Verilator 4.204 2021-06-12 released

[wsnyder]

Verilator 4.204 2021-06-12

Minor:

• Add 'make ccache-report' (verilator/verilator#3011). [Geza Lore]
• Add --reloop-limit argument (verilator/verilator#2943) (verilator/verilator#2960). [Geza Lore]
• Add --expand-limit argument (verilator/verilator#3005). [Julien Margetts]
• Add TRACE_THREADS to CMake (verilator/verilator#2934). [Jonathan Drolet]
• Optimize large lookup tables to static data (verilator/verilator#2925). [Geza Lore]
• Optimize reloop to accept constant index offsets (verilator/verilator#2939). [Geza Lore]
• Split always blocks to better respect --output-split-cfuncs. [Geza Lore]
• Support ignoring "`pragma protect ..." (verilator/verilator#2886). [Udi Finkelstein]
• Support --trace-fst for SystemC with CMake (verilator/verilator#2927). [Jonathan Drolet]
• Update cmake latest C++ Standard Compilation flag (verilator/verilator#2951). [Ameya Vikram Singh]
• Prep work towards better ccache hashing/performance. [Geza Lore]
• Fix assertion failure in bitOpTree optimization (verilator/verilator#2891) (verilator/verilator#2899). [Raynard Qiao]
• Fix DPI functions not seen as vpiModule (verilator/verilator#2893). [Todd Strader]
• Fix bounds check in VL_SEL_IWII (verilator/verilator#2910). [Krzysztof Bieganski]
• Fix slowdown in elaboration (verilator/verilator#2911). [Nathan Graybeal]
• Fix initialization of assoc in assoc array (verilator/verilator#2914). [myftptoyman]
• Fix make support for gmake 3.x (verilator/verilator#2920) (verilator/verilator#2921). [Philipp Wagner]
• Fix VPI memory access for packed arrays (verilator/verilator#2922). [Todd Strader]
• Fix MCD close also closing stdout (verilator/verilator#2931). [Alexander Grobman]
• Fix split procedures to better respect --output-split-cfuncs (verilator/verilator#2942). [Geza Lore]
• Fix to emit 'else if' without nesting (verilator/verilator#2944). [Geza Lore]
• Fix part select issues in LATCH warning (verilator/verilator#2948) (verilator/verilator#2938). [Julien Margetts]
• Fix to not emit empty files with low split limits (verilator/verilator#2961). [Geza Lore]
• Fix merging of assignments in C++ code (verilator/verilator#2970). [Ruper Swarbrick]
• Fix unused variable warnings (verilator/verilator#2991). [Pieter Kapsenberg]
• Fix --protect-ids when using SV classes (verilator/verilator#2994). [Geza Lore]
• Fix constant function calls with uninit value (verilator/verilator#2995). [yanx21]
• Fix Makefiles to support Windows EXEEXT usage (verilator/verilator#3008). [Miodrag Milanovic]