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https://github.com/Gericom/teak-llvm.git
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5e17ee1e35
I intend to improve the analyzer's bug reports by tracking condition expressions. 01 bool b = messyComputation(); 02 int i = 0; 03 if (b) // control dependency of the bug site, let's explain why we assume val 04 // to be true 05 10 / i; // warn: division by zero I'll detail this heuristic in the followup patch, strictly related to this one however: * Create the new ControlDependencyCalculator class that uses llvm::IDFCalculator to (lazily) calculate control dependencies for Clang's CFG. * A new debug checker debug.DumpControlDependencies is added for lit tests * Add unittests Differential Revision: https://reviews.llvm.org/D62619 llvm-svn: 365197
72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
// RUN: %clang_analyze_cc1 %s \
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// RUN: -analyzer-checker=debug.DumpDominators \
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// RUN: -analyzer-checker=debug.DumpPostDominators \
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// RUN: -analyzer-checker=debug.DumpControlDependencies \
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// RUN: 2>&1 | FileCheck %s
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bool coin();
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namespace pr42041_unreachable_cfg_successor {
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enum Kind {
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A
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};
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void f() {
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switch(Kind{}) {
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case A:
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break;
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}
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}
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} // end of namespace pr42041_unreachable_cfg_successor
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// [B3 (ENTRY)] -> [B1] -> [B2] -> [B0 (EXIT)]
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,2)
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// CHECK-NEXT: (1,3)
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// CHECK-NEXT: (2,1)
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// CHECK-NEXT: (3,3)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,2)
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// CHECK-NEXT: (2,0)
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// CHECK-NEXT: (3,1)
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void funcWithBranch() {
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int x = 0;
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if (coin()) {
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if (coin()) {
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x = 5;
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}
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int j = 10 / x;
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(void)j;
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}
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}
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// 1st if 2nd if
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// [B5 (ENTRY)] -> [B4] -> [B3] -> [B2] -> [B1] -> [B0 (EXIT)]
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// \ \ / /
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// \ -------------> /
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// ------------------------------>
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// CHECK: Control dependencies (Node#,Dependency#):
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// CHECK-NEXT: (1,4)
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// CHECK-NEXT: (2,3)
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// CHECK-NEXT: (2,4)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: Immediate dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,4)
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// CHECK-NEXT: (1,3)
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// CHECK-NEXT: (2,3)
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// CHECK-NEXT: (3,4)
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// CHECK-NEXT: (4,5)
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// CHECK-NEXT: (5,5)
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// CHECK-NEXT: Immediate post dominance tree (Node#,IDom#):
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// CHECK-NEXT: (0,0)
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// CHECK-NEXT: (1,0)
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// CHECK-NEXT: (2,1)
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// CHECK-NEXT: (3,1)
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// CHECK-NEXT: (4,0)
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// CHECK-NEXT: (5,4)
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