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Fix ARM FastISel PIC function call.
The function call to external function should come with PLT relocation type if the PIC relocation model is used. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189002 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2460,15 +2460,22 @@ bool ARMFastISel::SelectCall(const Instruction *I,
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MachineInstrBuilder MIB = BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt,
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DL, TII.get(CallOpc));
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unsigned char OpFlags = 0;
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// Add MO_PLT for global address or external symbol in the PIC relocation
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// model.
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if (Subtarget->isTargetELF() && TM.getRelocationModel() == Reloc::PIC_)
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OpFlags = ARMII::MO_PLT;
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// ARM calls don't take a predicate, but tBL / tBLX do.
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if(isThumb2)
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AddDefaultPred(MIB);
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if (UseReg)
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MIB.addReg(CalleeReg);
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else if (!IntrMemName)
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MIB.addGlobalAddress(GV, 0, 0);
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MIB.addGlobalAddress(GV, 0, OpFlags);
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else
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MIB.addExternalSymbol(IntrMemName, 0);
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MIB.addExternalSymbol(IntrMemName, OpFlags);
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// Add implicit physical register uses to the call.
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for (unsigned i = 0, e = RegArgs.size(); i != e; ++i)
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23
test/CodeGen/ARM/pic.ll
Normal file
23
test/CodeGen/ARM/pic.ll
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@ -0,0 +1,23 @@
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; Check the function call in PIC relocation model.
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; If the relocation model is PIC, then the "bl" instruction for the function
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; call to the external function should come with PLT fixup type.
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; RUN: llc < %s -mtriple=armv7-unknown-linux-gnueabi \
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; RUN: -relocation-model=pic -fast-isel \
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; RUN: | FileCheck %s
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define void @test() {
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entry:
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%0 = call i32 @get()
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; CHECK: bl get(PLT)
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call void @put(i32 %0)
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; CHECK: bl put(PLT)
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ret void
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}
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declare i32 @get()
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declare void @put(i32)
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