is used by the int -> FP code among other things.  This gets
2005-05-12-Int64ToFP past that failure, to dying on lack of support for add_parts

llvm-svn: 23042

llvm-svn: 23038

around to functions and stuff

llvm-svn: 23036

llvm-svn: 23034

to codegen this: float foo() { return 1.245; }

into this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs f1, lo16(.CPI_foo_0)(r2)
        blr

instead of this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs r2, lo16(.CPI_foo_0)(r2)   <-- ouch
        or f1, r2, r2                  <-- ouch
        blr

with the dag isel.

llvm-svn: 23033

llvm-svn: 23032

llvm-svn: 23031

llvm-svn: 23030

llvm-svn: 23029

instructions take a consistent reg class.  Implement ISD::UNDEF in the dag->dag
selector to generate this, fixing UnitTests/2003-07-06-IntOverflow.

llvm-svn: 23028

llvm-svn: 23026

Emit the indcall sequence as:

mtctr inreg
mr R12, inreg
btctr

If inreg and R12 aren't coallesced, this reduces the odds of having the mtctr
and btctr in the same dispatch group.  :)

llvm-svn: 23023

llvm-svn: 23020

llvm-svn: 23010

target independent code in SelectionDAG.cpp

llvm-svn: 23002

Prefer 'neg X' to 'subfic 0, X' since neg does not set XER[CA]

llvm-svn: 23001

Prefer 'neg X' to 'subfic 0, X' since it does not set XER[CA]

llvm-svn: 23000

Call stil not supported yet

llvm-svn: 22998

llvm-svn: 22991

llvm-svn: 22988

x%y for 'rem' on fp values.

llvm-svn: 22984

llvm-svn: 22982

llvm-svn: 22981

llvm-svn: 22979

llvm-svn: 22976

llvm-svn: 22975

in the asmprinter.  This changes the .td files to use lower case register names,
avoiding the need to do this call.  This speeds up the asmprinter from 1.52s
to 1.06s on kc++ in a release build.

llvm-svn: 22974

It used to crash on any function that took float arguments.

llvm-svn: 22973

llvm-svn: 22970

llvm-svn: 22963

float %test2(float* %P) {
        %Q = load float* %P
        %R = add float %Q, %Q
        ret float %R
}

By returning the right result.

llvm-svn: 22961

Make sure expressions only have one use before emitting them into a place that is conditionally executed

llvm-svn: 22960

llvm-svn: 22959

llvm-svn: 22953

simplifies BRTWOWAY into BR if one of the results is a fall-through.
Unless I'm missing something, there is no reason to duplicate this
in the target-specific code.

llvm-svn: 22952

llvm-svn: 22951

it in the block.  This codegens:

int %test(bool %c) {
        %retval = select bool %c, int 17, int 1
        ret int %retval
}

as:

_test:
        rlwinm r2, r3, 0, 31, 31
        li r2, 17
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        li r2, 1
.LBB_test_2:    ;
        or r3, r2, r2
        blr

instead of:

_test:
        rlwinm r2, r3, 0, 31, 31
        li r2, 17
        li r4, 1
        cmpwi cr0, r3, 0
        bne .LBB_test_2 ;
.LBB_test_1:    ;
        or r2, r4, r4
.LBB_test_2:    ;
        or r3, r2, r2
        blr

... which is one fewer instruction.  The savings are more significant for
global address and constantfp nodes.

llvm-svn: 22946

llvm-svn: 22944

llvm-svn: 22942

This REALLY should be lowered by the legalizer!

llvm-svn: 22941