fold immediates into stores in simple cases, this produces diffs like
this:

- movl $0, %eax
- movl %eax, _yy_n_chars
+ movl $0, _yy_n_chars

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57555 91177308-0d34-0410-b5e6-96231b3b80d8

fold compare of null pointer into compare with 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57553 91177308-0d34-0410-b5e6-96231b3b80d8

Some minor cleanups:
1. Compute action in X86SelectSelect based on MVT instead of type.
2. Use TLI.getValueType(..) instead of MVT::getVT(..) because the former
   handles pointers and the later doesn't.
3. Don't pass TLI into isTypeLegal, since it already has access to it as
   an ivar.

#2 gives fast isel some minor new functionality: handling load/stores of
pointers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57552 91177308-0d34-0410-b5e6-96231b3b80d8

Use switch on VT instead of Type* comparisons.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57551 91177308-0d34-0410-b5e6-96231b3b80d8

Use X86FastEmitCompare for FCMP_OEQ and FCMP_UNE: it doesn't
change the generated code, but makes the code simpler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57550 91177308-0d34-0410-b5e6-96231b3b80d8

refactor compare emission out into a new X86FastEmitCompare method,
which makes it easy to share the compare/imm folding logic with 'setcc'.
This shaves a bunch of instructions off the common select case, which
happens a lot in llvm-gcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57549 91177308-0d34-0410-b5e6-96231b3b80d8

Fold immediates into compares when possible, producing "cmp $4, %eax" instead of
loading 4 into a register and then doing the compare.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57548 91177308-0d34-0410-b5e6-96231b3b80d8

more minor refactoring of X86SelectBranch, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57547 91177308-0d34-0410-b5e6-96231b3b80d8

factor buildmi calls in X86SelectBranch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57546 91177308-0d34-0410-b5e6-96231b3b80d8

factor some more BuildMI's in X86SelectCmp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57545 91177308-0d34-0410-b5e6-96231b3b80d8

factor some BuildMI calls, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57544 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust whitespace in debug messages to be more consistent
with other debug messages.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57543 91177308-0d34-0410-b5e6-96231b3b80d8

- Add target lowering hooks that specify which setcc conditions are illegal,
i.e. conditions that cannot be checked with a single instruction. For example,
SETONE and SETUEQ on x86.
- Teach legalizer to implement *illegal* setcc as a and / or of a number of
legal setcc nodes. For now, only implement FP conditions. e.g. SETONE is
implemented as SETO & SETNE, SETUEQ is SETUO | SETEQ.
- Move x86 target over.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57542 91177308-0d34-0410-b5e6-96231b3b80d8

FastISel support for exception-handling constructs.
 - Move the EH landing-pad code and adjust it so that it works
   with FastISel as well as with SDISel.
 - Add FastISel support for @llvm.eh.exception and
   @llvm.eh.selector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57539 91177308-0d34-0410-b5e6-96231b3b80d8

Prevent assert when using '"' in names (via hexadecimal).

Update LangRef to mention \xx quoting in names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57538 91177308-0d34-0410-b5e6-96231b3b80d8

Change getLLVMName to use raw_ostream & PrintLLVMName.
 - Avoids duplicated quotification code.
 - Remove QuoteNameIfNeeded.
 - No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57537 91177308-0d34-0410-b5e6-96231b3b80d8

Add llvm::hexdigit to StringExtras (number -> hexadecimal char)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57536 91177308-0d34-0410-b5e6-96231b3b80d8

Add some ReleaseNotes on clang codegen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57535 91177308-0d34-0410-b5e6-96231b3b80d8

Remove Stacker.html from Xcode project.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57534 91177308-0d34-0410-b5e6-96231b3b80d8

Accept -march=i586, because gcc does (a synonym
for pentium).  Fixes
gcc.target/i386/20000720-1.c
gcc.target/i386/pr26826.c

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57528 91177308-0d34-0410-b5e6-96231b3b80d8

Rename LoadX to LoadExt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57526 91177308-0d34-0410-b5e6-96231b3b80d8

Update ARM Insn encoding to get endian-ness to match the documentation (31-0 left to right)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57524 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57522 91177308-0d34-0410-b5e6-96231b3b80d8

Fix command-line option printing to print two spaces where needed,
instead of requiring all "short description" strings to begin with
two spaces. This makes these strings less mysterious, and it fixes
some cases where short description strings mistakenly did not
begin with two spaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57521 91177308-0d34-0410-b5e6-96231b3b80d8

Document attributes changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57518 91177308-0d34-0410-b5e6-96231b3b80d8

Add VMKit notes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57517 91177308-0d34-0410-b5e6-96231b3b80d8

Combine (fcmp cc0 x, y) | (fcmp cc1 x, y) into a single fcmp when possible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57515 91177308-0d34-0410-b5e6-96231b3b80d8

- Somehow I forgot about one / une.
- Renumber fcmp predicates to match their icmp counterparts.
- Try swapping operands to expose more optimization opportunities.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57513 91177308-0d34-0410-b5e6-96231b3b80d8

Fix indentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57508 91177308-0d34-0410-b5e6-96231b3b80d8

Optimize anding of two fcmp into a single fcmp if the operands are the same. e.g. uno && ueq -> ueq
     ord && olt -> olt
     ord && ueq -> oeq

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57507 91177308-0d34-0410-b5e6-96231b3b80d8

Mention a few methods in ConstantSDNode that were renamed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57505 91177308-0d34-0410-b5e6-96231b3b80d8

HTML syntax fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57503 91177308-0d34-0410-b5e6-96231b3b80d8

Fix missing end tags and invalid HTML entity syntax.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57500 91177308-0d34-0410-b5e6-96231b3b80d8

Add a missing close-tag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57497 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a few close tags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57496 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57495 91177308-0d34-0410-b5e6-96231b3b80d8

Add a brief mention of the new free-list management code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57490 91177308-0d34-0410-b5e6-96231b3b80d8

minor corrections, improved formatting

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57486 91177308-0d34-0410-b5e6-96231b3b80d8

typo and formatting tweaks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57485 91177308-0d34-0410-b5e6-96231b3b80d8

little optimization: reuse getPointerToGlobalIfAvailable(CGV) value in emitGlobals()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57484 91177308-0d34-0410-b5e6-96231b3b80d8

Mention the different constant folders that IRBuilder
can use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57483 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR2797

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57481 91177308-0d34-0410-b5e6-96231b3b80d8

add some upgrading notes from Pekka.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57480 91177308-0d34-0410-b5e6-96231b3b80d8

add LSR and frameaddress info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57478 91177308-0d34-0410-b5e6-96231b3b80d8

Add static analyzer notes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57475 91177308-0d34-0410-b5e6-96231b3b80d8

Remove stale src, core directories.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57473 91177308-0d34-0410-b5e6-96231b3b80d8

more minor updates

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57472 91177308-0d34-0410-b5e6-96231b3b80d8

more changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57470 91177308-0d34-0410-b5e6-96231b3b80d8

optimizer and codegen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57468 91177308-0d34-0410-b5e6-96231b3b80d8

more updates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57466 91177308-0d34-0410-b5e6-96231b3b80d8

When doing the very-late shift-and address-mode optimization,
create a new DAG node to represent the new shift to keep the
DAG consistent, even though it'll almost always be folded into
the address.

If a user of the resulting address has multiple uses, the
nodes may get revisited by a later MatchAddress call, in which
case DAG inconsistencies do matter.

This fixes PR2849.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57465 91177308-0d34-0410-b5e6-96231b3b80d8

describe major new features and llvm-gcc features.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57463 91177308-0d34-0410-b5e6-96231b3b80d8

Don't barf on 32 bit platforms if llvm-gcc is
not built with 64 bit support.  Since this test
passes without -m64 on x86-32-linux, just remove
the -m64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57462 91177308-0d34-0410-b5e6-96231b3b80d8

FIX PR2794. Make sure SIGN_EXTEND_INREG nodes introduced by LegalizeSetCCOperands are leglized. Patch by Richard Pennington.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57460 91177308-0d34-0410-b5e6-96231b3b80d8

MarkModRef -> AddReadAttrs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57459 91177308-0d34-0410-b5e6-96231b3b80d8

Also update sub-register intervals after a trivial computation is rematt'ed for a copy instruction. PR2775.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57458 91177308-0d34-0410-b5e6-96231b3b80d8

Add some llvm-gcc changes that may be worth
detailing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57457 91177308-0d34-0410-b5e6-96231b3b80d8

Add a test case for _Complex passed as a FCA.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57456 91177308-0d34-0410-b5e6-96231b3b80d8

give the static analyzer its own section.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57455 91177308-0d34-0410-b5e6-96231b3b80d8

more rearranging.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57453 91177308-0d34-0410-b5e6-96231b3b80d8

move major changes down.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57452 91177308-0d34-0410-b5e6-96231b3b80d8

Fix typo.  Add note on trampoline support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57450 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify meaning of copyRegToReg's return value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57449 91177308-0d34-0410-b5e6-96231b3b80d8

Update the Ada part.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57447 91177308-0d34-0410-b5e6-96231b3b80d8

final note.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57446 91177308-0d34-0410-b5e6-96231b3b80d8

fix some crazily long lines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57444 91177308-0d34-0410-b5e6-96231b3b80d8

Make InstructionCombining::getBitCastOperand() recognize GEP instructions and
constant expression with all zero indices as being the same as a bitcast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57442 91177308-0d34-0410-b5e6-96231b3b80d8

Improve the description on the getelementptr instruction. It should now better
define what the instruction does. This also makes it clear that getelementptr
can index into a vector type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57440 91177308-0d34-0410-b5e6-96231b3b80d8

 * Make TargetLowering not crash when TargetMachine::getTargetAsmInfo() returns
   null. This assumes that any target that does not have AsmInfo, does not
   support "LocAndDot".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57438 91177308-0d34-0410-b5e6-96231b3b80d8

Make MachineFunction not crash when TargetMachine::getRegisterInfo() returns
NULL, but just hide some debug output then.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57437 91177308-0d34-0410-b5e6-96231b3b80d8

fix typo's

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57435 91177308-0d34-0410-b5e6-96231b3b80d8

remove a deprecated internal interface

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57434 91177308-0d34-0410-b5e6-96231b3b80d8

do not use deprecated interfaces

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57433 91177308-0d34-0410-b5e6-96231b3b80d8

ignore the standard output dirs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57432 91177308-0d34-0410-b5e6-96231b3b80d8

Disallow the construction of SCEVs with could-not-compute operands. Catch CNCs
returned by BinomialCoefficient and don't try to operate with them. This
replaces the previous fix for PR2857.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57431 91177308-0d34-0410-b5e6-96231b3b80d8

Add whitespace before a parenthesis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57430 91177308-0d34-0410-b5e6-96231b3b80d8

Add a note on llvmc2 plugins + remove some trailing whitespace (my Emacs does this automatically).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57429 91177308-0d34-0410-b5e6-96231b3b80d8

calls can be supported.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57428 91177308-0d34-0410-b5e6-96231b3b80d8

more notes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57427 91177308-0d34-0410-b5e6-96231b3b80d8

Change TAG_ names to DW_TAG for gcc (testsuite) compatibility.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57425 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug in live-in detection that caused lost-copy problems to show up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57424 91177308-0d34-0410-b5e6-96231b3b80d8

add some more notes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57423 91177308-0d34-0410-b5e6-96231b3b80d8

this was to be removed after 2.4 branched.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57422 91177308-0d34-0410-b5e6-96231b3b80d8

Remove "long" variants so these will pass on a 64-bit host.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57418 91177308-0d34-0410-b5e6-96231b3b80d8

add some notes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57416 91177308-0d34-0410-b5e6-96231b3b80d8

Update size of inst correctly with segment override.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57414 91177308-0d34-0410-b5e6-96231b3b80d8

Add special-case code to allow null-guards on calls to malloc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57413 91177308-0d34-0410-b5e6-96231b3b80d8

Make Escape Analysis work for any pointer.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57412 91177308-0d34-0410-b5e6-96231b3b80d8

Add EscapeAnalysis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57411 91177308-0d34-0410-b5e6-96231b3b80d8

Change Dwarf comments starting with AT_ to DW_AT_ to
match gcc.  Helps with the testsuite.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57410 91177308-0d34-0410-b5e6-96231b3b80d8

Fix crashes and infinite loops.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57408 91177308-0d34-0410-b5e6-96231b3b80d8

Duncan convinced me that it's not possible to transform control-based escapes into
data-based ones.  Just be conservative when analyzing control-based escapes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57400 91177308-0d34-0410-b5e6-96231b3b80d8

fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57388 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR2697 by rewriting the '(X / pos) op neg' logic.  This also changes
a couple other cases for clarity, but shouldn't affect correctness.

Patch by Eli Friedman!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57387 91177308-0d34-0410-b5e6-96231b3b80d8

update win32 project file, patch provided by OvermindDL1 on llvmdev.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57386 91177308-0d34-0410-b5e6-96231b3b80d8

Change CALLSEQ_BEGIN and CALLSEQ_END to take TargetConstant's as
parameters instead of raw Constants.  This prevents the constants from
being selected by the isel pass, fixing PR2735.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57385 91177308-0d34-0410-b5e6-96231b3b80d8

rearrange some code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57384 91177308-0d34-0410-b5e6-96231b3b80d8

random cleanup

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57383 91177308-0d34-0410-b5e6-96231b3b80d8

Add API changes which affected me to release notes:
 - DbgStopPointInst
 - Attributes (needs filling in)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57382 91177308-0d34-0410-b5e6-96231b3b80d8

Fix comment typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57381 91177308-0d34-0410-b5e6-96231b3b80d8