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llvm-project/clang/test/Analysis/hangs.c

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[analyzer] Improve performance of the SVal simplification mechanism. When neither LHS nor RHS of a binary operator expression can be simplified, return the original expression instead of re-evaluating the binary operator. Such re-evaluation was causing recusrive re-simplification which caused the algorithmic complexity to explode. Differential Revision: https://reviews.llvm.org/D47155 llvm-svn: 333670
2018-06-01 01:22:38 +08:00
// RUN: %clang_analyze_cc1 -analyzer-checker core -verify %s
// expected-no-diagnostics
// Stuff that used to hang.
int g();
int f(int y) {
return y + g();
}
int produce_a_very_large_symbol(int x) {
return f(f(f(f(f(f(f(f(f(f(f(f(f(f(f(f(f(
f(f(f(f(f(f(f(f(f(f(f(f(f(f(f(x))))))))))))))))))))))))))))))));
}
void produce_an_exponentially_exploding_symbol(int x, int y) {
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
x += y; y += x + g();
}