Added regression that breaks gcc4 build

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28358 91177308-0d34-0410-b5e6-96231b3b80d8

Should pass by reference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28357 91177308-0d34-0410-b5e6-96231b3b80d8

Another entry

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28356 91177308-0d34-0410-b5e6-96231b3b80d8

Add a note about a note

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28355 91177308-0d34-0410-b5e6-96231b3b80d8

Make PPC call lowering more aggressive, making the isel matching code simple
enough to be autogenerated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28354 91177308-0d34-0410-b5e6-96231b3b80d8

Another typo. Pointed out by Nate Begeman.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28353 91177308-0d34-0410-b5e6-96231b3b80d8

Fixed a LowerCallTo and LowerArguments bug. They were introducing illegal
VBIT_VECTOR nodes. There were some confusion about the semantics of
getPackedTypeBreakdown(). e.g. for <4 x f32> it returns 1 and v4f32, not 4,
and f32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28352 91177308-0d34-0410-b5e6-96231b3b80d8

Fix an obvious bug in getPackedTypeBreakdown. Return 1 if type is legal.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28351 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a mis-leading comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28350 91177308-0d34-0410-b5e6-96231b3b80d8

Add a CloneModule call that exposes the mapping of values from the old module
to the new module.  Patch provided by Nick Lewycky!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28349 91177308-0d34-0410-b5e6-96231b3b80d8

When we legalize target nodes, do not use getNode to create a new node,
use UpdateNodeOperands to just update the operands!  This is important because
getNode will allocate a new node if the node returns a flag and this breaks
assumptions in the legalizer that you can legalize some things multiple times
and get exactly the same results.

This latent bug was exposed by my ppc patch last night, and this fixes
gsm/toast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28348 91177308-0d34-0410-b5e6-96231b3b80d8

Add an assertion, avoid some unneeded work for each call.  No functionality
change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28347 91177308-0d34-0410-b5e6-96231b3b80d8

Switch PPC over to a call-selection model where the lowering code creates
the copyto/fromregs instead of making the PPCISD::CALL selection code create
them.  This vastly simplifies the selection code, and moves the ABI handling
parts into one place.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28346 91177308-0d34-0410-b5e6-96231b3b80d8

add an external symbol testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28345 91177308-0d34-0410-b5e6-96231b3b80d8

new test for various forms of calls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28344 91177308-0d34-0410-b5e6-96231b3b80d8

test for support to pass/return vectors to calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28343 91177308-0d34-0410-b5e6-96231b3b80d8

3 changes, 2 of which are cleanup one of which changes codegen:

1. Rearrange code a bit so that the special case doesn't require indenting lots
   of code.
2. Add comments describing PPC calling convention.
3. Only round up to 56-bytes of stack space for an outgoing call if the callee
   is varargs.  This saves a bit of stack space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28342 91177308-0d34-0410-b5e6-96231b3b80d8

implement passing/returning vector regs to calls, at least non-varargs calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28341 91177308-0d34-0410-b5e6-96231b3b80d8

Add support for calls that pass and return legal vectors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28340 91177308-0d34-0410-b5e6-96231b3b80d8

Instead of implementing LowerCallTo directly, let the default impl produce an
ISD::CALL node, then custom lower that.  This means that we only have to handle
LEGAL call operands/results, not every possible type.  This allows us to
simplify the call code, shrinking it by about 1/3.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28339 91177308-0d34-0410-b5e6-96231b3b80d8

Add a new ISD::CALL node, make the default impl of TargetLowering::LowerCallTo
produce it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28338 91177308-0d34-0410-b5e6-96231b3b80d8

Add a new CALL node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28337 91177308-0d34-0410-b5e6-96231b3b80d8

There is now a default impl of this method

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28336 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the argument counting logic by only incrementing the index.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28335 91177308-0d34-0410-b5e6-96231b3b80d8

Simplify the dead argument handling code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28334 91177308-0d34-0410-b5e6-96231b3b80d8

Vector args passed in registers don't reserve stack space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28333 91177308-0d34-0410-b5e6-96231b3b80d8

Another testcase that shouldn't need vrsave twiddling

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28332 91177308-0d34-0410-b5e6-96231b3b80d8

Switch the PPC backend over to using FORMAL_ARGUMENTS for formal argument
handling.  This makes the lower argument code significantly simpler (we
only need to handle legal argument types).

Incidentally, this also implements support for vector argument registers,
so long as they are not on the stack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28331 91177308-0d34-0410-b5e6-96231b3b80d8

this should be 128 I think

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28330 91177308-0d34-0410-b5e6-96231b3b80d8

Move this code to a common place

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28329 91177308-0d34-0410-b5e6-96231b3b80d8

Remove this xfail-d test, which doesn't make any sense

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28328 91177308-0d34-0410-b5e6-96231b3b80d8

Implement the custom lowering hook right, returning values for all of the
arguments at once.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28327 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug I introduced yesterday, which broke functions with *no* arguments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28326 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure to default ${prefix} to /usr/local if the user didn't specify it.
This assists with getting around configure's late binding values so that
our LLVM variables don't end up with a "NONE" prefix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28325 91177308-0d34-0410-b5e6-96231b3b80d8

X86 integer register classes naming changes. Make them consistent with FP, vector classes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28324 91177308-0d34-0410-b5e6-96231b3b80d8

Allow patterns to refer to physical registers that belong to multiple
register classes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28323 91177308-0d34-0410-b5e6-96231b3b80d8

Make sure that $(CXX.Flags) is passed to the linker so that the same options
with which source is compiled are used when linking. This matters when a
project is using the LLVM makefiles and overrides CXXFLAGS to specify new
flags to use.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28322 91177308-0d34-0410-b5e6-96231b3b80d8

Make this print the right start pointer

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28321 91177308-0d34-0410-b5e6-96231b3b80d8

Add a chain to FORMAL_ARGUMENTS.  This is a minimal port of the X86 backend,
it doesn't currently use/maintain the chain properly.  Also, make the
X86ISelLowering.cpp file 80-col clean.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28320 91177308-0d34-0410-b5e6-96231b3b80d8

Add a chain to FORMAL_ARGUMENTS.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28319 91177308-0d34-0410-b5e6-96231b3b80d8

Replace "../whatever.td" with "whatever.td", so that out-of-tree backends
can just add lib/Target to TableGen includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28318 91177308-0d34-0410-b5e6-96231b3b80d8

For PR778:
Improve doxygenification of this header file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28317 91177308-0d34-0410-b5e6-96231b3b80d8

When linking, make sure the project libraries are linked before the LLVM
libraries. This ensures that the project's libraries (which most likely
depend on LLVM libraries) come first on the command line and can thus be
resolved by the LLVM libraries that appear later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28316 91177308-0d34-0410-b5e6-96231b3b80d8

Move function-live-in-handling code from the sdisel code to the scheduler.
This code should be emitted after legalize, so it can't be in sdisel.

Note that the EmitFunctionEntryCode hook should be updated to operate on the
DAG.  The X86 backend is the only one currently using this hook.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28315 91177308-0d34-0410-b5e6-96231b3b80d8

Print the vreg that livein physregs are live in

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28314 91177308-0d34-0410-b5e6-96231b3b80d8

Legalize FORMAL_ARGUMENTS nodes correctly, we don't want to legalize them once
for each argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28313 91177308-0d34-0410-b5e6-96231b3b80d8

Add my homepage, as a test that commit access works

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28312 91177308-0d34-0410-b5e6-96231b3b80d8

Fit in 80 cols

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28311 91177308-0d34-0410-b5e6-96231b3b80d8

add an abort after every assert(0)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28310 91177308-0d34-0410-b5e6-96231b3b80d8

For PR777:
Add an additional catch block to ensure that this function can't throw any
exceptions, even one's we're not expecting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28309 91177308-0d34-0410-b5e6-96231b3b80d8

Upgrade in preparation for doxygen 1.4.4. The config file format changed,
there are new/different css styles to support, and the footer was woefully
out of date.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28308 91177308-0d34-0410-b5e6-96231b3b80d8

Improve comment, patch provided by Vladimir Prus!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28307 91177308-0d34-0410-b5e6-96231b3b80d8

Update dox, patch by Vladimir Prus!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28306 91177308-0d34-0410-b5e6-96231b3b80d8

Improve comments, patch provided by Vladimir Prus!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28305 91177308-0d34-0410-b5e6-96231b3b80d8

Doxygenify the comments, bringing the file level comments down to be attached
with the class that it documents. Patch suggested by Vladimir Prus.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28304 91177308-0d34-0410-b5e6-96231b3b80d8

Remove some dead code, identified by coverity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28303 91177308-0d34-0410-b5e6-96231b3b80d8

Add myself to the credits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28302 91177308-0d34-0410-b5e6-96231b3b80d8

added a skeleton of the ARM backend

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28301 91177308-0d34-0410-b5e6-96231b3b80d8

added myself to CREDITS.TXT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28300 91177308-0d34-0410-b5e6-96231b3b80d8

Free memory allocated by copy_env.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28299 91177308-0d34-0410-b5e6-96231b3b80d8

print a nice error if bugpoint gets an error reading inputs.  Bug identified
by coverity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28298 91177308-0d34-0410-b5e6-96231b3b80d8

Fix a bug found by inspection.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28297 91177308-0d34-0410-b5e6-96231b3b80d8

improve comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28296 91177308-0d34-0410-b5e6-96231b3b80d8

Catch a potentially thrown exception.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28295 91177308-0d34-0410-b5e6-96231b3b80d8

Improve documentation on throwing, it is not complete still though. :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28294 91177308-0d34-0410-b5e6-96231b3b80d8

LoadLibraryPermanently can theoretically throw an exception.  Do not propagate
it out of 'ExecutionEngine::create'.  This fixes a problem reported by coverity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28293 91177308-0d34-0410-b5e6-96231b3b80d8

Bug noticed, by inspection.  Filename can be null.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28292 91177308-0d34-0410-b5e6-96231b3b80d8

This function is not documented as throwing an exception and callers don't
handle it.  Just silently fail.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28291 91177308-0d34-0410-b5e6-96231b3b80d8

inverted logic, caught by coverity

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28290 91177308-0d34-0410-b5e6-96231b3b80d8

remove some dead code identified by coverity

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28289 91177308-0d34-0410-b5e6-96231b3b80d8

Delete memory allocated by CopyEnv

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28288 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead var

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28287 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead variables

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28286 91177308-0d34-0410-b5e6-96231b3b80d8

Change token to match asmprinter output

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28285 91177308-0d34-0410-b5e6-96231b3b80d8

Backing out last check-in for now. It's causing an infinite loop gccas lencode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28284 91177308-0d34-0410-b5e6-96231b3b80d8

Update comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28283 91177308-0d34-0410-b5e6-96231b3b80d8

This is a proper fix for the compiler warning.  A termination condition is
not needed, as it can never be reached: an edge must exist.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28282 91177308-0d34-0410-b5e6-96231b3b80d8

Fix an infinite loop bug that Vladimir Prus identified.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28281 91177308-0d34-0410-b5e6-96231b3b80d8

Add a #include <cassert> for situations where Casting.h is used standalone.
Patch contributed by Vladimir Prus.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28280 91177308-0d34-0410-b5e6-96231b3b80d8

Fixing 2006-05-01-SchedCausingSpills.ll; some clean up

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28279 91177308-0d34-0410-b5e6-96231b3b80d8

Revert an un-intended change

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28278 91177308-0d34-0410-b5e6-96231b3b80d8

Don't try to reference uninitialized data. Make sure we can find "nm".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28277 91177308-0d34-0410-b5e6-96231b3b80d8

For PR741:
Update documentation to reflect current LLVM reality:
  + LLVMAlpha.o, LLVMIA64.o
  - Skeleton, execve, ProfilePaths
Also, regenerate the library dependency information.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28276 91177308-0d34-0410-b5e6-96231b3b80d8

Add/Sub/Mul are safe to promote here as well.  Incrementing a single-bit
bitfield now gives this code:

_plus:
        lwz r2, 0(r3)
        rlwimi r2, r2, 0, 1, 31
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of this:

_plus:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        slwi r4, r4, 31
        addis r4, r4, -32768
        rlwimi r2, r4, 0, 0, 0
        stw r2, 0(r3)
        blr

this can obviously still be improved.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28275 91177308-0d34-0410-b5e6-96231b3b80d8

Merge identical code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28274 91177308-0d34-0410-b5e6-96231b3b80d8

Implement simple promotion for cast elimination in instcombine.  This is
currently very limited, but can be extended in the future.  For example,
we now compile:

uint %test30(uint %c1) {
        %c2 = cast uint %c1 to ubyte
        %c3 = xor ubyte %c2, 1
        %c4 = cast ubyte %c3 to uint
        ret uint %c4
}

to:

_xor:
        movzbl 4(%esp), %eax
        xorl $1, %eax
        ret

instead of:

_xor:
        movb $1, %al
        xorb 4(%esp), %al
        movzbl %al, %eax
        ret

More impressively, we now compile:

struct B { unsigned bit : 1; };
void xor(struct B *b) { b->bit = b->bit ^ 1; }

To (X86/PPC):

_xor:
        movl 4(%esp), %eax
        xorl $-2147483648, (%eax)
        ret
_xor:
        lwz r2, 0(r3)
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of (X86/PPC):

_xor:
        movl 4(%esp), %eax
        movl (%eax), %ecx
        movl %ecx, %edx
        shrl $31, %edx
        # TRUNCATE movb %dl, %dl
        xorb $1, %dl
        movzbl %dl, %edx
        andl $2147483647, %ecx
        shll $31, %edx
        orl %ecx, %edx
        movl %edx, (%eax)
        ret

_xor:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        xori r4, r4, 1
        rlwimi r2, r4, 31, 0, 0
        stw r2, 0(r3)
        blr

This implements InstCombine/cast.ll:test30.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28273 91177308-0d34-0410-b5e6-96231b3b80d8

New testcase for instcombine

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28272 91177308-0d34-0410-b5e6-96231b3b80d8

Remove some dead variables.

Fix a nasty bug in the memcmp optimizer where we used the wrong variable!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28269 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead stuff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28268 91177308-0d34-0410-b5e6-96231b3b80d8

Fix build breakage :(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28267 91177308-0d34-0410-b5e6-96231b3b80d8

More coverity fixes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28266 91177308-0d34-0410-b5e6-96231b3b80d8

Dead variable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28265 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead var, fix bad override.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28264 91177308-0d34-0410-b5e6-96231b3b80d8

Don't use old-style casts. This prevents compiler warnings when CommandLine.h
is used in projects that have stricter warning control than LLVM. This also
helps us find casts more easily if we ever need to.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28263 91177308-0d34-0410-b5e6-96231b3b80d8

If the register allocator cannot find a register to spill, try the aliases. If
that still fails (because all the register spill weights are inf), just grab
one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28262 91177308-0d34-0410-b5e6-96231b3b80d8

Remove dead code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28261 91177308-0d34-0410-b5e6-96231b3b80d8

Fix accidentally committed patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28260 91177308-0d34-0410-b5e6-96231b3b80d8

Actually override the right method. :)

Bug identified by coverity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28259 91177308-0d34-0410-b5e6-96231b3b80d8

remove dead variable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28258 91177308-0d34-0410-b5e6-96231b3b80d8

Fix iterator invalidation bug, identified by Coverity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28257 91177308-0d34-0410-b5e6-96231b3b80d8