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56b9b97c1e
This new CTU implementation is the natural extension of the normal single TU analysis. The approach consists of two analysis phases. During the first phase, we do a normal single TU analysis. During this phase, if we find a foreign function (that could be inlined from another TU) then we don’t inline that immediately, we rather mark that to be analysed later. When the first phase is finished then we start the second phase, the CTU phase. In this phase, we continue the analysis from that point (exploded node) which had been enqueued during the first phase. We gradually extend the exploded graph of the single TU analysis with the new node that was created by the inlining of the foreign function. We count the number of analysis steps of the first phase and we limit the second (ctu) phase with this number. This new implementation makes it convenient for the users to run the single-TU and the CTU analysis in one go, they don't need to run the two analysis separately. Thus, we name this new implementation as "onego" CTU. Discussion: https://discourse.llvm.org/t/rfc-much-faster-cross-translation-unit-ctu-analysis-implementation/61728 Differential Revision: https://reviews.llvm.org/D123773
52 lines
2.2 KiB
C++
52 lines
2.2 KiB
C++
// RUN: rm -rf %t && mkdir %t
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// RUN: mkdir -p %t/ctudir
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// RUN: %clang_cc1 -std=c++14 -triple x86_64-pc-linux-gnu \
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// RUN: -emit-pch -o %t/ctudir/ctu-onego-small-other.cpp.ast %S/Inputs/ctu-onego-small-other.cpp
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// RUN: cp %S/Inputs/ctu-onego-small-other.cpp.externalDefMap.ast-dump.txt %t/ctudir/externalDefMap.txt
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// Small function defined in another TU.
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int bar();
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// Here we limit the ctu analysis to the first phase only (via the
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// ctu-max-nodes config options). And we check whether the small foreign
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// function `bar` is inlined.
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// RUN: %clang_analyze_cc1 -std=c++14 -triple x86_64-pc-linux-gnu \
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// RUN: -analyzer-checker=core,debug.ExprInspection \
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// RUN: -analyzer-config eagerly-assume=false \
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// RUN: -analyzer-config experimental-enable-naive-ctu-analysis=true \
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// RUN: -analyzer-config ctu-dir=%t/ctudir \
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// RUN: -analyzer-config display-ctu-progress=true \
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// RUN: -analyzer-display-progress \
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// RUN: -analyzer-config ctu-max-nodes-pct=0 \
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// RUN: -analyzer-config ctu-max-nodes-min=0 2>&1 %s | FileCheck %s
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// CHECK: ANALYZE (Path, Inline_Regular): {{.*}} baruser(int){{.*}}CTU loaded AST file
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// RUN: %clang_analyze_cc1 -std=c++14 -triple x86_64-pc-linux-gnu \
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// RUN: -analyzer-checker=core,debug.ExprInspection \
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// RUN: -analyzer-config eagerly-assume=false \
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// RUN: -analyzer-config experimental-enable-naive-ctu-analysis=true \
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// RUN: -analyzer-config ctu-dir=%t/ctudir \
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// RUN: -analyzer-config ctu-max-nodes-pct=0 \
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// RUN: -analyzer-config ctu-phase1-inlining=none \
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// RUN: -analyzer-config ctu-max-nodes-min=0 -verify=inline-none %s
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// RUN: %clang_analyze_cc1 -std=c++14 -triple x86_64-pc-linux-gnu \
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// RUN: -analyzer-checker=core,debug.ExprInspection \
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// RUN: -analyzer-config eagerly-assume=false \
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// RUN: -analyzer-config experimental-enable-naive-ctu-analysis=true \
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// RUN: -analyzer-config ctu-dir=%t/ctudir \
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// RUN: -analyzer-config ctu-max-nodes-pct=0 \
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// RUN: -analyzer-config ctu-phase1-inlining=small \
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// RUN: -analyzer-config ctu-max-nodes-min=0 -verify=inline-small %s
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void clang_analyzer_eval(int);
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void baruser(int x) {
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int y = bar();
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// inline-none-warning@+2{{UNKNOWN}}
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// inline-small-warning@+1{{TRUE}}
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clang_analyzer_eval(y == 0);
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}
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