svn: 131148

llvm-svn: 131106

Move CompileUnit::getOrCreateNameSpace() and CompileUnit::addPubType() from DwarfDebug.cpp to DwarfCompileUnit.cpp

llvm-svn: 130991

llvm-svn: 130984

llvm-svn: 130955

llvm-svn: 130933

it is both inefficient and unexpected by dwarfdump. Change to
a DW_FORM_data4.

While in here, change the predicate name to reflect that the position
is not really absolute (it is an offset), just that the linker needs a
relocation.

llvm-svn: 130846

Tighten up check for empty (i.e. no meaningful debug info) module. This fixes dwarf-die2.c test case from gcc test suite.

llvm-svn: 130842

Even if the subprogram is going to use AT_specification, emit DW_AT_MIPS_linkage_name. This helps gdb and fixes var-path-expr.exp regression reported by gdb testsuite.

llvm-svn: 130794

If the front end has emitted llvm.dbg.cu and other debug info anchors (clang does it now) then use them directly. This saves one scan of entire module, to collect debug info, which in turns saves few machine cycles at compile time.

llvm-svn: 130759