GCC -O2 Regression
Intel Xeon Silver 4216 testing with a TYAN S7100AG2NR (V4.02 BIOS) and ASPEED on Debian 10 via the Phoronix Test Suite.


GCC 11.0.0 20200727: 

	Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

	OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 11.0.0 20200727, File-System: ext4, Screen Resolution: 1024x768

GCC 10.2.0: 

	Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

	OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 10.2.0, File-System: ext4, Screen Resolution: 1024x768

GCC 9.3.0: 

	Processor: Intel Xeon Silver 4216 @ 3.20GHz (16 Cores / 32 Threads), Motherboard: TYAN S7100AG2NR (V4.02 BIOS), Chipset: Intel Sky Lake-E DMI3 Registers, Memory: 24GB, Disk: 240GB Corsair Force MP500, Graphics: ASPEED, Audio: Realtek ALC892, Network: 2 x Intel I350

	OS: Debian 10, Kernel: 4.19.0-9-amd64 (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768


SciMark 2.0
Computational Test: Sparse Matrix Multiply
Mflops > Higher Is Better
GCC 11.0.0 20200727 . 2278.14 |==========================================
GCC 10.2.0 .......... 1977.32 |====================================
GCC 9.3.0 ........... 2607.12 |================================================


SciMark 2.0
Computational Test: Composite
Mflops > Higher Is Better
GCC 11.0.0 20200727 . 1467.19 |============================================
GCC 10.2.0 .......... 1404.91 |===========================================
GCC 9.3.0 ........... 1585.12 |================================================


SciMark 2.0
Computational Test: Dense LU Matrix Factorization
Mflops > Higher Is Better
GCC 11.0.0 20200727 . 2985.83 |============================================
GCC 10.2.0 .......... 2981.53 |============================================
GCC 9.3.0 ........... 3251.71 |================================================


Coremark 1.0
CoreMark Size 666 - Iterations Per Second
Iterations/Sec > Higher Is Better
GCC 11.0.0 20200727 . 413969.55 |===========================================
GCC 10.2.0 .......... 440038.20 |=============================================
GCC 9.3.0 ........... 445965.55 |==============================================