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Refine Cell's i64 constant generation code to cover more constants where the

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upper and lower 32-bits are the same (in addition to 0 and -1 previously.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47985 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Scott Michel 2008-03-06 04:02:54 +00:00
parent 6ad150baac
commit 4cb8bd8eff
2 changed files with 33 additions and 8 deletions
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35
lib/Target/CellSPU/SPUISelLowering.cpp
View File

@ -1354,6 +1354,14 @@ SDOperand SPU::get_vec_u18imm(SDNode *N, SelectionDAG &DAG,
MVT::ValueType ValueType) { MVT::ValueType ValueType) {
if (ConstantSDNode *CN = getVecImm(N)) { if (ConstantSDNode *CN = getVecImm(N)) {
uint64_t Value = CN->getValue(); uint64_t Value = CN->getValue();
if (ValueType == MVT::i64) {
uint64_t UValue = CN->getValue();
uint32_t upper = uint32_t(UValue >> 32);
uint32_t lower = uint32_t(UValue);
if (upper != lower)
return SDOperand();
Value = Value >> 32;
}
if (Value <= 0x3ffff) if (Value <= 0x3ffff)
return DAG.getConstant(Value, ValueType); return DAG.getConstant(Value, ValueType);
} }
@ -1368,6 +1376,14 @@ SDOperand SPU::get_vec_i16imm(SDNode *N, SelectionDAG &DAG,
MVT::ValueType ValueType) { MVT::ValueType ValueType) {
if (ConstantSDNode *CN = getVecImm(N)) { if (ConstantSDNode *CN = getVecImm(N)) {
int64_t Value = CN->getSignExtended(); int64_t Value = CN->getSignExtended();
if (ValueType == MVT::i64) {
uint64_t UValue = CN->getValue();
uint32_t upper = uint32_t(UValue >> 32);
uint32_t lower = uint32_t(UValue);
if (upper != lower)
return SDOperand();
Value = Value >> 32;
}
if (Value >= -(1 << 15) && Value <= ((1 << 15) - 1)) { if (Value >= -(1 << 15) && Value <= ((1 << 15) - 1)) {
return DAG.getConstant(Value, ValueType); return DAG.getConstant(Value, ValueType);
} }
@ -1383,6 +1399,14 @@ SDOperand SPU::get_vec_i10imm(SDNode *N, SelectionDAG &DAG,
MVT::ValueType ValueType) { MVT::ValueType ValueType) {
if (ConstantSDNode *CN = getVecImm(N)) { if (ConstantSDNode *CN = getVecImm(N)) {
int64_t Value = CN->getSignExtended(); int64_t Value = CN->getSignExtended();
if (ValueType == MVT::i64) {
uint64_t UValue = CN->getValue();
uint32_t upper = uint32_t(UValue >> 32);
uint32_t lower = uint32_t(UValue);
if (upper != lower)
return SDOperand();
Value = Value >> 32;
}
if (isS10Constant(Value)) if (isS10Constant(Value))
return DAG.getConstant(Value, ValueType); return DAG.getConstant(Value, ValueType);
} }
@ -1626,13 +1650,10 @@ static SDOperand LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
uint32_t upper = uint32_t(val >> 32); uint32_t upper = uint32_t(val >> 32);
uint32_t lower = uint32_t(val); uint32_t lower = uint32_t(val);
if (val == 0) { if (upper == lower) {
SDOperand Zero = DAG.getTargetConstant(0, MVT::i64); // Magic constant that can be matched by IL, ILA, et. al.
return DAG.getNode(ISD::BUILD_VECTOR, VT, Zero, Zero); SDOperand Val = DAG.getTargetConstant(val, MVT::i64);
} else if (val == 0xffffffffffffffffULL) { return DAG.getNode(ISD::BUILD_VECTOR, VT, Val, Val);
// For -1, this and has a chance of matching immAllOnesV.
SDOperand NegOne = DAG.getTargetConstant(-1, MVT::i64);
return DAG.getNode(ISD::BUILD_VECTOR, VT, NegOne, NegOne);
} else { } else {
SDOperand LO32; SDOperand LO32;
SDOperand HI32; SDOperand HI32;

6
test/CodeGen/CellSPU/immed64.ll
View File

@ -1,6 +1,6 @@
; RUN: llvm-as -o - %s | llc -march=cellspu > %t1.s ; RUN: llvm-as -o - %s | llc -march=cellspu > %t1.s
; RUN: grep lqa %t1.s | count 13 ; RUN: grep lqa %t1.s | count 13
; RUN: grep il %t1.s | count 21 ; RUN: grep il %t1.s | count 22
; RUN: grep shufb %t1.s | count 13 ; RUN: grep shufb %t1.s | count 13
; RUN: grep 65520 %t1.s | count 1 ; RUN: grep 65520 %t1.s | count 1
; RUN: grep 43981 %t1.s | count 1 ; RUN: grep 43981 %t1.s | count 1
@ -57,6 +57,10 @@ define i64 @i64_const_9() {
ret i64 -1 ;; IL ret i64 -1 ;; IL
} }
define i64 @i64_const_10() {
ret i64 281470681808895 ;; IL 65535
}
; 0x4005bf0a8b145769 -> ; 0x4005bf0a8b145769 ->
; (ILHU 0x4005 [16389]/IOHL 0xbf0a [48906]) ; (ILHU 0x4005 [16389]/IOHL 0xbf0a [48906])
; (ILHU 0x8b14 [35604]/IOHL 0x5769 [22377]) ; (ILHU 0x8b14 [35604]/IOHL 0x5769 [22377])