teak-llvm/clang/test/Analysis/hangs.c
Artem Dergachev 16a1f64ccf [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
2018-05-31 17:22:38 +00:00

31 lines
660 B
C

// 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();
}