git: openjdk/mobile: 8233820: Test crashed with assert(phi->operand_count() != 1 || phi->subst() != phi) failed: missed trivial simplification

[duke]

Changeset: 7c242c70
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2019-11-12 16:13:16 +0000
URL:       https://git.openjdk.java.net/mobile/commit/7c242c70

8233820: Test crashed with assert(phi->operand_count() != 1 || phi->subst() != phi) failed: missed trivial simplification

Verification code needs to skip illegal phi functions.

Reviewed-by: thartmann, vlivanov

! src/hotspot/share/c1/c1_GraphBuilder.cpp
! src/hotspot/share/c1/c1_Optimizer.cpp