mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Andrea Gussoni
ca422bafd2
We introduce the PromoteCallNoReturn beautification pass. Its goal is to restructure sequence of statements, in order to have `call`s to `noreturn` functions as _inlined_ in the middle of the statement sequence, and leave _non local control flow statements_ at the end of that scope. E.g., we prefer: ``` if (cond) call noreturnfunc(); return; ``` to ``` if (!cond) return; call noreturnfunc(); ``` In order to do this, contextually, we restructure the routine computing the `fallthrough` property, in order to be able to differentiate between the _non local control flow statements_, a call to a `noreturn` function, or a generic mix of the two (useful when combining results from the two situations above). The new analysis is also used in the `promoteNoFallThrough` promotion pass.
33 lines
706 B
C++
33 lines
706 B
C++
#pragma once
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//
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// Copyright rev.ng Labs Srl. See LICENSE.md for details.
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//
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#include "revng/Model/IRHelpers.h"
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// Forward declarations
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class ASTNode;
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class ASTTree;
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// This `enum class` is used to represent the fallthrough type
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enum class FallThroughScopeType {
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FallThrough,
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// This is a placeholder state to represent the combination of two no
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// fallthrough states
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MixedNoFallThrough,
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CallNoReturn,
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Return,
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Continue,
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LoopBreak,
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SwitchBreak,
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};
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using FallThroughScopeTypeMap = std::map<const ASTNode *, FallThroughScopeType>;
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bool fallsThrough(FallThroughScopeType Element);
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extern FallThroughScopeTypeMap
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computeFallThroughScope(const model::Binary &Model, ASTNode *RootNode);
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