git: openjdk/jdk17u-dev: 8275847: Scheduling fails with "too many D-U pinch points" on small method

[Goetz Lindenmaier]

Changeset: ff3eec18
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2022-02-03 08:34:35 +0000
URL:       https://git.openjdk.java.net/jdk17u-dev/commit/ff3eec181b1ddbda0f1aa9f274b5069d8d4d654e

8275847: Scheduling fails with "too many D-U pinch points" on small method

Backport-of: 3934fe54b4c3e51add6d3fe1f145e5aebfe3b2fc

! src/hotspot/cpu/x86/vmreg_x86.hpp
! src/hotspot/share/opto/buildOopMap.cpp
! src/hotspot/share/opto/output.cpp
+ test/hotspot/jtreg/compiler/c2/irTests/TestScheduleSmallMethod.java