Remove graphite loop optimizations

Author: firasuke

config.nims

@@ -6,9 +6,9 @@ switch("os", "linux")
 switch("cpu", "amd64")
 switch(
   "passC",
-  "-O2 -fgraphite-identity -floop-nest-optimize -flto=auto -flto-compression-level=3 -fuse-linker-plugin -fstack-protector-strong -fstack-clash-protection -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-plt -march=x86-64-v3 -malign-data=cacheline -mtls-dialect=gnu2",
+  "-O2 -flto=auto -flto-compression-level=3 -fuse-linker-plugin -fstack-protector-strong -fstack-clash-protection -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-plt -march=x86-64-v3 -malign-data=cacheline -mtls-dialect=gnu2",
 )
 switch(
   "passL",
-  "-Wl,-O1,-s,-z,noexecstack,-z,now,-z,pack-relative-relocs,-z,relro,-z,x86-64-v3,--as-needed,--gc-sections,--sort-common,--hash-style=gnu -Wno-stringop-overflow -O2 -fgraphite-identity -floop-nest-optimize -flto=auto -flto-compression-level=3 -fuse-linker-plugin -fstack-protector-strong -fstack-clash-protection -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-plt -march=x86-64-v3 -malign-data=cacheline -mtls-dialect=gnu2",
+  "-Wl,-O1,-s,-z,noexecstack,-z,now,-z,pack-relative-relocs,-z,relro,-z,x86-64-v3,--as-needed,--gc-sections,--sort-common,--hash-style=gnu -Wno-stringop-overflow -O2 -flto=auto -flto-compression-level=3 -fuse-linker-plugin -fstack-protector-strong -fstack-clash-protection -fno-unwind-tables -fno-asynchronous-unwind-tables -fno-plt -march=x86-64-v3 -malign-data=cacheline -mtls-dialect=gnu2",
 )

src/packages.nim

@@ -229,7 +229,7 @@ proc buildPackages*(packages: openArray[string], bootstrap = false, stage = nati
         putEnv(i, j)
 
     let cflags =
-      "-pipe -O2 -fgraphite-identity -floop-nest-optimize" & (
+      "-pipe -O2" & (
         if "no-lto" notin package.opt:
           " -flto=auto -flto-compression-level=3 -fuse-linker-plugin "
         else: