> Manual commit: Apply Intel PGO, now have 740 points in microbench.

U201614531
recolic
Linux RECOLICPC 5.4.6-arch3-1 #1 SMP PREEMPT Tue, 24 Dec 2019 04:36:53 +0000 x86_64 GNU/Linux
 00:33:58 up 2 days,  6:07,  1 user,  load average: 0.85, 1.08, 1.11
ca08ae605f60410b9e00c6be2fc3d23828bc868b

nemu/Makefile

@@ -16,10 +16,12 @@ include Makefile.git
 .DEFAULT_GOAL = app
 
 # Compilation flags
-CXX ?= g++
+CXX = icpc
 LD = $(CXX)
+EXTRA_FLAGS ?= -prof-use
 INCLUDES  = $(addprefix -I, $(INC_DIR))
-CFLAGS   += -O3 -MMD -Wall -ggdb $(INCLUDES) -fomit-frame-pointer -std=c++17
+CFLAGS   += -O3 -MMD -Wall $(INCLUDES) -fomit-frame-pointer -std=c++17
+CFLAGS   += -no-ansi-alias -DDISABLE_MMIO -no-complex-limited-range -qopt-prefetch=2 $(EXTRA_FLAGS)
 # CFLAGS   += -DDIFF_TEST_QEMU
 
 # Source code generation before any targets.