llvm-svn: 68974

Right now, Debugging information to encode scopes (DW_TAG_lexical_block) relies on DBG_LABEL. Unfortunately this intefers with the quality of optimized code. 
This patch updates dwarf writer to encode scoping information in DWARF only in FastISel mode.

llvm-svn: 68973

llvm-svn: 68972

llvm-svn: 68971

llvm-svn: 68969

Change diagnostic as a result of researching <rdar://problem/6779809> missing interface name in "error: cannot declare variable inside a class, protocol or category ''.

Since ObjC 2.0 class "extensions" have a null name, the diagnostic above is actually "correct". Nevertheless, it is confusing. Decided to remove the name entirely (from my perspective, it didn't add any value). Also simplified the text of the diagnostic a bit.

llvm-svn: 68967

 - Ted, please check.

 - Missing test case because PTH won't reliably cache the tokens in a
   test case. *cough*

llvm-svn: 68966

the unlikely event that the filename IDs in the stored line table end
up being different from the filename IDs in the newly-created line
table.

llvm-svn: 68965

Reapply 68847.
Now debug_inlined section is covered by TAI->doesDwarfUsesInlineInfoSection(), which is false by default.

llvm-svn: 68964

properly cope with #line directives in PCH files.

llvm-svn: 68963

 - Add patterns for h-register extract, which avoids a shift and mask,
   and in some cases a temporary register.
 - Add address-mode matching for turning (X>>(8-n))&(255<<n), where
   n is a valid address-mode scale value, into an h-register extract
   and a scaled-offset address.
 - Replace X86's MOV32to32_ and related instructions with the new
   target-independent COPY_TO_SUBREG instruction.

On x86-64 there are complicated constraints on h registers, and
CodeGen doesn't currently provide a high-level way to express all of them,
so they are handled with a bunch of special code. This code currently only
supports extracts where the result is used by a zero-extend or a store,
though these are fairly common.

These transformations are not always beneficial; since there are only
4 h registers, they sometimes require extra move instructions, and
this sometimes increases register pressure because it can force out
values that would otherwise be in one of those registers. However,
this appears to be relatively uncommon.

llvm-svn: 68962

This will be used to replace things like X86's MOV32to32_.

Enhance ScheduleDAGSDNodesEmit to be more flexible and robust
in the presense of subregister superclasses and subclasses. It
can now cope with the definition of a virtual register being in
a subclass of a use.

Re-introduce the code for recording register superreg classes and
subreg classes. This is needed because when subreg extracts and
inserts get coalesced away, the virtual registers are left in
the correct subclass.

llvm-svn: 68961

Factor the internals of SourceManager (specially, LineTableInfo) into a separate Internals header. No functionality change

llvm-svn: 68960

ISD::SIGN_EXTEND_INREG. Tablegen-generated code can handle
these cases, and the scheduling issues observed earlier
appear to be resolved now.

llvm-svn: 68959

llvm-svn: 68958

in multiple classes in the case that the classes are all
in subset/superset relations. This function is used by the
fast-isel emitter, which always wants the super-most set.

llvm-svn: 68957

a live interval. This is needed for some upcoming subreg changes.

llvm-svn: 68956

the subreg field to 0, since the subreg field is only used
for virtual register subregs. This doesn't change
current functionality; it just eliminates bogus noise from
debug output.

llvm-svn: 68955

llvm-svn: 68954

llvm-svn: 68953

deterministic when faced with an ambiguity. This eliminates the
annoying test/SemaCXX/using-directive.cpp failure.

llvm-svn: 68952

llvm-svn: 68951

llvm-svn: 68950

and IMPLICIT_DEF.

llvm-svn: 68949

This unbreaks the JIT on x86-64.

llvm-svn: 68948

llvm-svn: 68947

While passing arg of types larger than char only one byte at lower end was getting passed. We couldn't catch this as we did not have tests that were passing an int value larger than 256.

llvm-svn: 68946

llvm-svn: 68945

declarations.

llvm-svn: 68944

llvm-svn: 68943

llvm-svn: 68942

in different address spaces.

llvm-svn: 68941

to support C99 inline, GNU extern inline, etc.  Related bugzilla's
include PR3517, PR3100, & PR2933.  Nothing uses this yet, but it
appears to work.

llvm-svn: 68940

llvm-svn: 68939

llvm-svn: 68938

interpreter mode" when it's not.

llvm-svn: 68937

llvm-svn: 68936

llvm-svn: 68935

llvm-svn: 68934

llvm-svn: 68933