llvm-svn: 59802

llvm-svn: 59801

a subtract is cheaper than a multiply. This generalizes an existing transform.

llvm-svn: 59800

and fall through better.

llvm-svn: 59799

the Diagnostic class. Since we can already only have one diagnostic in 
flight at a time, this shrinks DiagnosticInfo.

This reduces DiagnosticInfo to being basically a rather crazy smart pointer
to a DiagnosticInfo :)

llvm-svn: 59798

in the DiagnosticInfo class.  This requires marking them as taking
a const DiagnosticInfo, which is bogus (they logically mutate DI), 
but works with the C++ type system.

llvm-svn: 59797

llvm-svn: 59795

llvm-svn: 59794

llvm-svn: 59792

llvm-svn: 59791

(a) Fix bgs 3052, 3057
(b) Incorporate Duncan's suggestions re: i1 promotion
(c) Indentation updates.

llvm-svn: 59790

llvm-svn: 59789

llvm-svn: 59788

llvm-svn: 59787

llvm-svn: 59786

llvm-svn: 59785

llvm-svn: 59784

llvm-svn: 59783

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