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[PowerPC] Remove LE patterns matching generic stores/loads to VSX permuting ops

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This patch corresponds to:
https://reviews.llvm.org/D21409

The LXVD2X, LXVW4X, STXVD2X and STXVW4X instructions permute the two doublewords
in the vector register when in little-endian mode. Custom code ensures that the
necessary swaps are inserted for these. This patch simply removes the possibilty
that a load/store node will match one of these instructions in the SDAG as that
would not insert the necessary swaps.

llvm-svn: 282144
This commit is contained in:
Nemanja Ivanovic 2016-09-22 10:32:03 +00:00
parent a22f68829a
commit 90c1d15d13
1 changed files with 10 additions and 5 deletions
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15
lib/Target/PowerPC/PPCInstrVSX.td
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@ -131,10 +131,12 @@ let Uses = [RM] in {
[(store f64:$XT, xoaddr:$dst)]>;
let Predicates = [HasVSX, HasOnlySwappingMemOps] in {
// The behaviour of this instruction is endianness-specific so we provide no
// pattern to match it without considering endianness.
def STXVD2X : XX1Form<31, 972,
(outs), (ins vsrc:$XT, memrr:$dst),
"stxvd2x $XT, $dst", IIC_LdStSTFD,
[(store v2f64:$XT, xoaddr:$dst)]>;
[]>;
def STXVW4X : XX1Form<31, 908,
(outs), (ins vsrc:$XT, memrr:$dst),
@ -953,19 +955,22 @@ def : Pat<(v2f64 (PPCuvec2fp v4i32:$C, 1)),
// Loads.
let Predicates = [HasVSX, HasOnlySwappingMemOps] in {
def : Pat<(v2f64 (load xoaddr:$src)), (LXVD2X xoaddr:$src)>;
def : Pat<(v2i64 (load xoaddr:$src)), (LXVD2X xoaddr:$src)>;
def : Pat<(v4i32 (load xoaddr:$src)), (LXVW4X xoaddr:$src)>;
def : Pat<(v2f64 (PPClxvd2x xoaddr:$src)), (LXVD2X xoaddr:$src)>;
// Stores.
def : Pat<(int_ppc_vsx_stxvd2x v2f64:$rS, xoaddr:$dst),
(STXVD2X $rS, xoaddr:$dst)>;
def : Pat<(store v2i64:$rS, xoaddr:$dst), (STXVD2X $rS, xoaddr:$dst)>;
def : Pat<(int_ppc_vsx_stxvw4x v4i32:$rS, xoaddr:$dst),
(STXVW4X $rS, xoaddr:$dst)>;
def : Pat<(PPCstxvd2x v2f64:$rS, xoaddr:$dst), (STXVD2X $rS, xoaddr:$dst)>;
}
let Predicates = [IsBigEndian, HasVSX, HasOnlySwappingMemOps] in {
def : Pat<(v2f64 (load xoaddr:$src)), (LXVD2X xoaddr:$src)>;
def : Pat<(v2i64 (load xoaddr:$src)), (LXVD2X xoaddr:$src)>;
def : Pat<(v4i32 (load xoaddr:$src)), (LXVW4X xoaddr:$src)>;
def : Pat<(store v2f64:$rS, xoaddr:$dst), (STXVD2X $rS, xoaddr:$dst)>;
def : Pat<(store v2i64:$rS, xoaddr:$dst), (STXVD2X $rS, xoaddr:$dst)>;
}
// Permutes.
def : Pat<(v2f64 (PPCxxswapd v2f64:$src)), (XXPERMDI $src, $src, 2)>;