less mysterious.

llvm-svn: 59782

llvm-svn: 59781

because the boolean it returns to indicate an overflow may not be treated like
as a flag. It could be stored to memory, for instance.

llvm-svn: 59780

"ISD::ADDO". ISD::ADDO is lowered into a target-independent form that does the
addition and then checks if the result is less than one of the operands. (If it
is, then there was an overflow.)

llvm-svn: 59779

llvm-svn: 59778

llvm-svn: 59777

schedulers. This doesn't have much immediate impact because
targets that use these schedulers by default don't yet provide
pipeline information.

This code also didn't have the benefit of register pressure
information. Also, removing it will avoid problems with list-burr
suddenly starting to do latency-oriented scheduling on x86 when we
start providing pipeline data, which would increase spilling.

llvm-svn: 59775

with a raw lexer instead of a PP lexer.  This means that -verify doesn't scan
#include'd headers for expected-error/warning strings, and it also means that it
doesn't ignore them in #if 0.

llvm-svn: 59774

llvm-svn: 59773

llvm-svn: 59772

llvm-svn: 59771

llvm-svn: 59770

- Move out logic for handling the end-of-file to LexEndOfFile (to match the Lexer) class.  The logic now mirrors the Lexer class more, which allows us to pass most of the Preprocessor test cases.

llvm-svn: 59768

code gen. method.

llvm-svn: 59767

llvm-svn: 59766

llvm-svn: 59765

- Add check for returning an undefined value to a caller.

llvm-svn: 59764

it produces are not affected by the change.

llvm-svn: 59763

llvm-svn: 59762

some of the latency computation logic out of the SDNode
ScheduleDAG code into a TargetInstrItineraries helper method
to help with this.

llvm-svn: 59761

condition in an addition operation.

llvm-svn: 59760

the RR scheduler actually does look at latency values, but it
doesn't use a hazard recognizer so it has no way to know when
a no-op is needed, as opposed to just stalling and incrementing
the cycle count.

llvm-svn: 59759

llvm-svn: 59758

inlining function, then increase the stack protection level on the inlining
function.

llvm-svn: 59757

that an overflow/carry occured. These are converted into ISD::[SU]ADDO nodes,
which are lowered in a target-independent way into something sane. Eventually,
each target can implement their own method of checking the overflow/carry flags.

llvm-svn: 59756

llvm-svn: 59755

llvm-svn: 59754

llvm-svn: 59753

llvm-svn: 59752

write-barriers.

llvm-svn: 59748

MachineInstr scheduling DAG, meaning they implicitly depend on all
preceding defs. This fixes Benchmarks/Shootout-C++/except and
Regression/C++/EH/simple_rethrow in
  -relocation-model=pic -disable-post-RA-scheduler=false
mode.

llvm-svn: 59747

llvm-svn: 59746

llvm-svn: 59745

- Move PTHLexer::GetToken() to be inside PTHLexer.cpp.
- When lexing in raw mode, null out identifiers.

llvm-svn: 59744

llvm-svn: 59743

llvm-svn: 59741

llvm-svn: 59740

llvm-svn: 59739

to static function. Added comments.

llvm-svn: 59738

llvm-svn: 59737