llvm-svn: 37407

llvm-svn: 37406

llvm-svn: 37405

llvm-svn: 37404

llvm-svn: 37403

llvm-svn: 37402

There's no need to have an Expression class... Value works just as well!  This simplifies a lot of code.

llvm-svn: 37401

switches.  There is one really easy isel thing here with tst we are not
getting.

llvm-svn: 37400

(landing pad) when an exception unwinds through the call.  This doesn't
quite match the way the dwarf unwinder works: by default it only jumps to
the landing pad if the catch or filter specification matches, and otherwise
it keeps on unwinding.  There are two ways of specifying to the unwinder
that it should "always" (more on why there are quotes here later) jump to
the landing pad: follow the specification by a 0 typeid, or follow it by
the typeid for the NULL typeinfo.  GCC does the first, and this patch makes
LLVM do the same as gcc.  However there is a problem: the unwinder performs
optimizations based on C++ semantics (it only expects destructors to be
run if the 0 typeid fires - known as "cleanups"), meaning it assumes that no
exceptions will be raised and that the raised exception will be reraised
at the end of the cleanup code.  So if someone writes their own LLVM code
using the exception intrinsics they will get a nasty surprise if they don't
follow these rules.  The other possibility of using the typeid corresponding
to NULL (catch-all) causes the unwinder to make no assumptions, so this is
probably what we should use in the long-run.  However since we are still
having trouble getting exception handling working properly, for the moment
it seems best to closely imitate GCC.

llvm-svn: 37399

simplifies the code in DwarfWriter, allows for multiple filters and
makes it trivial to specify filters accompanied by cleanups or catch-all
specifications (see next patch).  What a deal!  Patch blessed by Anton.

llvm-svn: 37398

llvm-svn: 37397

llvm-svn: 37394

llvm-svn: 37393

See test/CodeGen/X86/test-pic-jtbl.ll for a case where it works well;
shaves another 10K off our favorite benchmark.  I was hesitant about
this because of compile speed, but seems to do OK on a bootstrap.

llvm-svn: 37392

Avoid overwriting the APInt instance with 0 bytes which causes the bitwidth
to be set to 0 (illegal) producing a subsequent assert.

llvm-svn: 37391

llvm-svn: 37390

llvm-svn: 37389

llvm-svn: 37388

llvm-svn: 37387

llvm-svn: 37386

llvm-svn: 37385

as a null i8 pointer not as a 0 i32.

llvm-svn: 37383

Ifcvt triangle: don't ifcvt 'true' BB if it has other predecessors; don't merge 'false' BB if it has other predecessors.

llvm-svn: 37382

llvm-svn: 37381

Remove a bogus check. Even terminators in a ifcvt need to be predicated. Unconditional branches can usually be converted to conditional ones.

llvm-svn: 37380

llvm-svn: 37379

llvm-svn: 37376

Do not remove empty landing pads (EH table needs to be updated)

llvm-svn: 37375

llvm-svn: 37374

smaller than the preferred alignment, but so that the target can actually
specify a minimum alignment if needed.  This fixes some objc protocol
failures Devang tracked down.

llvm-svn: 37373

When a function has FP, the register scavenging spill slot offset already
was calculated.

llvm-svn: 37371

llvm-svn: 37366

llvm-svn: 37365

llvm-svn: 37362

llvm-svn: 37360

half of PR1421, by not decimating structs with holes that are the source and
destination of a memcpy.

llvm-svn: 37358

llvm-svn: 37355

matter until my last change).  Reenable tail merging by default.

llvm-svn: 37354

llvm-svn: 37353

For VFP2 fldm, fstm instructions, the condition code is printed after the address mode and size specifier. e.g. fstmiaseq, not fstmeqias.

llvm-svn: 37351