hg: valhalla/valhalla: 8227494: [lworld][c1] Optimize withfield bytecode into putfield

[ioi.lam at oracle.com]

Changeset: ab1e0ac6b32f
Author:    iklam
Date:      2019-07-25 13:34 -0700
URL:       https://hg.openjdk.java.net/valhalla/valhalla/rev/ab1e0ac6b32f

8227494: [lworld][c1] Optimize withfield bytecode into putfield
Reviewed-by: thartmann

! src/hotspot/share/c1/c1_GraphBuilder.cpp
! src/hotspot/share/c1/c1_GraphBuilder.hpp
! src/hotspot/share/c1/c1_Instruction.hpp
! src/hotspot/share/c1/c1_InstructionPrinter.cpp
! test/hotspot/jtreg/compiler/valhalla/valuetypes/TestOnStackReplacement.java
+ test/hotspot/jtreg/compiler/valhalla/valuetypes/TestWithfieldC1.java
! test/hotspot/jtreg/compiler/valhalla/valuetypes/ValueTypeTest.java