Fix PR590 and Transforms/Mem2Reg/2005-06-30-ReadBeforeWrite.ll.

The optimization for locally used allocas was not safe for allocas that
were read before they were written.  This change disables that optimization
in that case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22318 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR590

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22317 91177308-0d34-0410-b5e6-96231b3b80d8

Make the x86 asm printer darwin-aware.  This mostly entails doing the same
thing as cygwin most of the time, and printing our alignments in log2
rather than number of bytes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22316 91177308-0d34-0410-b5e6-96231b3b80d8

restore old srcValueNode behavior and try to to work around it

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22315 91177308-0d34-0410-b5e6-96231b3b80d8

Don't crash on a query where the block is not in any loop.  Thanks to
Sameer D. Sahasrabuddhe for pointing this out!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22314 91177308-0d34-0410-b5e6-96231b3b80d8

Bug fixed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22313 91177308-0d34-0410-b5e6-96231b3b80d8

Doh!  Forgot to LLVMify the style.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22312 91177308-0d34-0410-b5e6-96231b3b80d8

tracking the instructions causing loads and stores provides more information than just the pointer being loaded or stored

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22311 91177308-0d34-0410-b5e6-96231b3b80d8

Basic fix for PR#591; don't convert an fprintf() to an fwrite() if there
is a mismatch in their character type pointers (i.e. fprintf() prints an
array of ubytes while fwrite() takes an array of sbytes).
We can probably do better than this (such as casting the ubyte to an
sbyte).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22310 91177308-0d34-0410-b5e6-96231b3b80d8

thinko

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22309 91177308-0d34-0410-b5e6-96231b3b80d8

unify SelectExpr and SelectFP

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22308 91177308-0d34-0410-b5e6-96231b3b80d8

fix most regressions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22307 91177308-0d34-0410-b5e6-96231b3b80d8

support more relocations for stores also

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22306 91177308-0d34-0410-b5e6-96231b3b80d8

Get rid of all symbolic loads.  I now do gernate all relocations sequences
rather than relying on the assembler.  Only a few more pseudo instructions
left.  Also merge load code paths.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22305 91177308-0d34-0410-b5e6-96231b3b80d8

Add ElfWriter stuff to Visual Studio

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22304 91177308-0d34-0410-b5e6-96231b3b80d8

some call work

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22303 91177308-0d34-0410-b5e6-96231b3b80d8

Adapt the code for handling uint -> fp conversion for the 32 bit case to
handling it in the 64 bit case.  The two code paths should probably be merged.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22302 91177308-0d34-0410-b5e6-96231b3b80d8

So, it turns out I forgot that one valid way of restoring GP after a call
is to use RA, which assumes the called function uses RA for the register
holding the return address when it issues a ret.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22301 91177308-0d34-0410-b5e6-96231b3b80d8

Initial set of .td file changes necessary to get scalar fp in xmm registers
working.  The instruction selector changes will hopefully be coming later
this week once they are debugged.  This is necessary to support the darwin
x86 FP model, and is recommended by intel as the replacement for x87.  As
a bonus, the register allocator knows how to deal with these registers
across basic blocks, unliky the FP stackifier.  This leads to significantly
better codegen in several cases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22300 91177308-0d34-0410-b5e6-96231b3b80d8

get rid of another pseudo op

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22299 91177308-0d34-0410-b5e6-96231b3b80d8

generate address of constant pool entries

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22298 91177308-0d34-0410-b5e6-96231b3b80d8

Misha happification patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22297 91177308-0d34-0410-b5e6-96231b3b80d8

Reduce use of pseudo ops
Namely, output the rellocation flags explicitly when loading constants.
Added benifit: save a load when loading from the constant pool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22296 91177308-0d34-0410-b5e6-96231b3b80d8

missed a load

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22295 91177308-0d34-0410-b5e6-96231b3b80d8

make constant pool labels local

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22294 91177308-0d34-0410-b5e6-96231b3b80d8

who said we had to use the return address in the return address register.  Might save a move in many cases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22293 91177308-0d34-0410-b5e6-96231b3b80d8

Add support to the X86 backend for emitting ELF files.  To use this, we
currently use: llc t.bc --filetype=obj

This will produce a t.o file which is dumpable with readelf.  Currently
the file produced is empty, but the scaffolding to do more is now in place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22292 91177308-0d34-0410-b5e6-96231b3b80d8

iniital checkin of ELFWriter implementation

For now, the elf writer is only capable of emitting an empty elf file, with
a section table and a section table string table.  This will be enhanced
in the future :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22291 91177308-0d34-0410-b5e6-96231b3b80d8

iniital checkin of ELFWriter header.

For now, the elf writer is only capable of emitting an empty elf file, with
a section table and a section table string table.  This will be enhanced
in the future :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22290 91177308-0d34-0410-b5e6-96231b3b80d8

depend more on legalize putting constants on the RHS

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22289 91177308-0d34-0410-b5e6-96231b3b80d8

With setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand), Legalize
should be able to handle this case.  The code is there, so let's see
if it works.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22288 91177308-0d34-0410-b5e6-96231b3b80d8

add a new -filetype argument to llc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22287 91177308-0d34-0410-b5e6-96231b3b80d8

add some new file types

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22286 91177308-0d34-0410-b5e6-96231b3b80d8

minor cleanups, use copy ctor instead of manually doing it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22285 91177308-0d34-0410-b5e6-96231b3b80d8

refactor this interface

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22284 91177308-0d34-0410-b5e6-96231b3b80d8

Refactor the addPassesToEmitAssembly interface into a addPassesToEmitFile
interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22282 91177308-0d34-0410-b5e6-96231b3b80d8

refactor these interfaces a bit

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22281 91177308-0d34-0410-b5e6-96231b3b80d8

improve comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22280 91177308-0d34-0410-b5e6-96231b3b80d8

Fix grammar

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22279 91177308-0d34-0410-b5e6-96231b3b80d8

add a note about variable length array

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22278 91177308-0d34-0410-b5e6-96231b3b80d8

add a debug type

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22277 91177308-0d34-0410-b5e6-96231b3b80d8

remove a pseudo instruction, make ret always right, and fix vararg chains

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22276 91177308-0d34-0410-b5e6-96231b3b80d8

finally, Working varargs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22275 91177308-0d34-0410-b5e6-96231b3b80d8

more complete Lowering for vacopy and vaarg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22274 91177308-0d34-0410-b5e6-96231b3b80d8

If we support structs as va_list, we must pass pointers to them to va_copy
See last commit for LangRef, this implements it on all targets.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22273 91177308-0d34-0410-b5e6-96231b3b80d8

SelectionDAG is very unhappy when the argument to an intrinsic is a struct

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22272 91177308-0d34-0410-b5e6-96231b3b80d8

Make it easier to find alpha stuff in doxygen, and fixup labeling
of memory instructions in the assembly, to allow later linking
of traces with LLVM Value*s.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22271 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed indentation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22270 91177308-0d34-0410-b5e6-96231b3b80d8

because some functions just use va_start and pass things to vfprintf

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22269 91177308-0d34-0410-b5e6-96231b3b80d8

the correct fix was to fix AliasAnalysis.getModRefInfo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22268 91177308-0d34-0410-b5e6-96231b3b80d8

make AliasAnalysis know that VAArg writes memory.  This is extremely conservative and should be fixed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22267 91177308-0d34-0410-b5e6-96231b3b80d8

prevent GCSE from forwarding stores to loads around vaarg.  This is uggly, and I am trying to fix the AliasInfo, as it should catch the problem instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22266 91177308-0d34-0410-b5e6-96231b3b80d8

prevent va_arg from being hoisted from a loop

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22265 91177308-0d34-0410-b5e6-96231b3b80d8

fix DCE + va_arg problem

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22264 91177308-0d34-0410-b5e6-96231b3b80d8

prevent DCE of vaarg intrinsics.  This should take care of most regressions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22263 91177308-0d34-0410-b5e6-96231b3b80d8

va_end fix

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22262 91177308-0d34-0410-b5e6-96231b3b80d8

so this doesn't crash when run.  It is hard to tell if things are right enough to work correctly with all the TmpInstructions running around

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22261 91177308-0d34-0410-b5e6-96231b3b80d8

add a check for the mixing of vaarg and vanext with va_arg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22260 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore the configure.out file generated by "make reconfigure"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22259 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore some generated files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22258 91177308-0d34-0410-b5e6-96231b3b80d8

Ignore generated files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22257 91177308-0d34-0410-b5e6-96231b3b80d8

Fix this test case to actually test the new va_arg instruction not the
old vaarg instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22256 91177308-0d34-0410-b5e6-96231b3b80d8

OK, at least get rid of old stuff, and mark what needs to be fixed for V9

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22255 91177308-0d34-0410-b5e6-96231b3b80d8

core changes for varargs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22254 91177308-0d34-0410-b5e6-96231b3b80d8

header file changes for varargs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22253 91177308-0d34-0410-b5e6-96231b3b80d8

new vararg test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22252 91177308-0d34-0410-b5e6-96231b3b80d8

OK, after checking the backwards compatibility code on X86 and the new code
path on alpha, now has come the time for new vararg support.  So, with out
further ado, I revert behavior back a couple of years!

Well, ok, I lied.  A few more notes.

First, the Simple ISels cannot be expected to work any longer, but they
should still compile

Second, there are likely some bugs to track down once the nightly testers
start with this.

Third, the initial patch doesn't include sparcv9, but I'll do that today.

Forth, subsequent patches won't bother being long winded.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22251 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a problem with the strcmp optimization checking the wrong string and
not casting to the correct type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22250 91177308-0d34-0410-b5e6-96231b3b80d8

Clean up some uninitialized variables and missing return statements that
GCC 4.0.0 compiler (sometimes incorrectly) warns about under release build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22249 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure a variable is initialized before use to clean up a warning from
GCC 4.0.0 in release build.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22248 91177308-0d34-0410-b5e6-96231b3b80d8

A start at a Sparc V8 Pattern ISel.  Anyone want to implement the calling
convention? ;)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22247 91177308-0d34-0410-b5e6-96231b3b80d8

silence incredibly braindead GCC 4 warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22246 91177308-0d34-0410-b5e6-96231b3b80d8

silence a bogus warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22245 91177308-0d34-0410-b5e6-96231b3b80d8

silence a huge number of bogus warnings with GCC 4 on Reid's tester.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22244 91177308-0d34-0410-b5e6-96231b3b80d8

Removed IIIi specific changes. This should be fixed to add floating point deps for the IIi.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22243 91177308-0d34-0410-b5e6-96231b3b80d8

Special dep graph for SMS for superblocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22242 91177308-0d34-0410-b5e6-96231b3b80d8

Special versions of the dep graph and scheduled for SMS for superblocks.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22241 91177308-0d34-0410-b5e6-96231b3b80d8

Added statistic to count number of spills.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22240 91177308-0d34-0410-b5e6-96231b3b80d8

Numerous bug fixes and the completed modschedSB algorithm (minor bugs still exist for course).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22239 91177308-0d34-0410-b5e6-96231b3b80d8

Added SMS for superblocks as an option (experimental)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22238 91177308-0d34-0410-b5e6-96231b3b80d8

Added ModuloSchedSB as a friend class.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22237 91177308-0d34-0410-b5e6-96231b3b80d8

This is not true: (X != 13 | X < 15) -> X < 15

It is actually always true.  This fixes PR586 and
Transforms/InstCombine/2005-06-16-SetCCOrSetCCMiscompile.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22236 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR586

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22235 91177308-0d34-0410-b5e6-96231b3b80d8

Don't crash when dealing with INTMIN.  This fixes PR585 and
Transforms/InstCombine/2005-06-16-RangeCrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22234 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR585

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22233 91177308-0d34-0410-b5e6-96231b3b80d8

Don't crash on:  X = phi (X, X).

This fixes PR584 and Transforms/SimplifyCFG/2005-06-16-PHICrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22232 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR584

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22231 91177308-0d34-0410-b5e6-96231b3b80d8

avoid constructing out of range shift amounts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22230 91177308-0d34-0410-b5e6-96231b3b80d8

Fix bug 537 test 2, which checks to make sure that we fold A+(B-A) -> B for
integer types.  Add a couple checks to not perform these kinds of transform
on floating point values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22228 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR583 and testcase Transforms/InstCombine/2005-06-15-DivSelectCrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22227 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR583

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22226 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR571, removing code that does just the WRONG thing :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22225 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug in my previous patch.  Do not get the shift amount type (which
is always ubyte, get the type being shifted).  This unbreaks espresso

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22224 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR575, patch provided by John Mellor-Crummey.  Thanks!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22223 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR580

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22222 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR582.  The rewriter can move casts around, which invalidated the
BB iterator.  This fixes Transforms/IndVarsSimplify/2005-06-15-InstMoveCrash.ll

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22221 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR582

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22220 91177308-0d34-0410-b5e6-96231b3b80d8

Do not promote globals only used by main to locals if there are constantexprs
or other uses hanging off of them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22219 91177308-0d34-0410-b5e6-96231b3b80d8

new testcase for PR579

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22218 91177308-0d34-0410-b5e6-96231b3b80d8

Fix PR577 and testcase InstCombine/2005-06-15-ShiftSetCCCrash.ll.
Do not perform undefined out of range shifts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22217 91177308-0d34-0410-b5e6-96231b3b80d8