From ea8711b88e6c299b1abdb652b813f54f9340c23b Mon Sep 17 00:00:00 2001 From: Daniel Sanders Date: Mon, 16 Oct 2017 03:36:29 +0000 Subject: Re-commit r315885: [globalisel][tblgen] Add support for iPTR and implement am_unscaled* and am_indexed* Summary: iPTR is a pointer of subtarget-specific size to any address space. Therefore type checks on this size derive the SizeInBits from a subtarget hook. At this point, we can import the simplests G_LOAD rules and select load instructions using them. Further patches will support for the predicates to enable additional loads as well as the stores. The previous commit failed on MSVC due to a failure to convert an initializer_list to a std::vector. Hopefully, MSVC will accept this version. Depends on D37457 Reviewers: ab, qcolombet, t.p.northover, rovka, aditya_nandakumar Reviewed By: qcolombet Subscribers: kristof.beyls, javed.absar, llvm-commits, igorb Differential Revision: https://reviews.llvm.org/D37458 llvm-svn: 315887 --- llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'llvm/lib/CodeGen') diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp index e4ee2bb7cf4..2a563c9bf5c 100644 --- a/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp +++ b/llvm/lib/CodeGen/GlobalISel/InstructionSelector.cpp @@ -18,6 +18,7 @@ #include "llvm/CodeGen/MachineFunction.h" #include "llvm/CodeGen/MachineInstr.h" #include "llvm/CodeGen/MachineOperand.h" +#include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/MC/MCInstrDesc.h" #include "llvm/Support/Debug.h" #include "llvm/Support/raw_ostream.h" @@ -98,6 +99,23 @@ bool InstructionSelector::isOperandImmEqual( return false; } +bool InstructionSelector::isBaseWithConstantOffset( + const MachineOperand &Root, const MachineRegisterInfo &MRI) const { + if (!Root.isReg()) + return false; + + MachineInstr *RootI = MRI.getVRegDef(Root.getReg()); + if (RootI->getOpcode() != TargetOpcode::G_GEP) + return false; + + MachineOperand &RHS = RootI->getOperand(2); + MachineInstr *RHSI = MRI.getVRegDef(RHS.getReg()); + if (RHSI->getOpcode() != TargetOpcode::G_CONSTANT) + return false; + + return true; +} + bool InstructionSelector::isObviouslySafeToFold(MachineInstr &MI) const { return !MI.mayLoadOrStore() && !MI.hasUnmodeledSideEffects() && MI.implicit_operands().begin() == MI.implicit_operands().end(); -- cgit v1.2.3