analyzer: fix reproducer for PR 93375
Reproducing the ICE in PR analyzer/93375 required some kind of analyzer diagnostic occurring after a call with fewer arguments than required by the callee. The testcase used __builtin_memcpy with a NULL argument for this. On x86_64-pc-linux-gnu this happened to be already optimized into: _4 = MEM <unsigned int> [(char * {ref-all})0B]; MEM <unsigned int> [(char * {ref-all})rl_1] = _4; by the time of the analyzer pass, leading to the diagnostic in question being: warning: dereference of NULL ‘rl’ [CWE-690] [-Wanalyzer-null-dereference] On other targets e.g. arm-unknown-linux-gnueabi, the builtin isn't optimized at the time of the analyzer pass, leading to this diagnostic instead: warning: use of NULL ‘rl’ where non-null expected [CWE-690] [-Wanalyzer-null-argument] <built-in>: note: argument 1 of ‘__builtin_memcpy’ must be non-null This patch fixes the test case by using a custom function marked as nonnull. I manually verified that it still reproduces the ICE if the patch for the PR is reverted. gcc/testsuite/ChangeLog: PR analyzer/93375 * gcc.dg/analyzer/pr93375.c: Rework test case to avoid per-target differences in how __builtin_memcpy has been optimized at the time the analyzer runs.
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