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| author | 2020-08-03 15:06:44 +0000 | |
|---|---|---|
| committer | 2020-08-03 15:06:44 +0000 | |
| commit | b64793999546ed8adebaeebd9d8345d18db8927d (patch) | |
| tree | 4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp | |
| parent | Add support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff) | |
| download | wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip | |
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp')
| -rw-r--r-- | gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp | 112 |
1 files changed, 0 insertions, 112 deletions
diff --git a/gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp b/gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp deleted file mode 100644 index facfa11a39a..00000000000 --- a/gnu/llvm/tools/clang/lib/Analysis/ThreadSafetyLogical.cpp +++ /dev/null @@ -1,112 +0,0 @@ -//===- ThreadSafetyLogical.cpp ---------------------------------*- C++ --*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// This file defines a representation for logical expressions with SExpr leaves -// that are used as part of fact-checking capability expressions. -//===----------------------------------------------------------------------===// - -#include "clang/Analysis/Analyses/ThreadSafetyLogical.h" - -using namespace llvm; -using namespace clang::threadSafety::lexpr; - -// Implication. We implement De Morgan's Laws by maintaining LNeg and RNeg -// to keep track of whether LHS and RHS are negated. -static bool implies(const LExpr *LHS, bool LNeg, const LExpr *RHS, bool RNeg) { - // In comments below, we write => for implication. - - // Calculates the logical AND implication operator. - const auto LeftAndOperator = [=](const BinOp *A) { - return implies(A->left(), LNeg, RHS, RNeg) && - implies(A->right(), LNeg, RHS, RNeg); - }; - const auto RightAndOperator = [=](const BinOp *A) { - return implies(LHS, LNeg, A->left(), RNeg) && - implies(LHS, LNeg, A->right(), RNeg); - }; - - // Calculates the logical OR implication operator. - const auto LeftOrOperator = [=](const BinOp *A) { - return implies(A->left(), LNeg, RHS, RNeg) || - implies(A->right(), LNeg, RHS, RNeg); - }; - const auto RightOrOperator = [=](const BinOp *A) { - return implies(LHS, LNeg, A->left(), RNeg) || - implies(LHS, LNeg, A->right(), RNeg); - }; - - // Recurse on right. - switch (RHS->kind()) { - case LExpr::And: - // When performing right recursion: - // C => A & B [if] C => A and C => B - // When performing right recursion (negated): - // C => !(A & B) [if] C => !A | !B [===] C => !A or C => !B - return RNeg ? RightOrOperator(cast<And>(RHS)) - : RightAndOperator(cast<And>(RHS)); - case LExpr::Or: - // When performing right recursion: - // C => (A | B) [if] C => A or C => B - // When performing right recursion (negated): - // C => !(A | B) [if] C => !A & !B [===] C => !A and C => !B - return RNeg ? RightAndOperator(cast<Or>(RHS)) - : RightOrOperator(cast<Or>(RHS)); - case LExpr::Not: - // Note that C => !A is very different from !(C => A). It would be incorrect - // to return !implies(LHS, RHS). - return implies(LHS, LNeg, cast<Not>(RHS)->exp(), !RNeg); - case LExpr::Terminal: - // After reaching the terminal, it's time to recurse on the left. - break; - } - - // RHS is now a terminal. Recurse on Left. - switch (LHS->kind()) { - case LExpr::And: - // When performing left recursion: - // A & B => C [if] A => C or B => C - // When performing left recursion (negated): - // !(A & B) => C [if] !A | !B => C [===] !A => C and !B => C - return LNeg ? LeftAndOperator(cast<And>(LHS)) - : LeftOrOperator(cast<And>(LHS)); - case LExpr::Or: - // When performing left recursion: - // A | B => C [if] A => C and B => C - // When performing left recursion (negated): - // !(A | B) => C [if] !A & !B => C [===] !A => C or !B => C - return LNeg ? LeftOrOperator(cast<Or>(LHS)) - : LeftAndOperator(cast<Or>(LHS)); - case LExpr::Not: - // Note that A => !C is very different from !(A => C). It would be incorrect - // to return !implies(LHS, RHS). - return implies(cast<Not>(LHS)->exp(), !LNeg, RHS, RNeg); - case LExpr::Terminal: - // After reaching the terminal, it's time to perform identity comparisons. - break; - } - - // A => A - // !A => !A - if (LNeg != RNeg) - return false; - - // FIXME -- this should compare SExprs for equality, not pointer equality. - return cast<Terminal>(LHS)->expr() == cast<Terminal>(RHS)->expr(); -} - -namespace clang { -namespace threadSafety { -namespace lexpr { - -bool implies(const LExpr *LHS, const LExpr *RHS) { - // Start out by assuming that LHS and RHS are not negated. - return ::implies(LHS, false, RHS, false); -} -} -} -} |
