Enhance initial global value setting.
authorAndrew MacLeod <amacleod@redhat.com>
Mon, 26 Apr 2021 21:41:22 +0000 (17:41 -0400)
committerAndrew MacLeod <amacleod@redhat.com>
Fri, 7 May 2021 18:53:44 +0000 (14:53 -0400)
commit1416a1434c43de0b93b313644f932ac024a94773
treee14e4694f814a3fddf533a1406962251ffda9208
parente2bc5b6c04df820017c497a2578bd3c4c7b6c89b
Enhance initial global value setting.

Incorporate code from vr_values to get safe initial parameter values.
If this is a local automatic which is used before defined, use UNDEFINED.

* gimple-range.h (gimple_range_global): Pick up parameter initial
values, and use-before defined locals are UNDEFINED.
gcc/gimple-range.h