gcc: reduce genautomata memory footprint for ARM - bug 70473

packages/lang/gcc/patches/gcc-reduce-genautomata-memory-footprint-for-arm-bug-70473.patch

@@ -0,0 +1,42 @@
+--- trunk/gcc/config/arm/cortex-a8-neon.md	2016/08/26 10:22:08	239771
++++ trunk/gcc/config/arm/cortex-a8-neon.md	2016/08/26 10:23:20	239772
+@@ -357,30 +357,34 @@
+        (eq_attr "type" "fmuls"))
+   "cortex_a8_vfp,cortex_a8_vfplite*11")
+ 
++;; Don't model a reservation for more than 15 cycles as this explodes the
++;; state space of the automaton for little gain.  It is unlikely that the
++;; scheduler will find enough instructions to hide the full latency of the
++;; instructions.
+ (define_insn_reservation "cortex_a8_vfp_muld" 17
+   (and (eq_attr "tune" "cortexa8")
+        (eq_attr "type" "fmuld"))
+-  "cortex_a8_vfp,cortex_a8_vfplite*16")
++  "cortex_a8_vfp,cortex_a8_vfplite*15")
+ 
+ (define_insn_reservation "cortex_a8_vfp_macs" 21
+   (and (eq_attr "tune" "cortexa8")
+        (eq_attr "type" "fmacs,ffmas"))
+-  "cortex_a8_vfp,cortex_a8_vfplite*20")
++  "cortex_a8_vfp,cortex_a8_vfplite*15")
+ 
+ (define_insn_reservation "cortex_a8_vfp_macd" 26
+   (and (eq_attr "tune" "cortexa8")
+        (eq_attr "type" "fmacd,ffmad"))
+-  "cortex_a8_vfp,cortex_a8_vfplite*25")
++  "cortex_a8_vfp,cortex_a8_vfplite*15")
+ 
+ (define_insn_reservation "cortex_a8_vfp_divs" 37
+   (and (eq_attr "tune" "cortexa8")
+        (eq_attr "type" "fdivs, fsqrts"))
+-  "cortex_a8_vfp,cortex_a8_vfplite*36")
++  "cortex_a8_vfp,cortex_a8_vfplite*15")
+ 
+ (define_insn_reservation "cortex_a8_vfp_divd" 65
+   (and (eq_attr "tune" "cortexa8")
+        (eq_attr "type" "fdivd, fsqrtd"))
+-  "cortex_a8_vfp,cortex_a8_vfplite*64")
++  "cortex_a8_vfp,cortex_a8_vfplite*15")
+ 
+ ;; Comparisons can actually take 7 cycles sometimes instead of four,
+ ;; but given all the other instructions lumped into type=ffarith that