AArch64: Switch off early scheduling

The early scheduler takes up ~33% of the total build time, however it doesn't
provide a meaningful performance gain.  This is partly because modern OoO cores
need far less scheduling, partly because the scheduler tends to create many
unnecessary spills by increasing register pressure.  Building applications
56% faster is far more useful than ~0.1% improvement on SPEC, so switch off
early scheduling on AArch64.  Codesize reduces by ~0.2%.

Fix various tests that depend on scheduling by explicitly adding -fschedule-insns.

gcc:
	* common/config/aarch64/aarch64-common.cc: Switch off fschedule_insns.

gcc/testsuite:
	* gcc.dg/guality/pr36728-3.c: Remove XFAIL.
	* gcc.dg/guality/pr68860-1.c: Likewise.
	* gcc.dg/guality/pr68860-2.c: Likewise.
	* gcc.target/aarch64/ldp_aligned.c: Fix test.
	* gcc.target/aarch64/ldp_always.c: Likewise.
	* gcc.target/aarch64/ldp_stp_10.c: Add -fschedule-insns.
	* gcc.target/aarch64/ldp_stp_12.c: Likewise.
	* gcc.target/aarch64/ldp_stp_13.c: Remove test.
	* gcc.target/aarch64/ldp_stp_21.c: Add -fschedule-insns.
	* gcc.target/aarch64/ldp_stp_8.c: Likewise.
	* gcc.target/aarch64/ldp_vec_v2sf.c: Likewise.
	* gcc.target/aarch64/ldp_vec_v2si.c: Likewise.
	* gcc.target/aarch64/test_frame_16.c: Fix test.
	* gcc.target/aarch64/sve/vcond_12.c: Add -fschedule-insns.
	* gcc.target/aarch64/sve/acle/general/ldff1_3.c: Likewise.

16 files changed, 18 insertions, 77 deletions

diff --git a/gcc/common/config/aarch64/aarch64-common.cc b/gcc/common/config/aarch64/aarch64-common.cc
index dd94134..92df8b6 100644
--- a/gcc/common/config/aarch64/aarch64-common.cc
+++ b/gcc/common/config/aarch64/aarch64-common.cc
@@ -53,6 +53,8 @@ static const struct default_options aarch_option_optimization_table[] =
     { OPT_LEVELS_ALL, OPT_fomit_frame_pointer, NULL, 0 },
     /* Enable -fsched-pressure by default when optimizing.  */
     { OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 },
+    /* Disable early scheduling due to high compile-time overheads.  */
+    { OPT_LEVELS_ALL, OPT_fschedule_insns, NULL, 0 },
     /* Enable redundant extension instructions removal at -O2 and higher.  */
     { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_mearly_ra_, NULL, AARCH64_EARLY_RA_ALL },
diff --git a/gcc/testsuite/gcc.dg/guality/pr36728-3.c b/gcc/testsuite/gcc.dg/guality/pr36728-3.c
index 589009b..4700d50 100644
--- a/gcc/testsuite/gcc.dg/guality/pr36728-3.c
+++ b/gcc/testsuite/gcc.dg/guality/pr36728-3.c
@@ -30,7 +30,7 @@ foo (int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7)
 /* { dg-final { gdb-test 14 "arg5" "5" } } */
 /* { dg-final { gdb-test 14 "arg6" "6" } } */
 /* { dg-final { gdb-test 14 "arg7" "30" } } */
-/* { dg-final { gdb-test 14 "y" "2" { xfail { aarch64*-*-* && { any-opts "-O3" } } } } } */
+/* { dg-final { gdb-test 14 "y" "2" } } */
 /* { dg-final { gdb-test 16 "arg1" "1" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg2" "2" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg3" "3" } } */
diff --git a/gcc/testsuite/gcc.dg/guality/pr68860-1.c b/gcc/testsuite/gcc.dg/guality/pr68860-1.c
index bbd9d6e..8c8d835 100644
--- a/gcc/testsuite/gcc.dg/guality/pr68860-1.c
+++ b/gcc/testsuite/gcc.dg/guality/pr68860-1.c
@@ -31,7 +31,7 @@ foo (int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7, int a
 /* { dg-final { gdb-test 14 "arg6" "6" } } */
 /* { dg-final { gdb-test 14 "arg7" "30" } } */
 /* { dg-final { gdb-test 14 "arg8" "7" } } */
-/* { dg-final { gdb-test 14 "y" "2" { xfail { aarch64*-*-* && { { any-opts "-O2" "-O3" } && { no-opts "-flto" } } } } } } */
+/* { dg-final { gdb-test 14 "y" "2" } } */
 /* { dg-final { gdb-test 16 "arg1" "1" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg2" "2" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg3" "3" } } */
diff --git a/gcc/testsuite/gcc.dg/guality/pr68860-2.c b/gcc/testsuite/gcc.dg/guality/pr68860-2.c
index a18a04e..070efbc 100644
--- a/gcc/testsuite/gcc.dg/guality/pr68860-2.c
+++ b/gcc/testsuite/gcc.dg/guality/pr68860-2.c
@@ -31,7 +31,7 @@ foo (int arg1, int arg2, int arg3, int arg4, int arg5, int arg6, int arg7, int a
 /* { dg-final { gdb-test 14 "arg6" "6" } } */
 /* { dg-final { gdb-test 14 "arg7" "30" } } */
 /* { dg-final { gdb-test 14 "arg8" "7" } } */
-/* { dg-final { gdb-test 14 "y" "2" { xfail { aarch64*-*-* && { any-opts "-O3" } } } } } */
+/* { dg-final { gdb-test 14 "y" "2" } } */
 /* { dg-final { gdb-test 16 "arg1" "1" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg2" "2" { target { ! "s390*-*-*" } } } } */
 /* { dg-final { gdb-test 16 "arg3" "3" } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_aligned.c b/gcc/testsuite/gcc.target/aarch64/ldp_aligned.c
index 75495d7..8ec2b03 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_aligned.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_aligned.c
@@ -14,25 +14,11 @@ TYPE ldp_aligned_##TYPE(char* ptr){ \
     return a_0 + a_1; \
 }
 
-#define LDP_TEST_ADJUST_ALIGNED(TYPE) \
-TYPE ldp_aligned_adjust_##TYPE(char* ptr){ \
-    TYPE a_0, a_1, a_2, a_3, a_4; \
-    TYPE *arr = (TYPE*) ((uintptr_t)ptr & ~(2 * 8 * _Alignof(TYPE) - 1)); \
-    a_0 = arr[100]; \
-    a_1 = arr[101]; \
-    a_2 = arr[102]; \
-    a_3 = arr[103]; \
-    a_4 = arr[110]; \
-    return a_0 + a_1 + a_2 + a_3 + a_4; \
-}
-
 LDP_TEST_ALIGNED(int32_t);
 LDP_TEST_ALIGNED(int64_t);
 LDP_TEST_ALIGNED(v4si);
-LDP_TEST_ADJUST_ALIGNED(int32_t);
-LDP_TEST_ADJUST_ALIGNED(int64_t);
 
-/* { dg-final { scan-assembler-times "ldp\tw\[0-9\]+, w\[0-9\]" 3 } } */
-/* { dg-final { scan-assembler-times "ldp\tx\[0-9\]+, x\[0-9\]" 3 } } */
+/* { dg-final { scan-assembler-times "ldp\tw\[0-9\]+, w\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "ldp\tx\[0-9\]+, x\[0-9\]" 1 } } */
 /* { dg-final { scan-assembler-times "ldp\tq\[0-9\]+, q\[0-9\]" 1 } } */
 
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_always.c b/gcc/testsuite/gcc.target/aarch64/ldp_always.c
index 9cada57..5ffb98a 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_always.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_always.c
@@ -24,43 +24,14 @@ TYPE ldp_unaligned_##TYPE(char* ptr){ \
     return a_0 + a_1; \
 }
 
-#define LDP_TEST_ADJUST_ALIGNED(TYPE) \
-TYPE ldp_aligned_adjust_##TYPE(char* ptr){ \
-    TYPE a_0, a_1, a_2, a_3, a_4; \
-    TYPE *arr = (TYPE*) ((uintptr_t)ptr & ~(2 * 8 * _Alignof(TYPE) - 1)); \
-    a_0 = arr[100]; \
-    a_1 = arr[101]; \
-    a_2 = arr[102]; \
-    a_3 = arr[103]; \
-    a_4 = arr[110]; \
-    return a_0 + a_1 + a_2 + a_3 + a_4; \
-}
-
-#define LDP_TEST_ADJUST_UNALIGNED(TYPE) \
-TYPE ldp_unaligned_adjust_##TYPE(char* ptr){ \
-    TYPE a_0, a_1, a_2, a_3, a_4; \
-    TYPE *arr = (TYPE*) ((uintptr_t)ptr & ~(2 * 8 * _Alignof(TYPE) - 1)); \
-    TYPE *a = arr+1; \
-    a_0 = a[100]; \
-    a_1 = a[101]; \
-    a_2 = a[102]; \
-    a_3 = a[103]; \
-    a_4 = a[110]; \
-    return a_0 + a_1 + a_2 + a_3 + a_4; \
-}
-
 LDP_TEST_ALIGNED(int32_t);
 LDP_TEST_ALIGNED(int64_t);
 LDP_TEST_ALIGNED(v4si);
 LDP_TEST_UNALIGNED(int32_t);
 LDP_TEST_UNALIGNED(int64_t);
 LDP_TEST_UNALIGNED(v4si);
-LDP_TEST_ADJUST_ALIGNED(int32_t);
-LDP_TEST_ADJUST_ALIGNED(int64_t);
-LDP_TEST_ADJUST_UNALIGNED(int32_t);
-LDP_TEST_ADJUST_UNALIGNED(int64_t);
 
-/* { dg-final { scan-assembler-times "ldp\tw\[0-9\]+, w\[0-9\]" 6 } } */
-/* { dg-final { scan-assembler-times "ldp\tx\[0-9\]+, x\[0-9\]" 6 } } */
+/* { dg-final { scan-assembler-times "ldp\tw\[0-9\]+, w\[0-9\]" 2 } } */
+/* { dg-final { scan-assembler-times "ldp\tx\[0-9\]+, x\[0-9\]" 2 } } */
 /* { dg-final { scan-assembler-times "ldp\tq\[0-9\]+, q\[0-9\]" 2 } } */
 
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_stp_10.c b/gcc/testsuite/gcc.target/aarch64/ldp_stp_10.c
index 31f3929..ac4828a 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_stp_10.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_stp_10.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 int
 load (int *arr)
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_stp_12.c b/gcc/testsuite/gcc.target/aarch64/ldp_stp_12.c
index 718e82b..495e199 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_stp_12.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_stp_12.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 void
 store_offset (int *array, int x, int y)
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_stp_13.c b/gcc/testsuite/gcc.target/aarch64/ldp_stp_13.c
deleted file mode 100644
index 9cc3942..0000000
--- a/gcc/testsuite/gcc.target/aarch64/ldp_stp_13.c
+++ /dev/null
@@ -1,18 +0,0 @@
-/* { dg-do compile } */
-/* { dg-options "-O2 -mabi=ilp32" } */
-
-long long
-load_long (long long int *arr)
-{
-  return arr[400] << 1 + arr[401] << 1 + arr[403] << 1 + arr[404] << 1;
-}
-
-/* { dg-final { scan-assembler-times "ldp\tx\[0-9\]+, x\[0-9\]+, " 2 } } */
-
-int
-load (int *arr)
-{
-  return arr[527] << 1 + arr[400] << 1 + arr[401] << 1 + arr[528] << 1;
-}
-
-/* { dg-final { scan-assembler-times "ldp\tw\[0-9\]+, w\[0-9\]+, " 2 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_stp_21.c b/gcc/testsuite/gcc.target/aarch64/ldp_stp_21.c
index d54c322..ac7bc16 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_stp_21.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_stp_21.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 #pragma GCC target "+nosimd+fp"
 
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_stp_8.c b/gcc/testsuite/gcc.target/aarch64/ldp_stp_8.c
index b256783..2adf151 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_stp_8.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_stp_8.c
@@ -1,4 +1,4 @@
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 typedef float __attribute__ ((vector_size (8))) fvec;
 typedef int __attribute__ ((vector_size (8))) ivec;
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2sf.c b/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2sf.c
index fbdae1c..7a87fe7 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2sf.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2sf.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 typedef float __attribute__((vector_size(8))) vec;
 
diff --git a/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2si.c b/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2si.c
index 7714cd6..068f53e 100644
--- a/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2si.c
+++ b/gcc/testsuite/gcc.target/aarch64/ldp_vec_v2si.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 typedef int __attribute__((vector_size(8))) vec;
 
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/acle/general/ldff1_3.c b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/ldff1_3.c
index 41ad0bc..14eacce 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/acle/general/ldff1_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/acle/general/ldff1_3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2" } */
+/* { dg-options "-O2 -fschedule-insns" } */
 
 #include <arm_sve.h>
 
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/vcond_12.c b/gcc/testsuite/gcc.target/aarch64/sve/vcond_12.c
index de650bf..59dcc0a 100644
--- a/gcc/testsuite/gcc.target/aarch64/sve/vcond_12.c
+++ b/gcc/testsuite/gcc.target/aarch64/sve/vcond_12.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -ftree-vectorize -ffast-math" } */
+/* { dg-options "-O2 -ftree-vectorize -ffast-math -fschedule-insns" } */
 
 #include <stdint.h>
 
diff --git a/gcc/testsuite/gcc.target/aarch64/test_frame_16.c b/gcc/testsuite/gcc.target/aarch64/test_frame_16.c
index 28f3826..0f67458 100644
--- a/gcc/testsuite/gcc.target/aarch64/test_frame_16.c
+++ b/gcc/testsuite/gcc.target/aarch64/test_frame_16.c
@@ -17,7 +17,7 @@ double vararg_outgoing (int x1, ...)
   double a1 = x1, a2 = x1 * 2, a3 = x1 * 3, a4 = x1 * 4, a5 = x1 * 5, a6 = x1 * 6;
   __builtin_va_list vl;
   __builtin_va_start (vl, x1);
-  outgoing (vl, a1, a2, a3, a4, a5, a6, REP64 (1));
+  outgoing (vl, a1, a2, a3, a4, a5, a6, REP64 (1), REP8 (1));
   __builtin_va_end (vl);
   return a1 + a2 + a3 + a4 + a5 + a6;
 }