CALL ... %RAX<imp-def>
   ... [not using %RAX]
   %EAX = ..., %RAX<imp-use, kill>
   RET %EAX<imp-use,kill>

Now we do this:

   CALL ... %RAX<imp-def, dead>
   ... [not using %RAX]
   %EAX = ...
   RET %EAX<imp-use,kill>

By not artificially keeping %RAX alive, we lower register pressure a bit.

The correct number of instructions for 2008-08-05-SpillerBug.ll is obviously
55, anybody can see that. Sheesh.

llvm-svn: 97838

post-ra scheduler has run. Disable the verifier checks that late in the game.

llvm-svn: 97837

llvm-svn: 97836

llvm-svn: 97835

llvm-svn: 97834

llvm-svn: 97831

llvm-svn: 97830

Safely turn memset_chk etc. to non-chk variant if the known object size is >= memset / memcpy / memmove size.

llvm-svn: 97828

llvm-svn: 97827

scope instead of error, PR6517

llvm-svn: 97826

llvm-svn: 97818

of label error to a warning controllable with a -W flag.

llvm-svn: 97815

llvm-svn: 97814

from different addr spaces.

llvm-svn: 97813

llvm-svn: 97810

llvm-svn: 97809

The MicroBlaze backend was generating stack layouts that did not
conform correctly to the ABI. This update generates stack layouts
which are closer to what GCC does.

Variable arguments support was added as well but the stack layout
for varargs has not been finalized.

llvm-svn: 97807

llvm-svn: 97806

parts of the cmp|cmp and cmp&cmp folding logic wasn't prepared for vectors
(unrelated to the bug but noticed while in the code) and the code was 
*definitely* not safe to use by the (cast icmp)|(cast icmp) handling logic
that I added in r95855.  Fix all this up by changing the various routines
to more consistently use IRBuilder and not pass in the I which had the wrong 
type.

llvm-svn: 97801

llvm-svn: 97799

llvm-svn: 97798

Fix an oops in x86 sibcall optimization. If the ByVal callee argument is itself passed as a pointer, then it's obviously not safe to do a tail call.

llvm-svn: 97797

llvm-svn: 97796

compares, noticed by inspection.

llvm-svn: 97795

in a very specific use pattern embodied in the carefully
reduced testcase.

llvm-svn: 97794

No functionality change.

llvm-svn: 97793

llvm-svn: 97792

node which has a flag.  That flag in turn was used by an
already-selected adde which turned into an ADC32ri8 which
used a selected load which was chained to the load we
folded.  This flag use caused us to form a cycle.  Fix
this by not ignoring chains in IsLegalToFold even in
cases where the isel thinks it can.

llvm-svn: 97791

llvm-svn: 97790

llvm-svn: 97789

llvm-svn: 97788

As in 'llvmc -O2 -O2 test.c'.

llvm-svn: 97787

Allows us to find executables that are in the same directory.

llvm-svn: 97786

information in ExplodedNode.

llvm-svn: 97785

llvm-svn: 97782

llvm-svn: 97781

llvm-svn: 97780

llvm-svn: 97779

rounding correctly. This implementation is a generalization of
the x86_64 code in compiler-rt.

This fixes rdar://7683708.

llvm-svn: 97778

test case.

llvm-svn: 97777