Add SPARC v9 support for select on 64-bit compares.
This requires v9 cmov instructions using the %xcc flags instead of the
%icc flags.
Still missing:
- Select floats on %xcc flags.
- Select i64 on %fcc flags.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178737 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcISelLowering.cpp b/lib/Target/Sparc/SparcISelLowering.cpp
index a9ce75a..325f134 100644
--- a/lib/Target/Sparc/SparcISelLowering.cpp
+++ b/lib/Target/Sparc/SparcISelLowering.cpp
@@ -826,6 +826,7 @@
if (Subtarget->is64Bit()) {
setOperationAction(ISD::BR_CC, MVT::i64, Custom);
+ setOperationAction(ISD::SELECT_CC, MVT::i64, Custom);
}
// FIXME: There are instructions available for ATOMIC_FENCE
@@ -900,6 +901,7 @@
case SPISD::BRXCC: return "SPISD::BRXCC";
case SPISD::BRFCC: return "SPISD::BRFCC";
case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
+ case SPISD::SELECT_XCC: return "SPISD::SELECT_XCC";
case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
case SPISD::Hi: return "SPISD::Hi";
case SPISD::Lo: return "SPISD::Lo";
@@ -926,6 +928,7 @@
switch (Op.getOpcode()) {
default: break;
case SPISD::SELECT_ICC:
+ case SPISD::SELECT_XCC:
case SPISD::SELECT_FCC:
DAG.ComputeMaskedBits(Op.getOperand(1), KnownZero, KnownOne, Depth+1);
DAG.ComputeMaskedBits(Op.getOperand(0), KnownZero2, KnownOne2, Depth+1);
@@ -946,7 +949,8 @@
if (isa<ConstantSDNode>(RHS) &&
cast<ConstantSDNode>(RHS)->isNullValue() &&
CC == ISD::SETNE &&
- ((LHS.getOpcode() == SPISD::SELECT_ICC &&
+ (((LHS.getOpcode() == SPISD::SELECT_ICC ||
+ LHS.getOpcode() == SPISD::SELECT_XCC) &&
LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
(LHS.getOpcode() == SPISD::SELECT_FCC &&
LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
@@ -1064,12 +1068,13 @@
LookThroughSetCC(LHS, RHS, CC, SPCC);
SDValue CompareFlag;
- if (LHS.getValueType() == MVT::i32) {
+ if (LHS.getValueType().isInteger()) {
// subcc returns a value
EVT VTs[] = { LHS.getValueType(), MVT::Glue };
SDValue Ops[2] = { LHS, RHS };
CompareFlag = DAG.getNode(SPISD::CMPICC, dl, VTs, Ops, 2).getValue(1);
- Opc = SPISD::SELECT_ICC;
+ Opc = LHS.getValueType() == MVT::i32 ?
+ SPISD::SELECT_ICC : SPISD::SELECT_XCC;
if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
} else {
CompareFlag = DAG.getNode(SPISD::CMPFCC, dl, MVT::Glue, LHS, RHS);