optimization/8423: CSE1 not propagating __builtin_constant_p enough

Fri Nov 1 06:56:00 GMT 2002

>Number:         8423
>Category:       optimization
>Synopsis:       CSE1 not propagating __builtin_constant_p enough
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 01 06:56:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     arjanv@redhat.com
>Release:        unknown-1.0
>Organization:
>Environment:

>Description:
Older versions of gcc didn't propagate constant info enough in some cases (see attached testcase). This PR is filed to add the test as a regression test, not so much as to get it re-fixed
>How-To-Repeat:
compile with -O2; both printf's should claim builtin but soome older gcc's didn't
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="test.c"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="test.c"

I2RlZmluZSBidGVzdCh4KSBfX2J1aWx0aW5fY29uc3RhbnRfcCh4KSA/ICJidWlsdGluLlxuIiA6
ICJub3JtYWwuXG4iCgppbnQgbWFpbih2b2lkKQp7CglpbnQgc2l6ZSA9IHNpemVvZihpbnQpOwoJ
cHJpbnRmKGJ0ZXN0KHNpemUpKTsKCXByaW50ZihidGVzdChzaXplKSk7Cn0K