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r242990 - in /trunk/gcc: ChangeLog input.c test...


Author: dmalcolm
Date: Wed Nov 30 01:13:37 2016
New Revision: 242990

URL: https://gcc.gnu.org/viewcvs?rev=242990&root=gcc&view=rev
Log:
substring locations and # line directives (PR preprocessor/78569)

The ICE in PR preprocessor/78569 appears to be due to an attempt to
generate substring locations in a .i file where the underlying .c file
has changed since the .i file was generated.

This can't work, so it seems safest for the on-demand substring
locations to be unavailable for such files, falling back to
"whole string" locations for such cases.

gcc/ChangeLog:
	PR preprocessor/78569
	* input.c (get_substring_ranges_for_loc): Fail gracefully if
	line directives were present.

gcc/testsuite/ChangeLog:
	PR preprocessor/78569
	* gcc.dg/format/pr78569.c: New test case.

Added:
    trunk/gcc/testsuite/gcc.dg/format/pr78569.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/input.c
    trunk/gcc/testsuite/ChangeLog


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