[llvm-commits] [llvm] r123310 - in /llvm/trunk: lib/Target/Sparc/SparcISelLowering.cpp lib/Target/Sparc/SparcISelLowering.h lib/Target/Sparc/SparcInstrInfo.td test/CodeGen/SPARC/2011-01-11-FrameAddr.ll
Venkatraman Govindaraju
venkatra at cs.wisc.edu
Tue Jan 11 21:08:36 PST 2011
Author: venkatra
Date: Tue Jan 11 23:08:36 2011
New Revision: 123310
URL: http://llvm.org/viewvc/llvm-project?rev=123310&view=rev
Log:
Implement RETURNADDR and FRAMEADDR lowering in SPARC backend.
Added:
llvm/trunk/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll
Modified:
llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp
llvm/trunk/lib/Target/Sparc/SparcISelLowering.h
llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td
Modified: llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp?rev=123310&r1=123309&r2=123310&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp Tue Jan 11 23:08:36 2011
@@ -743,6 +743,8 @@
case SPISD::ITOF: return "SPISD::ITOF";
case SPISD::CALL: return "SPISD::CALL";
case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
+ case SPISD::GLOBAL_BASE_REG: return "SPISD::GLOBAL_BASE_REG";
+ case SPISD::FLUSH: return "SPISD::FLUSH";
}
}
@@ -990,13 +992,82 @@
}
+static SDValue getFLUSH(SDValue Op, SelectionDAG &DAG) {
+ DebugLoc dl = Op.getDebugLoc();
+ SDValue Chain = DAG.getNode(SPISD::FLUSH,
+ dl, MVT::Other, DAG.getEntryNode());
+ return Chain;
+}
+
+static SDValue LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ MFI->setFrameAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned FrameReg = SP::I6;
+
+ uint64_t depth = Op.getConstantOperandVal(0);
+
+ SDValue FrameAddr;
+ if (depth == 0)
+ FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
+ else {
+ // flush first to make sure the windowed registers' values are in stack
+ SDValue Chain = getFLUSH(Op, DAG);
+ FrameAddr = DAG.getCopyFromReg(Chain, dl, FrameReg, VT);
+
+ for (uint64_t i = 0; i != depth; ++i) {
+ SDValue Ptr = DAG.getNode(ISD::ADD,
+ dl, MVT::i32,
+ FrameAddr, DAG.getIntPtrConstant(56));
+ FrameAddr = DAG.getLoad(MVT::i32, dl,
+ Chain,
+ Ptr,
+ MachinePointerInfo(), false, false, 0);
+ }
+ }
+ return FrameAddr;
+}
+
+static SDValue LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) {
+ MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+ MFI->setReturnAddressIsTaken(true);
+
+ EVT VT = Op.getValueType();
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned RetReg = SP::I7;
+
+ uint64_t depth = Op.getConstantOperandVal(0);
+
+ SDValue RetAddr;
+ if (depth == 0)
+ RetAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, RetReg, VT);
+ else {
+ // flush first to make sure the windowed registers' values are in stack
+ SDValue Chain = getFLUSH(Op, DAG);
+ RetAddr = DAG.getCopyFromReg(Chain, dl, SP::I6, VT);
+
+ for (uint64_t i = 0; i != depth; ++i) {
+ SDValue Ptr = DAG.getNode(ISD::ADD,
+ dl, MVT::i32,
+ RetAddr,
+ DAG.getIntPtrConstant((i == depth-1)?60:56));
+ RetAddr = DAG.getLoad(MVT::i32, dl,
+ Chain,
+ Ptr,
+ MachinePointerInfo(), false, false, 0);
+ }
+ }
+ return RetAddr;
+}
+
SDValue SparcTargetLowering::
LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
default: llvm_unreachable("Should not custom lower this!");
- // Frame & Return address. Currently unimplemented
- case ISD::RETURNADDR: return SDValue();
- case ISD::FRAMEADDR: return SDValue();
+ case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
+ case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
case ISD::GlobalTLSAddress:
llvm_unreachable("TLS not implemented for Sparc.");
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
Modified: llvm/trunk/lib/Target/Sparc/SparcISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Sparc/SparcISelLowering.h?rev=123310&r1=123309&r2=123310&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Sparc/SparcISelLowering.h (original)
+++ llvm/trunk/lib/Target/Sparc/SparcISelLowering.h Tue Jan 11 23:08:36 2011
@@ -36,7 +36,8 @@
CALL, // A call instruction.
RET_FLAG, // Return with a flag operand.
- GLOBAL_BASE_REG // Global base reg for PIC
+ GLOBAL_BASE_REG, // Global base reg for PIC
+ FLUSH // FLUSH registers to stack
};
}
Modified: llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td?rev=123310&r1=123309&r2=123310&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td (original)
+++ llvm/trunk/lib/Target/Sparc/SparcInstrInfo.td Tue Jan 11 23:08:36 2011
@@ -127,6 +127,9 @@
def retflag : SDNode<"SPISD::RET_FLAG", SDTNone,
[SDNPHasChain, SDNPOptInGlue]>;
+def flush : SDNode<"SPISD::FLUSH", SDTNone,
+ [SDNPHasChain]>;
+
def getPCX : Operand<i32> {
let PrintMethod = "printGetPCX";
}
@@ -218,6 +221,12 @@
[(callseq_end timm:$amt1, timm:$amt2)]>;
}
+let hasSideEffects = 1, mayStore = 1 in
+ let rs2 = 0 in
+ def FLUSH : F3_1<0b10, 0b101011, (outs), (ins),
+ "flushw",
+ [(flush)]>;
+
// FpMOVD/FpNEGD/FpABSD - These are lowered to single-precision ops by the
// fpmover pass.
let Predicates = [HasNoV9] in { // Only emit these in V8 mode.
Added: llvm/trunk/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll?rev=123310&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll (added)
+++ llvm/trunk/test/CodeGen/SPARC/2011-01-11-FrameAddr.ll Tue Jan 11 23:08:36 2011
@@ -0,0 +1,46 @@
+;RUN: llc -march=sparc < %s | FileCheck %s
+
+
+define i8* @frameaddr() nounwind readnone {
+entry:
+;CHECK: frameaddr
+;CHECK: or %g0, %fp, {{.+}}
+ %0 = tail call i8* @llvm.frameaddress(i32 0)
+ ret i8* %0
+}
+
+define i8* @frameaddr2() nounwind readnone {
+entry:
+;CHECK: frameaddr2
+;CHECK: flushw
+;CHECK: ld [%fp+56], {{.+}}
+;CHECK: ld [{{.+}}+56], {{.+}}
+;CHECK: ld [{{.+}}+56], {{.+}}
+ %0 = tail call i8* @llvm.frameaddress(i32 3)
+ ret i8* %0
+}
+
+declare i8* @llvm.frameaddress(i32) nounwind readnone
+
+
+
+define i8* @retaddr() nounwind readnone {
+entry:
+;CHECK: retaddr
+;CHECK: or %g0, %i7, {{.+}}
+ %0 = tail call i8* @llvm.returnaddress(i32 0)
+ ret i8* %0
+}
+
+define i8* @retaddr2() nounwind readnone {
+entry:
+;CHECK: retaddr2
+;CHECK: flushw
+;CHECK: ld [%fp+56], {{.+}}
+;CHECK: ld [{{.+}}+56], {{.+}}
+;CHECK: ld [{{.+}}+60], {{.+}}
+ %0 = tail call i8* @llvm.returnaddress(i32 3)
+ ret i8* %0
+}
+
+declare i8* @llvm.returnaddress(i32) nounwind readnone
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