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

This REALLY should be lowered by the legalizer!

llvm-svn: 22941

llvm-svn: 22935

llvm-svn: 22929

llvm-svn: 22926

llvm-svn: 22913

instruction.

llvm-svn: 22901

llvm-svn: 22889

passed.

llvm-svn: 22886

llvm-svn: 22884

the operand lists of a few other nodes.

llvm-svn: 22883

llvm-svn: 22882

llvm-svn: 22877

llvm-svn: 22870

llvm-svn: 22869

llvm-svn: 22866

as the argument to LIS rather than the result of HA16(constant).

The DAG->DAG ISel was already doing the right thing.

llvm-svn: 22865

Now for int foo() { return -1; } we generate:
_foo:
        li r3, -1
        blr

instead of
_foo:
        lis r2, -1
        ori r3, r2, 65535
        blr

llvm-svn: 22864

to make the code follow people's expectations better.

llvm-svn: 22861

llvm-svn: 22858

llvm-svn: 22857

llvm-svn: 22855

llvm-svn: 22854

llvm-svn: 22851

llvm-svn: 22850

llvm-svn: 22849

llvm-svn: 22848

several of the PowerPC opcodes that come in both negated and non-negated
forms.

llvm-svn: 22845

llvm-svn: 22837

incomplete, but it is a start.  It handles basic argument/retval stuff, immediates,
add and sub.

llvm-svn: 22836

llvm-svn: 22835

selector.  Also, there is no difference between addSImm and addImm, so just
use addImm, folding some branches.

llvm-svn: 22819

llvm-svn: 22818