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Add some more immediate patterns. This allows us to compile: 

void test6() {
  Y = 0xABCD0123BCDE4567;
}

into:

_test6:
        lis r2, -21555
        lis r3, ha16(_Y)
        ori r2, r2, 291
        rldicr r2, r2, 32, 31
        oris r2, r2, 48350
        ori r2, r2, 17767
        std r2, lo16(_Y)(r3)
        blr

llvm-svn: 28885
This commit is contained in:
Chris Lattner 2006-06-20 23:03:01 +00:00
parent 9834ad2fc6
commit d881f8257b
1 changed files with 30 additions and 0 deletions
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30
llvm/lib/Target/PowerPC/PPCInstr64Bit.td
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@ -215,6 +215,17 @@ def FCTIDZ : XForm_26<63, 815, (ops F8RC:$frD, F8RC:$frB),
// Instruction Patterns
//
def HI32_48 : SDNodeXForm<imm, [{
// Transformation function: shift the immediate value down into the low bits.
return getI32Imm((unsigned short)(N->getValue() >> 32));
}]>;
def HI48_64 : SDNodeXForm<imm, [{
// Transformation function: shift the immediate value down into the low bits.
return getI32Imm((unsigned short)(N->getValue() >> 48));
}]>;
// Immediate support.
// Handled above:
// sext(0x0000_0000_0000_FFFF, i8) -> li imm
@ -234,6 +245,25 @@ def zext_0x0000_0000_FFFF_7FFF_i16 : PatLeaf<(imm), [{
def : Pat<(i64 zext_0x0000_0000_FFFF_7FFF_i16:$imm),
(ORIS8 (LI8 (LO16 imm:$imm)), (HI16 imm:$imm))>;
// zext(0x0000_0000_FFFF_FFFF, i16) -> oris (ori (li 0), lo16(imm)), imm>>16
def zext_0x0000_0000_FFFF_FFFF_i16 : PatLeaf<(imm), [{
return (N->getValue() & 0xFFFFFFFF00000000ULL) == 0;
}]>;
def : Pat<(i64 zext_0x0000_0000_FFFF_FFFF_i16:$imm),
(ORIS8 (ORI8 (LI8 0), (LO16 imm:$imm)), (HI16 imm:$imm))>;
// Fully general (and most expensive: 6 instructions!) immediate pattern.
def : Pat<(i64 imm:$imm),
(ORI8
(ORIS8
(RLDICR
(ORI8
(LIS8 (HI48_64 imm:$imm)),
(HI32_48 imm:$imm)),
32, 31),
(HI16 imm:$imm)),
(LO16 imm:$imm))>;
// Extensions and truncates to/from 32-bit regs.