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ade705c6e5
This re-applies r225808, fixed to avoid problems with SDAG dependencies along
with the preceding fix to ScheduleDAGSDNodes::RegDefIter::InitNodeNumDefs.
These problems caused the original regression tests to assert/segfault on many
(but not all) systems.
Original commit message:
This commit does two things:
1. Refactors PPCFastISel to use more of the common infrastructure for call
lowering (this lets us take advantage of this common code for lowering some
common intrinsics, stackmap/patchpoint among them).
2. Adds support for stackmap/patchpoint lowering. For the most part, this is
very similar to the support in the AArch64 target, with the obvious differences
(different registers, NOP instructions, etc.). The test cases are adapted
from the AArch64 test cases.
One difference of note is that the patchpoint call sequence takes 24 bytes, so
you can't use less than that (on AArch64 you can go down to 16). Also, as noted
in the docs, we take the patchpoint address to be the actual code address
(assuming the call is local in the TOC-sharing sense), which should yield
higher performance than generating the full cross-DSO indirect-call sequence
and is likely just as useful for JITed code (if not, we'll change it).
StackMaps and Patchpoints are still marked as experimental, and so this support
is doubly experimental. So go ahead and experiment!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225909 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
//=== PPCCallingConv.h - PPC Custom Calling Convention Routines -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the custom routines for the PPC Calling Convention that
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// aren't done by tablegen.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_PPC_PPCCALLINGCONV_H
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#define LLVM_LIB_TARGET_PPC_PPCCALLINGCONV_H
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#include "llvm/CodeGen/CallingConvLower.h"
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#include "llvm/IR/CallingConv.h"
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namespace llvm {
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inline bool CC_PPC_AnyReg_Error(unsigned &, MVT &, MVT &,
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CCValAssign::LocInfo &, ISD::ArgFlagsTy &,
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CCState &) {
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llvm_unreachable("The AnyReg calling convention is only supported by the " \
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"stackmap and patchpoint intrinsics.");
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// gracefully fallback to PPC C calling convention on Release builds.
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return false;
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}
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} // End llvm namespace
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#endif
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