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analyzer: document how to get gimple dump from an ICE

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gcc/ChangeLog:
	* doc/analyzer.texi (Overview): Add tip about how to get a
	gimple dump if the analyzer ICEs.
This commit is contained in:
David Malcolm 2020-08-14 10:48:48 -04:00
parent db1c2a89db
commit 7e62503862
1 changed files with 5 additions and 0 deletions
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gcc/doc/analyzer.texi
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@ -29,6 +29,11 @@ The implementation is read-only: it doesn't attempt to change anything,
just emit warnings.
The gimple representation can be seen using @option{-fdump-ipa-analyzer}.
@quotation Tip
If the analyzer ICEs before this is written out, one workaround is to use
@option{--param=analyzer-bb-explosion-factor=0} to force the analyzer
to bail out after analyzing the first basic block.
@end quotation
First, we build a @code{supergraph} which combines the callgraph and all
of the CFGs into a single directed graph, with both interprocedural and