Red Hat Bugzilla – Bug 470741
gcc optimizer error (on very straightforward routine)
Last modified: 2009-07-14 10:11:57 EDT
Created attachment 323028 [details]
three parts: header file, source code, gcc error report
Description of problem: With any optimization level grater than 0, gcc fails to compile a fairly straightforward main program with lots of declarations, but very little real work.
Version-Release number of selected component (if applicable):
gcc (GCC) 4.3.0 20080428 (Red Hat 4.3.0-8)
How reproducible: The code is embedded in the error file attached. The
first part of the file is f2c.h; the second part is bpmain.c; and the
third part is the gcc error file. The routine is called bpmain.c, and resulted from f2c on bpmain.f, a f77 routine which is part of the bpmpd linear programming package. (Just as an aside, the current Intel C compiler handles this without any problems).
There isn't much to optimize, but on the other hand, when it doesn't have much to do, it shouldn't bomb!
Steps to Reproduce:
1. gcc -O1 -c bpmain.c (fails)
2. gcc -O2 -c bpmain.c (fails)
3. gcc -O3 -c bpmain.c (fails)
4. gcc -O0 -c bpmain.c (works)
Additional info: the workaround, of course, was to change the makefile so that bpmain was compiled with -O0
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