Use DW_FORM_data2 for DW_AT_language and let users use DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.

llvm-svn: 126339

Do not emit empty DW_TAG_lexical_block DIEs.  In one test case, size of debug info reduced by almost 7%.

llvm-svn: 126009

Ignore DBG_VALUE machine instructions while constructing instruction ranges based on location info. 
Machine instruction range consisting of only DBG_VALUE MIs only contributes consecutive labels in assembly output, which is harmless, and empty scope entry in DebugInfo, which confuses debugger tools.

llvm-svn: 125577

llvm-svn: 124904

llvm-svn: 124755

llvm-svn: 124752

llvm-svn: 123862

llvm-svn: 123856

This is not yet completely enabled.

llvm-svn: 123274

Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.

llvm-svn: 123170

llvm-svn: 123039

Enable live debug variables pass.

llvm-svn: 123032

This fixes PR 8913 crash.

llvm-svn: 122971

This fixes radar 8730409.

llvm-svn: 121323

This will be used to truncate live range of DBG_VALUE instruction by register allocator and friends.

llvm-svn: 121061

llvm-svn: 120298

llvm-svn: 119904

llvm-svn: 119754

and testing is easier.  A good example is the unknown-location.ll test that
now can just look for ".loc 1 0 0".  We also don't use a DW_LNE_set_address for
every address change anymore.

llvm-svn: 119613

llvm-svn: 118940

Take care of special characters while creating named MDNode name to hold function specific local variable's info.
This fixes radar 8653152. I am checking in testcase as a separate check-in.

llvm-svn: 118726

llvm-svn: 118027

llvm-svn: 117615

llvm-svn: 117588

llvm-svn: 117563

s/endScope/endInstruction/g

llvm-svn: 117376

declarations in !NDEBUG to avoid -Wunused-variable warnings. Patch by
Matt Beaumont-Gay!

llvm-svn: 117345

Add simple counter to count no. of basic blocks without any line number information. At -O0, these basic block coule cause less than optimial debugging experience.

llvm-svn: 117307

llvm-svn: 116061

llvm-svn: 115988

llvm-svn: 115833

llvm-svn: 115378

llvm-svn: 115102

llvm-svn: 115089

llvm-svn: 115067

llvm-svn: 114969

llvm-svn: 114920

llvm-svn: 114585

If FE forgot to provide a file name (usually it uses "stdin" as name in such situation) then make one up to ensure that debug info is not malformed.

llvm-svn: 114119

llvm-svn: 112830