Calling RemoveOperand is very expensive on huge PHI instructions. This makes
early tail duplication run twice as fast on the Firefox JavaScript
interpreter.

llvm-svn: 95832

This makes early tail duplication run 60 times faster when compiling the Firefox
JavaScript interpreter, see PR6186.

llvm-svn: 95831

llvm-svn: 95828

lowering and requires that certain types exist in ValueTypes.h.  Modified widening to
check if an op can trap and if so, the widening algorithm will apply only the op on
the defined elements.  It is safer to do this in widening because the optimizer can't
guarantee removing unused ops in some cases.

llvm-svn: 95823

llvm-svn: 95819

legalization even when the IR-level optimizer has removed dead phis, such
as when the high half of an i64 value is unused on a 32-bit target.
I had to adjust a few test cases that had dead phis.
This is a partial fix for Radar 7627077.

llvm-svn: 95816

llvm-svn: 95814

the pointer values could be invalid.

llvm-svn: 95813

changed its behavior.  Oops.

llvm-svn: 95811

code with lots of bitfields.

llvm-svn: 95809

llvm-svn: 95807

x86_32-encoding.s in on expectation of it passing.

llvm-svn: 95806

llvm-svn: 95801

The "uses=" comments are just clutter in this context.

llvm-svn: 95799

to be printed, in place of the familiar "uses=" comments.

llvm-svn: 95798

different word was intended.

llvm-svn: 95795

llvm-svn: 95784

llvm-svn: 95781

displacement values.

llvm-svn: 95773

throughout the X86 encoder.

llvm-svn: 95771

even for the immediate case.  No functionality change.

llvm-svn: 95770

pointer type.

llvm-svn: 95769

MCInst it came from.

llvm-svn: 95767

Now that ShrinkDemandedOps() is separated out from DAG combine. It sometimes leave some obvious nops which dag combine used to clean up afterwards e.g. (trunk (ext n)) -> n. Look for them and squash them.

llvm-svn: 95757

Also, fix a silly memory leak.

llvm-svn: 95752

llvm-svn: 95749

llvm-svn: 95748

llvm-svn: 95747

llvm-svn: 95746

llvm-svn: 95745

llvm-svn: 95742

llvm-svn: 95740

register coalescing.  This fixes many crashes and
places where debug info affects codegen (when
dbg.value is lowered to machine instructions, which
it isn't yet in TOT).

llvm-svn: 95739

The major win of this is that the code is simpler and they 
print on the same line as the instruction again:

        movl    %eax, 96(%esp)          ## 4-byte Spill
        movl    96(%esp), %eax          ## 4-byte Reload
        cmpl    92(%esp), %eax          ## 4-byte Folded Reload
        jl      LBB7_86

llvm-svn: 95738

llvm-svn: 95737

llvm-svn: 95736

the field from being used uninitialized later in some cases.

llvm-svn: 95735

OutStreamer.AddBlankLine instead of textually.

llvm-svn: 95734

IntegerValType holds a uint32_t, so its constructor should take a uint32_t.  This allows it to be properly initialized with bit widths > 65535

llvm-svn: 95731

llvm-svn: 95730