bd9145c8c2
I was wrong last patch. I viewed the `Visited` set purely as a possible recursion deterrent where functions calling a callee multiple times are handled elsewhere. This doesn't consider cases where a function is called multiple times by different callers still part of the same call graph. New test shows the aforementioned case. Reapplies #111004, fixes #115562.
125 lines
4.5 KiB
C++
125 lines
4.5 KiB
C++
//===- AMDGPUMCExpr.h - AMDGPU specific MC expression classes ---*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H
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#define LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/MC/MCExpr.h"
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namespace llvm {
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class Function;
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class GCNSubtarget;
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/// AMDGPU target specific MCExpr operations.
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///
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/// Takes in a minimum of 1 argument to be used with an operation. The supported
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/// operations are:
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/// - (bitwise) or
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/// - max
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///
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/// \note If the 'or'/'max' operations are provided only a single argument, the
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/// operation will act as a no-op and simply resolve as the provided argument.
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///
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class AMDGPUMCExpr : public MCTargetExpr {
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public:
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enum VariantKind {
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AGVK_None,
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AGVK_Or,
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AGVK_Max,
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AGVK_ExtraSGPRs,
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AGVK_TotalNumVGPRs,
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AGVK_AlignTo,
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AGVK_Occupancy
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};
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private:
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VariantKind Kind;
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MCContext &Ctx;
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const MCExpr **RawArgs;
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ArrayRef<const MCExpr *> Args;
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AMDGPUMCExpr(VariantKind Kind, ArrayRef<const MCExpr *> Args, MCContext &Ctx);
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~AMDGPUMCExpr();
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bool evaluateExtraSGPRs(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const;
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bool evaluateTotalNumVGPR(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const;
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bool evaluateAlignTo(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const;
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bool evaluateOccupancy(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const;
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public:
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static const AMDGPUMCExpr *
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create(VariantKind Kind, ArrayRef<const MCExpr *> Args, MCContext &Ctx);
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static const AMDGPUMCExpr *createOr(ArrayRef<const MCExpr *> Args,
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MCContext &Ctx) {
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return create(VariantKind::AGVK_Or, Args, Ctx);
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}
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static const AMDGPUMCExpr *createMax(ArrayRef<const MCExpr *> Args,
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MCContext &Ctx) {
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return create(VariantKind::AGVK_Max, Args, Ctx);
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}
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static const AMDGPUMCExpr *createExtraSGPRs(const MCExpr *VCCUsed,
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const MCExpr *FlatScrUsed,
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bool XNACKUsed, MCContext &Ctx);
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static const AMDGPUMCExpr *createTotalNumVGPR(const MCExpr *NumAGPR,
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const MCExpr *NumVGPR,
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MCContext &Ctx);
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static const AMDGPUMCExpr *
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createAlignTo(const MCExpr *Value, const MCExpr *Align, MCContext &Ctx) {
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return create(VariantKind::AGVK_AlignTo, {Value, Align}, Ctx);
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}
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static const AMDGPUMCExpr *createOccupancy(unsigned InitOcc,
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const MCExpr *NumSGPRs,
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const MCExpr *NumVGPRs,
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const GCNSubtarget &STM,
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MCContext &Ctx);
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ArrayRef<const MCExpr *> getArgs() const { return Args; }
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VariantKind getKind() const { return Kind; }
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const MCExpr *getSubExpr(size_t Index) const;
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void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
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bool evaluateAsRelocatableImpl(MCValue &Res, const MCAssembler *Asm,
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const MCFixup *Fixup) const override;
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bool isSymbolUsedInExpression(const MCSymbol *Sym) const override;
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void visitUsedExpr(MCStreamer &Streamer) const override;
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MCFragment *findAssociatedFragment() const override;
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void fixELFSymbolsInTLSFixups(MCAssembler &) const override{};
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static bool classof(const MCExpr *E) {
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return E->getKind() == MCExpr::Target;
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}
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};
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namespace AMDGPU {
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// Tries to leverage KnownBits for MCExprs to reduce and limit any composed
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// MCExprs printing. E.g., for an expression such as
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// ((unevaluatable_sym | 1) & 1) won't evaluate due to unevaluatable_sym and
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// would verbosely print the full expression; however, KnownBits should deduce
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// the value to be 1. Particularly useful for AMDGPU metadata MCExprs.
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void printAMDGPUMCExpr(const MCExpr *Expr, raw_ostream &OS,
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const MCAsmInfo *MAI);
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const MCExpr *foldAMDGPUMCExpr(const MCExpr *Expr, MCContext &Ctx);
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} // end namespace AMDGPU
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} // end namespace llvm
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#endif // LLVM_LIB_TARGET_AMDGPU_MCTARGETDESC_AMDGPUMCEXPR_H
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