the correct register class. Also remove the loading of float data into int
regs part of varargs; it will need to be implemented differently later.
llvm-svn: 20857
1) dynamic stack alloc
2) loads
3) shifts
4) subtract
5) immediate form of add, and, or, xor
6) change flag from -pattern-isel to -enable-ppc-pattern-isel
Remove dead arguments from getGlobalBaseReg in the simple ISel
llvm-svn: 20810
to save and restore the LR register on entry and exit of a leaf function
that needed to access globals or the constant pool. This should hopefully
fix oscar from sending the PPC tester spinning out of control.
llvm-svn: 20197
- unsigned TrueValue = getReg(TrueVal, BB, BB->begin());
+ unsigned TrueValue = getReg(TrueVal);
Fixes the PPC regressions from last night.
The other hunk is just a clarity improvement.
llvm-svn: 19263
While we're at it, improve codegen of select instructions. For this
testcase:
int %test(bool %C, int %A, int %B) {
%D = select bool %C, int %A, int %B
ret int %D
}
We used to generate this code:
_test:
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
b .LBB_test_3 ;
.LBB_test_2: ;
or r5, r4, r4
.LBB_test_3: ;
or r3, r5, r5
blr
Now we emit:
_test:
cmpwi cr0, r3, 0
bne .LBB_test_2 ;
.LBB_test_1: ;
or r4, r5, r5
.LBB_test_2: ;
or r3, r4, r4
blr
-Chris
llvm-svn: 19214
addi r3, r3, -1
instead of
addi r3, r3, 1
for 'sub int X, 1'.
Secondarily, this fixes several cases where we could crash given an unsigned
constant. And fixes a couple of minor missed optimization cases, such as
xor X, ~0U -> not X
llvm-svn: 18379
place to help bring up the PowerPC back end on Darwin. This code is no
longer serves any purpose now that the AsmPrinter does the right thing
all the time printing GlobalValues. --Cruft.
llvm-svn: 18267
static global variables whose addresses are taken. This allows us to
convert the following code for taking the address of a static function foo
addis r2, r30, ha16(Ll1__2E_foo_2$non_lazy_ptr-"L00001$pb")
lwz r3, lo16(Ll1__2E_foo_2$non_lazy_ptr-"L00001$pb")(r2)
which also includes linker stub code emitted at the end of the .s file not
shown here, and replace it with this:
addis r2, r30, ha16(l1__2E_foo_2-"L00001$pb")
la r3, lo16(l1__2E_foo_2-"L00001$pb")(r2)
which in addition to not needing linker help, also has no load instruction.
For those not up on PowerPC mnemonics, la is shorthand for add immediate.
llvm-svn: 18239
