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Sparc: Add support for indirect branch and blockaddress in Sparc backend.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183094 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju 2013-06-03 05:58:33 +00:00
parent 891c0cd3c1
commit e7cbb792c9
5 changed files with 114 additions and 0 deletions
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3
lib/Target/Sparc/SparcAsmPrinter.cpp
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@ -120,6 +120,9 @@ void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
case MachineOperand::MO_GlobalAddress:
O << *Mang->getSymbol(MO.getGlobal());
break;
case MachineOperand::MO_BlockAddress:
O << GetBlockAddressSymbol(MO.getBlockAddress())->getName();
break;
case MachineOperand::MO_ExternalSymbol:
O << MO.getSymbolName();
break;

13
lib/Target/Sparc/SparcISelLowering.cpp
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@ -1258,6 +1258,7 @@ SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
setOperationAction(ISD::GlobalAddress, getPointerTy(), Custom);
setOperationAction(ISD::GlobalTLSAddress, getPointerTy(), Custom);
setOperationAction(ISD::ConstantPool, getPointerTy(), Custom);
setOperationAction(ISD::BlockAddress, getPointerTy(), Custom);
// Sparc doesn't have sext_inreg, replace them with shl/sra
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
@ -1460,6 +1461,12 @@ SDValue SparcTargetLowering::withTargetFlags(SDValue Op, unsigned TF,
CP->getAlignment(),
CP->getOffset(), TF);
if (const BlockAddressSDNode *BA = dyn_cast<BlockAddressSDNode>(Op))
return DAG.getTargetBlockAddress(BA->getBlockAddress(),
Op.getValueType(),
0,
TF);
if (const ExternalSymbolSDNode *ES = dyn_cast<ExternalSymbolSDNode>(Op))
return DAG.getTargetExternalSymbol(ES->getSymbol(),
ES->getValueType(0), TF);
@ -1530,6 +1537,11 @@ SDValue SparcTargetLowering::LowerConstantPool(SDValue Op,
return makeAddress(Op, DAG);
}
SDValue SparcTargetLowering::LowerBlockAddress(SDValue Op,
SelectionDAG &DAG) const {
return makeAddress(Op, DAG);
}
static SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
SDLoc dl(Op);
// Convert the fp value to integer in an FP register.
@ -1752,6 +1764,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const {
case ISD::GlobalTLSAddress:
llvm_unreachable("TLS not implemented for Sparc.");
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);

1
lib/Target/Sparc/SparcISelLowering.h
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@ -120,6 +120,7 @@ namespace llvm {
SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) const;
SDValue LowerBlockAddress(SDValue Op, SelectionDAG &DAG) const;
unsigned getSRetArgSize(SelectionDAG &DAG, SDValue Callee) const;
SDValue withTargetFlags(SDValue Op, unsigned TF, SelectionDAG &DAG) const;

20
lib/Target/Sparc/SparcInstrInfo.td
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@ -516,6 +516,20 @@ let isBarrier = 1 in
"ba $dst",
[(br bb:$dst)]>;
//Indirect Branch
let isTerminator = 1, isBarrier = 1,
hasDelaySlot = 1, isBranch =1,
isIndirectBranch = 1 in {
def BINDrr : F3_1<2, 0b111000,
(outs), (ins MEMrr:$ptr),
"jmp $ptr",
[(brind ADDRrr:$ptr)]>;
def BINDri : F3_2<2, 0b111000,
(outs), (ins MEMri:$ptr),
"jmp $ptr",
[(brind ADDRri:$ptr)]>;
}
// FIXME: the encoding for the JIT should look at the condition field.
let Uses = [ICC] in
def BCOND : BranchSP<0, (ins brtarget:$dst, CCOp:$cc),
@ -793,9 +807,15 @@ def : Pat<(SPlo tglobaladdr:$in), (ORri (i32 G0), tglobaladdr:$in)>;
def : Pat<(SPhi tconstpool:$in), (SETHIi tconstpool:$in)>;
def : Pat<(SPlo tconstpool:$in), (ORri (i32 G0), tconstpool:$in)>;
// Blockaddress
def : Pat<(SPhi tblockaddress:$in), (SETHIi tblockaddress:$in)>;
def : Pat<(SPlo tblockaddress:$in), (ORri (i32 G0), tblockaddress:$in)>;
// Add reg, lo. This is used when taking the addr of a global/constpool entry.
def : Pat<(add iPTR:$r, (SPlo tglobaladdr:$in)), (ADDri $r, tglobaladdr:$in)>;
def : Pat<(add iPTR:$r, (SPlo tconstpool:$in)), (ADDri $r, tconstpool:$in)>;
def : Pat<(add iPTR:$r, (SPlo tblockaddress:$in)),
(ADDri $r, tblockaddress:$in)>;
// Calls:
def : Pat<(call tglobaladdr:$dst),

77
test/CodeGen/SPARC/blockaddr.ll Normal file
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@ -0,0 +1,77 @@
; RUN: llc < %s -march=sparc -relocation-model=static -code-model=small | FileCheck --check-prefix=abs32 %s
; RUN: llc < %s -march=sparcv9 -relocation-model=static -code-model=small | FileCheck --check-prefix=abs32 %s
; RUN: llc < %s -march=sparcv9 -relocation-model=static -code-model=medium | FileCheck --check-prefix=abs44 %s
; RUN: llc < %s -march=sparcv9 -relocation-model=static -code-model=large | FileCheck --check-prefix=abs64 %s
; RUN: llc < %s -march=sparc -relocation-model=pic -code-model=medium | FileCheck --check-prefix=v8pic32 %s
; RUN: llc < %s -march=sparcv9 -relocation-model=pic -code-model=medium | FileCheck --check-prefix=v9pic32 %s
;
; copied from test/CodeGen/Mips/blockaddr.ll and modified for SPARC
;
@reg = common global i8* null, align 4
define i8* @dummy(i8* %x) nounwind readnone noinline {
entry:
ret i8* %x
}
; abs32: func_block_addr:
; abs32: sethi %hi([[BLK:.+]]), [[R:%[gilo][0-7]]]
; abs32: call dummy
; abs32: add [[R]], %lo([[BLK]]), %o0
; abs32: jmp %o0
; abs44: func_block_addr:
; abs44: sethi %h44([[BLK:.+]]), [[R:%[gilo][0-7]]]
; abs44: add [[R]], %m44([[BLK]]), [[R1:%[gilo][0-7]]]
; abs44: sllx [[R1]], 12, [[R2:%[gilo][0-7]]]
; abs44: call dummy
; abs44: add [[R2]], %l44([[BLK]]), %o0
; abs44: jmp %o0
; abs64: func_block_addr:
; abs64: sethi %hi([[BLK:.+]]), [[R:%[gilo][0-7]]]
; abs64: add [[R]], %lo([[BLK]]), [[R1:%[gilo][0-7]]]
; abs64: sethi %hh([[BLK]]), [[R2:%[gilo][0-7]]]
; abs64: add [[R2]], %hm([[BLK]]), [[R3:%[gilo][0-7]]]
; abs64: sllx [[R3]], 32, [[R4:%[gilo][0-7]]]
; abs64: call dummy
; abs64: add [[R2]], [[R1]], %o0
; abs64: jmp %o0
; v8pic32: func_block_addr
; v8pic32: sethi %hi(_GLOBAL_OFFSET_TABLE_+{{.+}}), [[R:%[gilo][0-7]]]
; v8pic32: or [[R]], %lo(_GLOBAL_OFFSET_TABLE_+{{.+}}), [[R1:%[gilo][0-7]]]
; v8pic32: add [[R1]], %o7, %[[R2:[gilo][0-7]]]
; v8pic32: sethi %hi([[BLK:.+]]), [[R3:%[gilo][0-7]]]
; v8pic32: add [[R3]], %lo([[BLK]]), %[[R4:[gilo][0-7]]]
; v8pic32: call dummy
; v8pic32: ld [%[[R2]]+%[[R4]]], %o0
; v8pic32: jmp %o0
; v9pic32: func_block_addr
; v9pic32: sethi %hi(_GLOBAL_OFFSET_TABLE_+{{.+}}), [[R:%[gilo][0-7]]]
; v9pic32: or [[R]], %lo(_GLOBAL_OFFSET_TABLE_+{{.+}}), [[R1:%[gilo][0-7]]]
; v9pic32: add [[R1]], %o7, %[[R2:[gilo][0-7]]]
; v9pic32: sethi %hi([[BLK:.+]]), [[R3:%[gilo][0-7]]]
; v9pic32: add [[R3]], %lo([[BLK]]), %[[R4:[gilo][0-7]]]
; v9pic32: call dummy
; v9pic32: ldx [%[[R2]]+%[[R4]]], %o0
; v9pic32: jmp %o0
define void @func_block_addr() nounwind {
entry:
%call = tail call i8* @dummy(i8* blockaddress(@func_block_addr, %baz))
indirectbr i8* %call, [label %baz, label %foo]
foo: ; preds = %foo, %entry
store i8* blockaddress(@func_block_addr, %foo), i8** @reg, align 4
br label %foo
baz: ; preds = %entry
store i8* null, i8** @reg, align 4
ret void
}