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Add support for the SPARC v9 abs44 code model.

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This is the default model for non-PIC 64-bit code. It supports
text+data+bss linked anywhere in the low 16 TB of the address space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179473 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-04-14 04:57:51 +00:00
parent cab0abd03d
commit 87ce01739b
3 changed files with 32 additions and 6 deletions
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22
lib/Target/Sparc/SparcISelLowering.cpp
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@ -1392,12 +1392,13 @@ SDValue SparcTargetLowering::makeHiLoPair(SDValue Op,
// Build SDNodes for producing an address from a GlobalAddress, ConstantPool,
// or ExternalSymbol SDNode.
SDValue SparcTargetLowering::makeAddress(SDValue Op, SelectionDAG &DAG) const {
DebugLoc DL = Op.getDebugLoc();
EVT VT = getPointerTy();
// Handle PIC mode first.
if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
// This is the pic32 code model, the GOT is known to be smaller than 4GB.
SDValue HiLo = makeHiLoPair(Op, SPII::MO_HI, SPII::MO_LO, DAG);
DebugLoc DL = Op.getDebugLoc();
EVT VT = getPointerTy();
SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, DL, VT);
SDValue AbsAddr = DAG.getNode(ISD::ADD, DL, VT, GlobalBase, HiLo);
return DAG.getLoad(VT, DL, DAG.getEntryNode(), AbsAddr,
@ -1405,10 +1406,19 @@ SDValue SparcTargetLowering::makeAddress(SDValue Op, SelectionDAG &DAG) const {
}
// This is one of the absolute code models.
assert(getTargetMachine().getCodeModel() == CodeModel::Small &&
"Only the abs32 code model is supported");
return makeHiLoPair(Op, SPII::MO_HI, SPII::MO_LO, DAG);
switch(getTargetMachine().getCodeModel()) {
default:
llvm_unreachable("Unsupported absolute code model");
case CodeModel::Small:
return makeHiLoPair(Op, SPII::MO_HI, SPII::MO_LO, DAG);
case CodeModel::Medium: {
SDValue H44 = makeHiLoPair(Op, SPII::MO_H44, SPII::MO_M44, DAG);
H44 = DAG.getNode(ISD::SHL, DL, VT, H44, DAG.getIntPtrConstant(12));
SDValue L44 = withTargetFlags(Op, SPII::MO_L44, DAG);
L44 = DAG.getNode(SPISD::Lo, DL, VT, L44);
return DAG.getNode(ISD::ADD, DL, VT, H44, L44);
}
}
}
SDValue SparcTargetLowering::LowerGlobalAddress(SDValue Op,

8
test/CodeGen/SPARC/constpool.ll
View File

@ -1,5 +1,6 @@
; 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=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
@ -13,6 +14,13 @@ entry:
; abs32: ld [%[[R]]+%lo(.LCPI0_0)], %f
; abs32: jmp %i7+8
; abs44: floatCP
; abs44: sethi %h44(.LCPI0_0), %[[R1:[gilo][0-7]]]
; abs44: add %[[R1]], %m44(.LCPI0_0), %[[R2:[gilo][0-7]]]
; abs44: sllx %[[R2]], 12, %[[R3:[gilo][0-7]]]
; abs44: ld [%[[R3]]+%l44(.LCPI0_0)], %f1
; abs44: jmp %i7+8
; v8pic32: floatCP
; v8pic32: _GLOBAL_OFFSET_TABLE_
; v8pic32: sethi %hi(.LCPI0_0), %[[R1:[gilo][0-7]]]

8
test/CodeGen/SPARC/globals.ll
View File

@ -1,5 +1,6 @@
; 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=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
@ -15,6 +16,13 @@ define zeroext i8 @loadG() {
; abs32: ldub [%[[R]]+%lo(G)], %i0
; abs32: jmp %i7+8
; abs44: loadG
; abs44: sethi %h44(G), %[[R1:[gilo][0-7]]]
; abs44: add %[[R1]], %m44(G), %[[R2:[gilo][0-7]]]
; abs44: sllx %[[R2]], 12, %[[R3:[gilo][0-7]]]
; abs44: ldub [%[[R3]]+%l44(G)], %i0
; abs44: jmp %i7+8
; v8pic32: loadG
; v8pic32: _GLOBAL_OFFSET_TABLE_
; v8pic32: sethi %hi(G), %[[R1:[gilo][0-7]]]