Implement double return values in calls. Fixes
SingleSource/Regression/C/casts.c.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115246 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index b4fd1b4..6d77ce1 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -1162,17 +1162,43 @@
CCInfo.AnalyzeCallResult(RetVT, CCAssignFnForCall(CC, true));
// Copy all of the result registers out of their specified physreg.
- assert(RVLocs.size() == 1 && "Can't handle multi-value calls!");
- EVT CopyVT = RVLocs[0].getValVT();
- TargetRegisterClass* DstRC = TLI.getRegClassFor(CopyVT);
+ if (RVLocs.size() == 2 && RetVT.getSimpleVT().SimpleTy == MVT::f64) {
+ // For this move we copy into two registers and then move into the
+ // double fp reg we want.
+ // TODO: Are the copies necessary?
+ TargetRegisterClass *CopyRC = TLI.getRegClassFor(MVT::i32);
+ unsigned Copy1 = createResultReg(CopyRC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
+ Copy1).addReg(RVLocs[0].getLocReg());
+ UsedRegs.push_back(RVLocs[0].getLocReg());
+
+ unsigned Copy2 = createResultReg(CopyRC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
+ Copy2).addReg(RVLocs[1].getLocReg());
+ UsedRegs.push_back(RVLocs[1].getLocReg());
+
+ EVT DestVT = RVLocs[0].getValVT();
+ TargetRegisterClass* DstRC = TLI.getRegClassFor(DestVT);
+ unsigned ResultReg = createResultReg(DstRC);
+ AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
+ TII.get(ARM::VMOVDRR), ResultReg)
+ .addReg(Copy1).addReg(Copy2));
+
+ // Finally update the result.
+ UpdateValueMap(I, ResultReg);
+ } else {
+ assert(RVLocs.size() == 1 && "Can't handle non-double multi-reg retvals!");
+ EVT CopyVT = RVLocs[0].getValVT();
+ TargetRegisterClass* DstRC = TLI.getRegClassFor(CopyVT);
- unsigned ResultReg = createResultReg(DstRC);
- BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
- ResultReg).addReg(RVLocs[0].getLocReg());
- UsedRegs.push_back(RVLocs[0].getLocReg());
+ unsigned ResultReg = createResultReg(DstRC);
+ BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
+ ResultReg).addReg(RVLocs[0].getLocReg());
+ UsedRegs.push_back(RVLocs[0].getLocReg());
- // Finally update the result.
- UpdateValueMap(I, ResultReg);
+ // Finally update the result.
+ UpdateValueMap(I, ResultReg);
+ }
}
return true;