Prepare for building from llvm-top. Unfortunately, this doesn't work because
of the cyclic depndency between llvm and llvm-gcc-4-0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39910 91177308-0d34-0410-b5e6-96231b3b80d8

Repair a regression in Transforms/InstCombine/mul.ll that Reid noticed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39896 91177308-0d34-0410-b5e6-96231b3b80d8

rename function to avoid llvm-upgrade warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39895 91177308-0d34-0410-b5e6-96231b3b80d8

Start adding and cleaning up comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39894 91177308-0d34-0410-b5e6-96231b3b80d8

Handle decrementing loops properly. Fixes PR1533.

Always pass the constant as the second parameter to HowManyLessThans.

Remove obsolete "isSigned" parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39893 91177308-0d34-0410-b5e6-96231b3b80d8

add a helper method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39885 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39882 91177308-0d34-0410-b5e6-96231b3b80d8

Implement shift-simplify.ll:test[45].

First teach instcombine that sign bit checks only demand the
sign bit, this allows simplify demanded bits to hack on
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39880 91177308-0d34-0410-b5e6-96231b3b80d8

Implement shift-simplify.ll:test3, turning:
(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39879 91177308-0d34-0410-b5e6-96231b3b80d8

Clarify the language. Pointed out by Duncan Sands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39857 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the build. Patch from Holger Schurig.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39856 91177308-0d34-0410-b5e6-96231b3b80d8

Long live the exception handling!

This patch fills the last necessary bits to enable exceptions
handling in LLVM. Currently only on x86-32/linux.

In fact, this patch adds necessary intrinsics (and their lowering) which
represent really weird target-specific gcc builtins used inside unwinder.

After corresponding llvm-gcc patch will land (easy) exceptions should be
more or less workable. However, exceptions handling support should not be
thought as 'finished': I expect many small and not so small glitches
everywhere.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39855 91177308-0d34-0410-b5e6-96231b3b80d8

Use maximal intersection algorithm exclusively. Fixes miscompile bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39852 91177308-0d34-0410-b5e6-96231b3b80d8

Add alternate ConstantRange intersection algorithm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39851 91177308-0d34-0410-b5e6-96231b3b80d8

Added test case from PR1540.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39845 91177308-0d34-0410-b5e6-96231b3b80d8

Make LCSSA a loop pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39844 91177308-0d34-0410-b5e6-96231b3b80d8

Fix for PR1540: Specify F0, F1 are sub-registers of D0, etc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39843 91177308-0d34-0410-b5e6-96231b3b80d8

Handle GEPs with all-zero indices in the same way we handle pointer-pointer bitcasts. Also, fix a potentia infinite loop.

This brings FastDSE to parity with old DSE on 175.vpr.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39839 91177308-0d34-0410-b5e6-96231b3b80d8

Disable claims to preserve analysis until open issues are resolved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39834 91177308-0d34-0410-b5e6-96231b3b80d8

Eliminate an unused parameter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39828 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the comment for LegalizeOp to more accurately reflect what it does.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39827 91177308-0d34-0410-b5e6-96231b3b80d8

remove obsolete note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39825 91177308-0d34-0410-b5e6-96231b3b80d8

Don't call SimplifyVBinOp for non-vector operations, following earlier review
feedback. This theoretically makes the common (scalar) case more efficient.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39823 91177308-0d34-0410-b5e6-96231b3b80d8

fix some bugs in the manual

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39822 91177308-0d34-0410-b5e6-96231b3b80d8

Be more aggressive in removing dead stores, and in removing instructions trivially dead after DSE.
This drastically improves the effect of FastDSE on kimwitu++.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39819 91177308-0d34-0410-b5e6-96231b3b80d8

Modify previous patch per review comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39817 91177308-0d34-0410-b5e6-96231b3b80d8

Skeleton of post-RA scheduler; doesn't do anything yet.
Change name of -sched option and DEBUG_TYPE to
pre-RA-sched; adjust testcases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39816 91177308-0d34-0410-b5e6-96231b3b80d8

Fix CodeGen/Generic/print-arith-fp.ll on sparc (PR1551)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39813 91177308-0d34-0410-b5e6-96231b3b80d8

these tests do not need a triple on Solaris. Thanks sabre!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39803 91177308-0d34-0410-b5e6-96231b3b80d8

Regenerate to pick up Gabor's changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39802 91177308-0d34-0410-b5e6-96231b3b80d8

Set the mime-type of this file to text/plain because (silly) SVN
doesn't know that application/x-sh is text.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39801 91177308-0d34-0410-b5e6-96231b3b80d8

* llvm.spec.in: update blurb
* autoconf/AutoRegen.sh: use variables for autofoo versions
* autoconf/configure.ac: test for some more functions
                         that are not guaranteed on solaris

Note: the svn:mime-type of autoconf/AutoRegen.sh
      should be set to something that allows for
text compares using svn diff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39800 91177308-0d34-0410-b5e6-96231b3b80d8

Reimplement removing stores to allocas at the end of a function.  This should be safe now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39790 91177308-0d34-0410-b5e6-96231b3b80d8

Make the condition-checking for free with non-trivial dependencies more correct.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39789 91177308-0d34-0410-b5e6-96231b3b80d8

Remove the end-block handling code.  It was unsafe, and making it safe would have resulted in falling back to the slow DSE case.  I need to think some more about the right way to handle this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39788 91177308-0d34-0410-b5e6-96231b3b80d8

ARM:  make branch folder remove unconditional branches
following jump tables that it earlier inserted.  This
would be OK on other targets but is needed for correctness
only on ARM (constant islands needs to find jump tables).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39782 91177308-0d34-0410-b5e6-96231b3b80d8

The type ids making up a filter are unsigned, and
should be output as unsigned values.  Checked against
gcc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39775 91177308-0d34-0410-b5e6-96231b3b80d8

checked in as obvious,
thanks Benoit Boissinot!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39774 91177308-0d34-0410-b5e6-96231b3b80d8

fix the remaining 3 testcases that missed a target triple

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39773 91177308-0d34-0410-b5e6-96231b3b80d8

another missed SSE optimization

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39772 91177308-0d34-0410-b5e6-96231b3b80d8

Let MemoryDependenceAnalysis take care of updating AliasAnalysis.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39769 91177308-0d34-0410-b5e6-96231b3b80d8

New test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39768 91177308-0d34-0410-b5e6-96231b3b80d8

Preserve analysis info.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39767 91177308-0d34-0410-b5e6-96231b3b80d8

Get rid of annoying spaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39766 91177308-0d34-0410-b5e6-96231b3b80d8

Added support for Mips specific GAS directives
Fixed print immediate
Fixed Identation on MipsISelDAGToDAG.cpp

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39764 91177308-0d34-0410-b5e6-96231b3b80d8

Added support for framepointer
Prologue/Epilogue support fp,ra save/restore and use the stack frame the right
way!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39763 91177308-0d34-0410-b5e6-96231b3b80d8

Handle the case where an entire structure is freed, and its dependency is a store to a field within
that structure.

Also, refactor the runOnBasicBlock() function, splitting some of the special cases into separate functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39762 91177308-0d34-0410-b5e6-96231b3b80d8

Now that stack is represented the right way, LOA starts at 0

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39761 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed AddLiveOut issues
FI's created the write way to represent Mips stack

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39760 91177308-0d34-0410-b5e6-96231b3b80d8

Removed unused immediate PatLeaf, fixed lui instruction

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39759 91177308-0d34-0410-b5e6-96231b3b80d8

Added MipsMachineFunction class, to hold Mips dinamic stack info when inserting Prologue/Epilog

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39758 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for eliminate stores to stack-allocated memory locations at the end
of a function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39754 91177308-0d34-0410-b5e6-96231b3b80d8

Handle eliminating stores that occur right before a free.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39753 91177308-0d34-0410-b5e6-96231b3b80d8

Handle packed structs in the CBackend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39752 91177308-0d34-0410-b5e6-96231b3b80d8

Emit correct linkage. Patch by Roman Samoilov.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39751 91177308-0d34-0410-b5e6-96231b3b80d8

Add test case for PR1545.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39749 91177308-0d34-0410-b5e6-96231b3b80d8

Missed a couple of places where new instructions are added due to spill / restore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39748 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up a few things based on Chris' feedback.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39747 91177308-0d34-0410-b5e6-96231b3b80d8

Adding ability to demote phi to stack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39744 91177308-0d34-0410-b5e6-96231b3b80d8

Fix hang compiling TimberWolf (allow for islands
of size other than 4).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39743 91177308-0d34-0410-b5e6-96231b3b80d8

Assert when TLS is not implemented.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39737 91177308-0d34-0410-b5e6-96231b3b80d8

Exception handling has been implemented.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39732 91177308-0d34-0410-b5e6-96231b3b80d8

Fix an oversight: for modules with no other identifying target info,
the sparc backend should be preferred when running on sparcs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39142 91177308-0d34-0410-b5e6-96231b3b80d8

If assertions are not enabled, we should return False here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38535 91177308-0d34-0410-b5e6-96231b3b80d8

No longer need to track last def / use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38534 91177308-0d34-0410-b5e6-96231b3b80d8

Fix for PR1545: Revamp code that update kill information due to register reuse.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38525 91177308-0d34-0410-b5e6-96231b3b80d8

Adjust this per the changes to the configuration script in the llvm-top module.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38521 91177308-0d34-0410-b5e6-96231b3b80d8

Add FastDSE, a new algorithm for doing dead store elimination.  This algorithm is not as accurate
as the current DSE, but it only a linear scan over each block, rather than quadratic.  Eventually
(once it has been improved somewhat), this will replace the current DSE.

NOTE: This has not yet been extensively tested.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38517 91177308-0d34-0410-b5e6-96231b3b80d8

Make this work with GLIBCXX_DEBUG.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38516 91177308-0d34-0410-b5e6-96231b3b80d8

Didn't mean the last commit. Revert.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38515 91177308-0d34-0410-b5e6-96231b3b80d8

Fix fp_constant_op failure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38514 91177308-0d34-0410-b5e6-96231b3b80d8

Update.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38513 91177308-0d34-0410-b5e6-96231b3b80d8

fix 80 columnn violations, increasing the world's
pedantic satisfaction level.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38512 91177308-0d34-0410-b5e6-96231b3b80d8

Calculate the size of a array allocation correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38511 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a crasher when finding the dependency of a call.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38510 91177308-0d34-0410-b5e6-96231b3b80d8

Make this pass registration static as well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38509 91177308-0d34-0410-b5e6-96231b3b80d8

Make the pass registration static.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38508 91177308-0d34-0410-b5e6-96231b3b80d8

add a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38507 91177308-0d34-0410-b5e6-96231b3b80d8

check for correct usage of the byval attribute

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38506 91177308-0d34-0410-b5e6-96231b3b80d8

During module cloning copy aliases too. This fixes PR1544

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38505 91177308-0d34-0410-b5e6-96231b3b80d8

Handle vaarg instructions correctly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38504 91177308-0d34-0410-b5e6-96231b3b80d8

Change the peep for EXTRACT_VECTOR_ELT of BUILD_PAIR to look for
the new CONCAT_VECTORS node type instead, as that's what legalize
uses now. And add a peep for EXTRACT_VECTOR_ELT of INSERT_VECTOR_ELT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38503 91177308-0d34-0410-b5e6-96231b3b80d8

Volatile loads and stores depend on each other.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38502 91177308-0d34-0410-b5e6-96231b3b80d8

Remove clobbersPred. Add an OptionalDefOperand to instructions which have the 's' bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38501 91177308-0d34-0410-b5e6-96231b3b80d8

Remove clobbersPred.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38500 91177308-0d34-0410-b5e6-96231b3b80d8

Add OptionalDefOperand. Remove clobbersPred. Also add DefinesPredicate to be used by if-converter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38499 91177308-0d34-0410-b5e6-96231b3b80d8

Try committing again. Add OptionalDefOperand. Remove clobbersPred.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38498 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for finding the dependencies of call and invoke instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38497 91177308-0d34-0410-b5e6-96231b3b80d8

If the operand is marked M_OPTIONAL_DEF_OPERAND, then it's a def.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38496 91177308-0d34-0410-b5e6-96231b3b80d8

Somehow this wasn't committed last time. M_CLOBBERS_PRED is gone.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38495 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the build, and fix the handling of pointer sizes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38494 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bunch of things from Chris' feedback

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38493 91177308-0d34-0410-b5e6-96231b3b80d8

Add a regression test for folding spill code into scalar min and max.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38492 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug in the folding of binary operators to undef.
Thanks to Lauro for spotting this!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38491 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to keep symbols for profile build.

Patch by Benoit Boissinot. Thanks, Benoit!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38490 91177308-0d34-0410-b5e6-96231b3b80d8

Fix the folding of undef in several binary operators to recognize
undef in either the left or right operand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38489 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the handling of the --*flags options. The makefile already gets it
right so there is no need to duplicate logic, just use the values the makefile
provides.

Eliminate some redundnt -D options from the output.

Fix the help output so it fits on 80 cols.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38488 91177308-0d34-0410-b5e6-96231b3b80d8

Makesure the -cppflags also uses the CPP.BaseFlags as the CPP.Defines only
contains some of the defines but not all CPP flags.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38487 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure that preprocessor symbols like _DEBUG, NDEBUG, and _GLIBC_DEBUG are
put into the CPP.Defines variable. Seems the convention was corrupted with
various changes made. It is important to get command line parameters into the
right variable because things like llvm-config and sub-makefiles depend on it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38486 91177308-0d34-0410-b5e6-96231b3b80d8

When a node value is only used by a CopyToReg, use the user's dest. This should not be restricted to nodes that produce only a single value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38485 91177308-0d34-0410-b5e6-96231b3b80d8