r124468.  Patch by Rafael Avila de Espindola!

llvm-svn: 126297

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: 125563

llvm-svn: 125225

llvm-svn: 124904

llvm-svn: 124755

llvm-svn: 124752

llvm-svn: 124569

llvm-svn: 124468

llvm-svn: 124150

llvm-svn: 123862

llvm-svn: 123856

llvm-svn: 123491

Add a possibility to switch between CFI directives- and table-based frame description emission. Currently all the backends use table-based stuff.

llvm-svn: 123476

llvm-svn: 123474

llvm-svn: 123473

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

Instead encode llvm IR level property "HasSideEffects" in an operand (shared
with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check
the operand when the instruction is an INLINEASM.

This allows memory instructions to be moved around INLINEASM instructions.

llvm-svn: 123044

llvm-svn: 123039

Enable live debug variables pass.

llvm-svn: 123032

This fixes PR 8913 crash.

llvm-svn: 122971

so that Dominators.h is *just* domtree.  Also prune #includes a bit.

llvm-svn: 122714

llvm-svn: 122193

for each constant pool entry.  Using WriteTypeSymbolic here takes time
proportional to the size of the module, for each constant pool entry.

This speeds up -verbose-asm llc on 252.eon (a random testcase at my disposal)
from 4.4s to 2.137s.  llc takes 2.11s with asm-verbose off, so this is now a
pretty reasonable cost for verbose comments.

llvm-svn: 121691

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

as llc + llvm-mc. This time ELF is not changed and I tested that llvm-gcc
bootstrap on darwin10 using darwin9's assembler and linker.

llvm-svn: 121006

linux and darwin assemblers happy :-(

llvm-svn: 121004

that no relocations are used (on MochO).
Fixes llc producing different output from llc + llvm-mc.

llvm-svn: 121000

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

SrcMgrDiagHandler, we can improve clang diagnostics for inline asm:
instead of reporting them on a source line of the original line,
we can report it on the correct line wherever the string literal came
from. For something like this:

void foo() {
  asm("push %rax\n"
      ".code32\n");
}

we used to get this: (note that the line in t.c isn't helpful)

t.c:4:7: error: warning: ignoring directive for now
  asm("push %rax\n"
      ^
<inline asm>:2:1: note: instantiated into assembly here
.code32
^

now we get:

t.c:5:8: error: warning: ignoring directive for now
      ".code32\n"
       ^
<inline asm>:2:1: note: instantiated into assembly here
.code32
^

Note that we're pointing to line 5 properly now.

llvm-svn: 119488

cookie argument to the SourceMgr diagnostic stuff.  This cleanly separates
LLVMContext's inlineasm handler from the sourcemgr error handling 
definition, increasing type safety and cleaning things up.

llvm-svn: 119486

the cookie argument to setDiagHandler

llvm-svn: 119483

llvm-svn: 119482

llvm-svn: 118940