This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640

Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379

This started as a small change, I swear.  Unfortunately, lots of things call the [I|F]CmpInst constructors.  Who knew!?

llvm-svn: 75200

these instructions, no autoupgrade or backwards compatibility support is
provided.

llvm-svn: 74991

llvm-svn: 74748

move loads back past a check that the load address
is valid, see new testcase.  The test that went
in with 72661 has exactly this case, except that
the conditional it's moving past is checking
something else; I've settled for changing that
test to reference a global, not a pointer.  It
may be possible to scan all the tests you pass and
make sure none of them are checking any component
of the address, but it's not trivial and I'm not
trying to do that here.

llvm-svn: 73632

llvm-svn: 73625

llvm-svn: 73398

integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.

For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.

This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt

llvm-svn: 72897

a single predecessor.

Patch by Jakub Staszak.

llvm-svn: 72661

llvm-svn: 72589

llvm-svn: 72577

is, otherwise we get a <badref>.

llvm-svn: 72567

This is useful when trying to figure out why GVN didn't eliminate redundant
loads.

llvm-svn: 72565

Diagnosis and patch thanks to Jakub Staszak.

llvm-svn: 72562

the optimizers about this.  For example, a readonly
function with no uses cannot be removed unless it is
also marked nounwind.

llvm-svn: 71071

llvm-svn: 68262

  Applications/Burg/burg
  Applications/ClamAV/clamscan
and many other tests.

llvm-svn: 68211

llvm-svn: 68172

Also fixed a punctuation error in the header comment.
This fixes PR3775.

llvm-svn: 66542

llvm-svn: 66244

llvm-svn: 64363

llvm-svn: 64065

llvm-svn: 64062

llvm-svn: 62535

llvm-svn: 61358

llvm-svn: 61354

llvm-svn: 61353

llvm-svn: 61352

llvm-svn: 61350

llvm-svn: 61349

truely deleted. These will be expanded with further checks of all of the data
structures.

llvm-svn: 61347

llvm-svn: 61222

llvm-svn: 61219

and safe and orthogonal from turning off load pre.

llvm-svn: 61177

with everyone's favorite error messages:

Comparing stages 2 and 3
warning: ./cc1-checksum.o differs
warning: ./cc1plus-checksum.o differs
Bootstrap comparison failure!
./c-decl.o differs
./cp/decl.o differs
./df-core.o differs
./gcc.o differs
./i386.o differs
./stor-layout.o differs
./tree-pretty-print.o differs
./tree.o differs
make[2]: *** [compare] Error 1
make[1]: *** [stage3-bubble] Error 2

See PR3227.

llvm-svn: 61169

CFG when there is exactly one predecessor where the load is not available.
This is designed to not increase code size but still eliminate partially
redundant loads.  This fires 1765 times on 403.gcc even though it doesn't
do critical edge splitting yet (the most common reason for it to fail).

llvm-svn: 61027

llvm-svn: 61024

cleans up the generated code a bit.  This should have the added benefit of
not randomly renaming functions/globals like my previous patch did. :)

llvm-svn: 61023

Add support for slow-path GVN with full phi construction for scalars.  This is disabled for now, as it actually pessimizes code in the abscence
of phi translation for load elimination.  This slow down GVN a bit, by about 2% on 403.gcc.

llvm-svn: 61021