[GlobalISel] add helper function to create arbitrary libcalls
Summary:
The existing helper function can only create a libcall to functions available in
RTLIB. Add a helper function that can create a libcall to a given function name
using the provided calling convention.
Reviewers: aditya_nandakumar, t.p.northover, rovka, arsenm, dsanders
Reviewed By: arsenm
Subscribers: wdng, hiraditya, volkan, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D76845
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index ac9b35a..51eec30 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -489,15 +489,14 @@
}
LegalizerHelper::LegalizeResult
-llvm::createLibcall(MachineIRBuilder &MIRBuilder, RTLIB::Libcall Libcall,
+llvm::createLibcall(MachineIRBuilder &MIRBuilder, const char *Name,
const CallLowering::ArgInfo &Result,
- ArrayRef<CallLowering::ArgInfo> Args) {
+ ArrayRef<CallLowering::ArgInfo> Args,
+ const CallingConv::ID CC) {
auto &CLI = *MIRBuilder.getMF().getSubtarget().getCallLowering();
- auto &TLI = *MIRBuilder.getMF().getSubtarget().getTargetLowering();
- const char *Name = TLI.getLibcallName(Libcall);
CallLowering::CallLoweringInfo Info;
- Info.CallConv = TLI.getLibcallCallingConv(Libcall);
+ Info.CallConv = CC;
Info.Callee = MachineOperand::CreateES(Name);
Info.OrigRet = Result;
std::copy(Args.begin(), Args.end(), std::back_inserter(Info.OrigArgs));
@@ -507,6 +506,16 @@
return LegalizerHelper::Legalized;
}
+LegalizerHelper::LegalizeResult
+llvm::createLibcall(MachineIRBuilder &MIRBuilder, RTLIB::Libcall Libcall,
+ const CallLowering::ArgInfo &Result,
+ ArrayRef<CallLowering::ArgInfo> Args) {
+ auto &TLI = *MIRBuilder.getMF().getSubtarget().getTargetLowering();
+ const char *Name = TLI.getLibcallName(Libcall);
+ const CallingConv::ID CC = TLI.getLibcallCallingConv(Libcall);
+ return createLibcall(MIRBuilder, Name, Result, Args, CC);
+}
+
// Useful for libcalls where all operands have the same type.
static LegalizerHelper::LegalizeResult
simpleLibcall(MachineInstr &MI, MachineIRBuilder &MIRBuilder, unsigned Size,
