As a bonus, use the GOT node instead of the AlphaISD::GOT for internal stuff.

llvm-svn: 30873

llvm-svn: 30872

The dag/inst combiners often 'simplify' the masked value based on whether
or not the bits are live or known zero/one.  This is good and dandy, but
often causes special case patterns to fail, such as alpha's CMPBGE pattern,
which looks like "(set GPRC:$RC, (setuge (and GPRC:$RA, 255), (and GPRC:$RB, 255)))".
Here the pattern for (and X, 255) should match actual dags like (and X, 254) if
the dag combiner proved that the missing bits are already zero (one for 'or').

For CodeGen/Alpha/cmpbge.ll:test2 for example, this results in:

        sll $16,1,$0
        cmpbge $0,$17,$0
        ret $31,($26),1

instead of:

        sll $16,1,$0
        and $0,254,$0
        and $17,255,$1
        cmpule $1,$0,$0
        ret $31,($26),1

... and requires no target-specific code.

llvm-svn: 30871

the second has an and of 254 not 255.

llvm-svn: 30870

llvm-svn: 30869

identical, this is just a refactoring.

llvm-svn: 30868

llvm-svn: 30867

llvm-svn: 30866

llvm-svn: 30865

llvm-svn: 30864

Domagoj Babic, thanks!

llvm-svn: 30863

llvm-svn: 30862

llvm-svn: 30861

llvm-svn: 30860

llvm-svn: 30859

llvm-svn: 30858

llvm-svn: 30857

llvm-svn: 30856

llvm-svn: 30855

llvm-svn: 30854

llvm-svn: 30853

llvm-svn: 30852

See comment in CanBeFoldedBy() for detailed explanation.

llvm-svn: 30851

llvm-svn: 30850

llvm-svn: 30849

folding first.

llvm-svn: 30848

llvm-svn: 30847

llvm-svn: 30846

code. This is especially important now matching ISD::LOAD also requires a
Predicate_Load call.

llvm-svn: 30845

llvm-svn: 30844

Chain and address ptr remains as operands. SrcValue, extending mode, extending
VT (or rather loaded VT before extension) are now instance variables of
LoadSDNode.

Introduce load / store addressing modes to represent pre- and post-indexed
load and store. Also added an additional operand offset that is only used in
post-indexed mode (i.e. base ptr += offset after load/store).

Added alignment info (not yet used) and isVolatile fields.

llvm-svn: 30843

llvm-svn: 30842

llvm-svn: 30841

llvm-svn: 30840

llvm-svn: 30839

llvm-svn: 30838

llvm-svn: 30837

llvm-svn: 30835

The result of yyparse() was not being checked. When YYERROR or YYABORT is
called it causes yyparse() to return 1 to indicate the error. The code was
silently ignoring this situation because it previously expected either an
exception or a null ParserResult to indicate an error. The patch corrects
this situation.

llvm-svn: 30834

llvm-svn: 30833