c2d892668b
This adds instrumenting callsites to PGOInstrumentation, *if* contextual profiling is requested. The latter also enables inserting counters in the entry basic block and disables value profiling (the latter is a point in time change) This change adds the skeleton of the contextual profiling lowering pass, just so we can introduce the flag controlling that and the API to check that. The actual lowering pass will be introduced in a subsequent patch. (Tracking Issue: #89287, RFC referenced there)
25 lines
886 B
C++
25 lines
886 B
C++
//===- PGOCtxProfLowering.cpp - Contextual PGO Instr. Lowering ------------===//
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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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//
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#include "llvm/Transforms/Instrumentation/PGOCtxProfLowering.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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static cl::list<std::string> ContextRoots(
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"profile-context-root", cl::Hidden,
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cl::desc(
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"A function name, assumed to be global, which will be treated as the "
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"root of an interesting graph, which will be profiled independently "
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"from other similar graphs."));
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bool PGOCtxProfLoweringPass::isContextualIRPGOEnabled() {
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return !ContextRoots.empty();
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}
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