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[XCore] Add ISel pattern for LDWCP 

Patch by Robert Lytton.

llvm-svn: 185518
This commit is contained in:
Richard Osborne 2013-07-03 07:48:50 +00:00
parent 6c7ac57235
commit a1cff61dec
2 changed files with 16 additions and 8 deletions
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15
llvm/lib/Target/XCore/XCoreInstrInfo.td
View File

@ -279,12 +279,6 @@ multiclass FRU6_LRU6_backwards_branch<bits<6> opc, string OpcStr> {
!strconcat(OpcStr, " $a, $b"), []>;
}
multiclass FRU6_LRU6_cp<bits<6> opc, string OpcStr> {
def _ru6: _FRU6<opc, (outs RRegs:$a), (ins i32imm:$b),
!strconcat(OpcStr, " $a, cp[$b]"), []>;
def _lru6: _FLRU6<opc, (outs RRegs:$a), (ins i32imm:$b),
!strconcat(OpcStr, " $a, cp[$b]"), []>;
}
// U6
multiclass FU6_LU6<bits<10> opc, string OpcStr, SDNode OpNode> {
@ -539,8 +533,13 @@ def STWDP_lru6 : _FLRU6<0b010100, (outs), (ins RRegs:$a, i32imm:$b),
[(store RRegs:$a, (dprelwrapper tglobaladdr:$b))]>;
//let Uses = [CP] in ..
let mayLoad = 1, isReMaterializable = 1, neverHasSideEffects = 1 in
defm LDWCP : FRU6_LRU6_cp<0b011011, "ldw">;
let mayLoad = 1, isReMaterializable = 1, neverHasSideEffects = 1 in {
def LDWCP_ru6 : _FRU6<0b011011, (outs RRegs:$a), (ins i32imm:$b),
"ldw $a, cp[$b]", []>;
def LDWCP_lru6: _FLRU6<0b011011, (outs RRegs:$a), (ins i32imm:$b),
"ldw $a, cp[$b]",
[(set RRegs:$a, (load (cprelwrapper tglobaladdr:$b)))]>;
}
let Uses = [SP] in {
let mayStore=1 in {

9
llvm/test/CodeGen/XCore/load.ll
View File

@ -39,3 +39,12 @@ entry:
%2 = zext i8 %1 to i32
ret i32 %2
}
@GConst = external constant i32
define i32 @load_cp() nounwind {
entry:
; CHECK: load_cp:
; CHECK: ldw r0, cp[GConst]
%0 = load i32* @GConst
ret i32 %0
}