Fix i64->f64 conversion, x86-64, -no-sse. A bit
tricky since there's a 3rd 64-bit type, MMX vectors.
PR 7135.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104308 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 4206cbb..78144ab 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -217,6 +217,11 @@
if (!X86ScalarSSEf64) {
setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
+ if (Subtarget->is64Bit() && Subtarget->hasMMX() && !DisableMMX) {
+ // Without SSE, i64->f64 goes through memory; i64->MMX is legal.
+ setOperationAction(ISD::BIT_CONVERT , MVT::i64 , Custom);
+ setOperationAction(ISD::BIT_CONVERT , MVT::f64 , Expand);
+ }
}
// Scalar integer divide and remainder are lowered to use operations that
@@ -678,6 +683,14 @@
setOperationAction(ISD::VSETCC, MVT::v8i8, Custom);
setOperationAction(ISD::VSETCC, MVT::v4i16, Custom);
setOperationAction(ISD::VSETCC, MVT::v2i32, Custom);
+
+ if (!X86ScalarSSEf64 && Subtarget->is64Bit()) {
+ setOperationAction(ISD::BIT_CONVERT, MVT::v8i8, Custom);
+ setOperationAction(ISD::BIT_CONVERT, MVT::v4i16, Custom);
+ setOperationAction(ISD::BIT_CONVERT, MVT::v2i32, Custom);
+ setOperationAction(ISD::BIT_CONVERT, MVT::v2f32, Custom);
+ setOperationAction(ISD::BIT_CONVERT, MVT::v1i64, Custom);
+ }
}
if (!UseSoftFloat && Subtarget->hasSSE1()) {
@@ -7458,6 +7471,24 @@
return DAG.getMergeValues(Ops, 2, dl);
}
+SDValue X86TargetLowering::LowerBIT_CONVERT(SDValue Op,
+ SelectionDAG &DAG) const {
+ EVT SrcVT = Op.getOperand(0).getValueType();
+ EVT DstVT = Op.getValueType();
+ assert((Subtarget->is64Bit() && !Subtarget->hasSSE2() &&
+ Subtarget->hasMMX() && !DisableMMX) &&
+ "Unexpected custom BIT_CONVERT");
+ assert((DstVT == MVT::i64 ||
+ (DstVT.isVector() && DstVT.getSizeInBits()==64)) &&
+ "Unexpected custom BIT_CONVERT");
+ // i64 <=> MMX conversions are Legal.
+ if (SrcVT==MVT::i64 && DstVT.isVector())
+ return Op;
+ if (DstVT==MVT::i64 && SrcVT.isVector())
+ return Op;
+ // All other conversions need to be expanded.
+ return SDValue();
+}
SDValue X86TargetLowering::LowerLOAD_SUB(SDValue Op, SelectionDAG &DAG) const {
SDNode *Node = Op.getNode();
DebugLoc dl = Node->getDebugLoc();
@@ -7527,6 +7558,7 @@
case ISD::SMULO:
case ISD::UMULO: return LowerXALUO(Op, DAG);
case ISD::READCYCLECOUNTER: return LowerREADCYCLECOUNTER(Op, DAG);
+ case ISD::BIT_CONVERT: return LowerBIT_CONVERT(Op, DAG);
}
}