cif-code.def (MAX_INLINE_INSNS_SINGLE_O2_LIMIT, [...]): New.

	* cif-code.def (MAX_INLINE_INSNS_SINGLE_O2_LIMIT,
	MAX_INLINE_INSNS_AUTO_O2_LIMIT): New.
	* ipa-inline.c (inline_insns_single, inline_insns_auto): New functions.
	(can_inline_edge_by_limits_p): Use it.
	(big_speedup_p): Use PARAM_INLINE_MIN_SPEEDUP_O2.
	(want_inline_small_function_p): Use O2 bounds.
	(edge_badness): LIkewise.
	* opts.c (default_options): Add OPT_finline_functions.
	* params.def (PARAM_INLINE_MIN_SPEEDUP_O2,
	PARAM_MAX_INLINE_INSNS_SINGLE_O2, PARAM_MAX_INLINE_INSNS_AUTO_O2):
	New parameters.

	* g++.dg/tree-ssa/pr53844.C: Add -fno-inline-functions --param
	max-inline-insns-single-O2=200.
	* gcc.c-torture/execute/builtins/builtins.exp: Add
	-fno-inline-functions to additional_flags.
	* gcc.dg/ipa/inline-7.c: Add -fno-inline-functions.
	* gcc.dg/optimize-bswapsi-5.c: Add -fno-inline-functions.
	* gcc.dg/tree-ssa/ssa-thread-12.c: Add --param
	early-inlining-insns-O2=14 -fno-inline-functions; revert previous
	change.
	* gcc.dg/winline-3.c: Use --param max-inline-insns-single-O2=1
	--param inline-min-speedup-O2=100
	instead of --param max-inline-insns-single=1 --param
	inline-min-speedup=100

	* invoke.texi (-finline-functions): Update documentation.
	(max-inline-insns-single-O2, max-inline-insns-auto-O2,
	inline-min-speedup-O2): Document.
	(early-inlining-insns-O2): Simplify docs.

From-SVN: r276469

gcc/cif-code.def

@@ -70,8 +70,12 @@ DEFCIFCODE(LARGE_STACK_FRAME_GROWTH_LIMIT, CIF_FINAL_NORMAL,
 	   N_("--param large-stack-frame-growth limit reached"))
 DEFCIFCODE(MAX_INLINE_INSNS_SINGLE_LIMIT, CIF_FINAL_NORMAL,
 	   N_("--param max-inline-insns-single limit reached"))
+DEFCIFCODE(MAX_INLINE_INSNS_SINGLE_O2_LIMIT, CIF_FINAL_NORMAL,
+	   N_("--param max-inline-insns-single-O2 limit reached"))
 DEFCIFCODE(MAX_INLINE_INSNS_AUTO_LIMIT, CIF_FINAL_NORMAL,
 	   N_("--param max-inline-insns-auto limit reached"))
+DEFCIFCODE(MAX_INLINE_INSNS_AUTO_O2_LIMIT, CIF_FINAL_NORMAL,
+	   N_("--param max-inline-insns-auto-O2 limit reached"))
 DEFCIFCODE(INLINE_UNIT_GROWTH_LIMIT, CIF_FINAL_NORMAL,
 	   N_("--param inline-unit-growth limit reached"))
 

gcc/doc/invoke.texi

@@ -8346,6 +8346,7 @@ also turns on the following optimization flags:
 -ffinite-loops @gol
 -fgcse  -fgcse-lm  @gol
 -fhoist-adjacent-loads @gol
+-finline-functions @gol
 -finline-small-functions @gol
 -findirect-inlining @gol
 -fipa-bit-cp  -fipa-cp  -fipa-icf @gol
@@ -8379,7 +8380,6 @@ by @option{-O2} and also turns on the following optimization flags:
 
 @c Please keep the following list alphabetized!
 @gccoptlist{-fgcse-after-reload @gol
--finline-functions @gol
 -fipa-cp-clone
 -floop-interchange @gol
 -floop-unroll-and-jam @gol
@@ -8559,7 +8559,7 @@ If all calls to a given function are integrated, and the function is
 declared @code{static}, then the function is normally not output as
 assembler code in its own right.
 
-Enabled at levels @option{-O3}, @option{-Os}.  Also enabled
+Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.  Also enabled
 by @option{-fprofile-use} and @option{-fauto-profile}.
 
 @item -finline-functions-called-once
@@ -11175,19 +11175,30 @@ when modulo scheduling a loop.  Larger values can exponentially increase
 compilation time.
 
 @item max-inline-insns-single
-Several parameters control the tree inliner used in GCC@.
-This number sets the maximum number of instructions (counted in GCC's
-internal representation) in a single function that the tree inliner
-considers for inlining.  This only affects functions declared
-inline and methods implemented in a class declaration (C++).
+@item max-inline-insns-single-O2
+Several parameters control the tree inliner used in GCC@.  This number sets the
+maximum number of instructions (counted in GCC's internal representation) in a
+single function that the tree inliner considers for inlining.  This only
+affects functions declared inline and methods implemented in a class
+declaration (C++). 
+
+For functions compiled with optimization levels
+@option{-O3} and @option{-Ofast} parameter @option{max-inline-insns-single} is
+applied. In other cases @option{max-inline-insns-single-O2} is applied.
+
 
 @item max-inline-insns-auto
+@item max-inline-insns-auto-O2
 When you use @option{-finline-functions} (included in @option{-O3}),
 a lot of functions that would otherwise not be considered for inlining
 by the compiler are investigated.  To those functions, a different
 (more restrictive) limit compared to functions declared inline can
 be applied.
 
+For functions compiled with optimization levels
+@option{-O3} and @option{-Ofast} parameter @option{max-inline-insns-auto} is
+applied. In other cases @option{max-inline-insns-auto-O2} is applied.
+
 @item max-inline-insns-small
 This is bound applied to calls which are considered relevant with
 @option{-finline-small-functions}.
@@ -11210,11 +11221,16 @@ Same as @option{--param uninlined-function-insns} and
 @option{--param uninlined-function-time} but applied to function thunks
 
 @item inline-min-speedup
+@item inline-min-speedup-O2
 When estimated performance improvement of caller + callee runtime exceeds this
 threshold (in percent), the function can be inlined regardless of the limit on
 @option{--param max-inline-insns-single} and @option{--param
 max-inline-insns-auto}.
 
+For functions compiled with optimization levels
+@option{-O3} and @option{-Ofast} parameter @option{inline-min-speedup} is
+applied. In other cases @option{inline-min-speedup-O2} is applied.
+
 @item large-function-insns
 The limit specifying really large functions.  For functions larger than this
 limit after inlining, inlining is constrained by
@@ -11291,17 +11307,14 @@ recursion depth can be guessed from the probability that function recurses
 via a given call expression.  This parameter limits inlining only to call
 expressions whose probability exceeds the given threshold (in percents).
 
+@item early-inlining-insns
 @item early-inlining-insns-O2
 Specify growth that the early inliner can make.  In effect it increases
 the amount of inlining for code having a large abstraction penalty.
-This is applied to functions compiled with @option{-O1} or @option{-O2}
-optimization levels.
 
-@item early-inlining-insns
-Specify growth that the early inliner can make.  In effect it increases
-the amount of inlining for code having a large abstraction penalty.
-This is applied to functions compiled with @option{-O3} or @option{-Ofast}
-optimization levels.
+For functions compiled with optimization levels
+@option{-O3} and @option{-Ofast} parameter @option{early-inlining-insns} is
+applied. In other cases @option{early-inlining-insns-O2} is applied.
 
 @item max-early-inliner-iterations
 Limit of iterations of the early inliner.  This basically bounds

gcc/ipa-inline.c

@@ -390,6 +390,28 @@ can_inline_edge_p (struct cgraph_edge *e, bool report,
   return inlinable;
 }
 
+/* Return inlining_insns_single limit for function N */
+
+static int
+inline_insns_single (cgraph_node *n)
+{
+  if (opt_for_fn (n->decl, optimize >= 3))
+    return PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE);
+  else
+    return PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE_O2);
+}
+
+/* Return inlining_insns_auto limit for function N */
+
+static int
+inline_insns_auto (cgraph_node *n)
+{
+  if (opt_for_fn (n->decl, optimize >= 3))
+    return PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO);
+  else
+    return PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO_O2);
+}
+
 /* Decide if we can inline the edge and possibly update
    inline_failed reason.  
    We check whether inlining is possible at all and whether
@@ -532,8 +554,8 @@ can_inline_edge_by_limits_p (struct cgraph_edge *e, bool report,
 	  int growth = estimate_edge_growth (e);
 	  if (growth > PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SIZE)
 	      && (!DECL_DECLARED_INLINE_P (callee->decl)
-		  && growth >= MAX (MAX_INLINE_INSNS_SINGLE,
-				    MAX_INLINE_INSNS_AUTO)))
+		  && growth >= MAX (inline_insns_single (caller),
+				    inline_insns_auto (caller))))
 	    {
 	      e->inline_failed = CIF_OPTIMIZATION_MISMATCH;
 	      inlinable = false;
@@ -745,9 +767,14 @@ big_speedup_p (struct cgraph_edge *e)
   sreal spec_time = estimate_edge_time (e, &unspec_time);
   sreal time = compute_uninlined_call_time (e, unspec_time);
   sreal inlined_time = compute_inlined_call_time (e, spec_time);
+  cgraph_node *caller = e->caller->global.inlined_to
+		        ? e->caller->global.inlined_to
+		        : e->caller;
+  int limit = opt_for_fn (caller->decl, optimize) >= 3
+	      ? PARAM_VALUE (PARAM_INLINE_MIN_SPEEDUP)
+	      : PARAM_VALUE (PARAM_INLINE_MIN_SPEEDUP_O2);
 
-  if ((time - inlined_time) * 100
-      > (sreal) (time * PARAM_VALUE (PARAM_INLINE_MIN_SPEEDUP)))
+  if ((time - inlined_time) * 100 > time * limit)
     return true;
   return false;
 }
@@ -781,20 +808,29 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
 	   && (!e->count.ipa ().initialized_p () || !e->maybe_hot_p ()))
 	   && ipa_fn_summaries->get (callee)->min_size
 		- ipa_call_summaries->get (e)->call_stmt_size
-	      > MAX (MAX_INLINE_INSNS_SINGLE, MAX_INLINE_INSNS_AUTO))
+	      > MAX (inline_insns_single (e->caller),
+		     inline_insns_auto (e->caller)))
     {
+      if (opt_for_fn (e->caller->decl, optimize) >= 3)
         e->inline_failed = CIF_MAX_INLINE_INSNS_AUTO_LIMIT;
+      else
+        e->inline_failed = CIF_MAX_INLINE_INSNS_AUTO_O2_LIMIT;
       want_inline = false;
     }
   else if ((DECL_DECLARED_INLINE_P (callee->decl)
 	    || e->count.ipa ().nonzero_p ())
 	   && ipa_fn_summaries->get (callee)->min_size
 		- ipa_call_summaries->get (e)->call_stmt_size
-	      > 16 * MAX_INLINE_INSNS_SINGLE)
+	      > 16 * inline_insns_single (e->caller))
     {
+      if (opt_for_fn (e->caller->decl, optimize) >= 3)
 	e->inline_failed = (DECL_DECLARED_INLINE_P (callee->decl)
 			    ? CIF_MAX_INLINE_INSNS_SINGLE_LIMIT
 			    : CIF_MAX_INLINE_INSNS_AUTO_LIMIT);
+      else
+	e->inline_failed = (DECL_DECLARED_INLINE_P (callee->decl)
+			    ? CIF_MAX_INLINE_INSNS_SINGLE_O2_LIMIT
+			    : CIF_MAX_INLINE_INSNS_AUTO_O2_LIMIT);
       want_inline = false;
     }
   else
@@ -808,15 +844,18 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
       /* Apply MAX_INLINE_INSNS_SINGLE limit.  Do not do so when
 	 hints suggests that inlining given function is very profitable.  */
       else if (DECL_DECLARED_INLINE_P (callee->decl)
-	       && growth >= MAX_INLINE_INSNS_SINGLE
-	       && (growth >= MAX_INLINE_INSNS_SINGLE * 16
+	       && growth >= inline_insns_single (e->caller)
+	       && (growth >= inline_insns_single (e->caller) * 16
 		   || (!(hints & (INLINE_HINT_indirect_call
 				  | INLINE_HINT_known_hot
 				  | INLINE_HINT_loop_iterations
 				  | INLINE_HINT_loop_stride))
 		       && !(big_speedup = big_speedup_p (e)))))
 	{
+	  if (opt_for_fn (e->caller->decl, optimize) >= 3)
             e->inline_failed = CIF_MAX_INLINE_INSNS_SINGLE_LIMIT;
+	  else
+            e->inline_failed = CIF_MAX_INLINE_INSNS_SINGLE_O2_LIMIT;
 	  want_inline = false;
 	}
       else if (!DECL_DECLARED_INLINE_P (callee->decl)
@@ -824,7 +863,7 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
 	       && growth >= PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SMALL))
 	{
 	  /* growth_likely_positive is expensive, always test it last.  */
-	  if (growth >= MAX_INLINE_INSNS_SINGLE
+          if (growth >= inline_insns_single (e->caller)
 	      || growth_likely_positive (callee, growth))
 	    {
               e->inline_failed = CIF_NOT_DECLARED_INLINED;
@@ -839,27 +878,27 @@ want_inline_small_function_p (struct cgraph_edge *e, bool report)
 	       && growth >= ((hints & (INLINE_HINT_indirect_call
 				       | INLINE_HINT_loop_iterations
 				       | INLINE_HINT_loop_stride))
-			     ? MAX (MAX_INLINE_INSNS_AUTO,
-				    MAX_INLINE_INSNS_SINGLE)
-			     : MAX_INLINE_INSNS_AUTO)
+			     ? MAX (inline_insns_auto (e->caller),
+				    inline_insns_single (e->caller))
+			     : inline_insns_auto (e->caller))
 	       && !(big_speedup == -1 ? big_speedup_p (e) : big_speedup))
 	{
 	  /* growth_likely_positive is expensive, always test it last.  */
-	  if (growth >= MAX_INLINE_INSNS_SINGLE
+          if (growth >= inline_insns_single (e->caller)
 	      || growth_likely_positive (callee, growth))
 	    {
+	      if (opt_for_fn (e->caller->decl, optimize) >= 3)
 		e->inline_failed = CIF_MAX_INLINE_INSNS_AUTO_LIMIT;
+	      else
+		e->inline_failed = CIF_MAX_INLINE_INSNS_AUTO_O2_LIMIT;
 	      want_inline = false;
  	    }
 	}
       /* If call is cold, do not inline when function body would grow. */
       else if (!e->maybe_hot_p ()
-	       && (growth >= MAX_INLINE_INSNS_SINGLE
+	       && (growth >= inline_insns_single (e->caller)
 		   || growth_likely_positive (callee, growth)))
 	{
-	  if (e->count.ipa () == profile_count::zero ())
-	    e->inline_failed = CIF_NEVER_CALL;
-	  else
           e->inline_failed = CIF_UNLIKELY_CALL;
 	  want_inline = false;
 	}
@@ -1166,7 +1205,7 @@ edge_badness (struct cgraph_edge *edge, bool dump)
 	      && caller_info->inlinable
 	      && caller_info->size
 		 < (DECL_DECLARED_INLINE_P (caller->decl)
-		    ? MAX_INLINE_INSNS_SINGLE : MAX_INLINE_INSNS_AUTO))
+		    ? inline_insns_single (caller) : inline_insns_auto (caller)))
 	    {
 	      if (dump)
 		fprintf (dump_file,

gcc/opts.c

@@ -527,6 +527,7 @@ static const struct default_options default_options_table[] =
     { OPT_LEVELS_2_PLUS, OPT_ftree_tail_merge, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_ftree_vrp, NULL, 1 },
     { OPT_LEVELS_2_PLUS, OPT_fvect_cost_model_, NULL, VECT_COST_MODEL_CHEAP },
+    { OPT_LEVELS_2_PLUS, OPT_finline_functions, NULL, 1 },
 
     /* -O2 and -Os optimizations.  */
     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_falign_functions, NULL, 1 },
@@ -542,9 +543,6 @@ static const struct default_options default_options_table[] =
 #endif
 
     /* -O3 and -Os optimizations.  */
-    /* Inlining of functions reducing size is a good idea with -Os
-       regardless of them being declared inline.  */
-    { OPT_LEVELS_3_PLUS_AND_SIZE, OPT_finline_functions, NULL, 1 },
 
     /* -O3 optimizations.  */
     { OPT_LEVELS_3_PLUS, OPT_fgcse_after_reload, NULL, 1 },

gcc/params.def

@@ -51,8 +51,13 @@ DEFPARAM (PARAM_PREDICTABLE_BRANCH_OUTCOME,
 
 DEFPARAM (PARAM_INLINE_MIN_SPEEDUP,
 	  "inline-min-speedup",
+	  "The minimal estimated speedup allowing inliner to ignore inline-insns-single and inline-insns-auto with -O3 and -Ofast.",
+	  15, 0, 100)
+
+DEFPARAM (PARAM_INLINE_MIN_SPEEDUP_O2,
+	  "inline-min-speedup-O2",
 	  "The minimal estimated speedup allowing inliner to ignore inline-insns-single and inline-insns-auto.",
-	  15, 0, 0)
+	  30, 0, 100)
 
 /* The single function inlining limit. This is the maximum size
    of a function counted in internal gcc instructions (not in
@@ -67,9 +72,14 @@ DEFPARAM (PARAM_INLINE_MIN_SPEEDUP,
    gets decreased.  */
 DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE,
 	  "max-inline-insns-single",
-	  "The maximum number of instructions in a single function eligible for inlining.",
+	  "The maximum number of instructions in a single function eligible for inlining with -O3 and -Ofast.",
 	  200, 0, 0)
 
+DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE_O2,
+	  "max-inline-insns-single-O2",
+	  "The maximum number of instructions in a single function eligible for inlining.",
+	  30, 0, 0)
+
 /* The single function inlining limit for functions that are
    inlined by virtue of -finline-functions (-O3).
    This limit should be chosen to be below or equal to the limit
@@ -79,9 +89,14 @@ DEFPARAM (PARAM_MAX_INLINE_INSNS_SINGLE,
    The default value is 30.  */
 DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO,
 	  "max-inline-insns-auto",
-	  "The maximum number of instructions when automatically inlining.",
+	  "The maximum number of instructions when automatically inlining with -O3 and -Ofast.",
 	  30, 0, 0)
 
+DEFPARAM (PARAM_MAX_INLINE_INSNS_AUTO_O2,
+	  "max-inline-insns-auto-O2",
+	  "The maximum number of instructions when automatically inlining.",
+	  15, 0, 0)
+
 DEFPARAM (PARAM_MAX_INLINE_INSNS_SMALL,
 	  "max-inline-insns-small",
 	  "The maximum number of instructions when automatically inlining small functions.",

gcc/testsuite/g++.dg/tree-ssa/pr53844.C

 // { dg-do compile }
-// { dg-options "-O2 -fdump-tree-optimized-vops" }
+// { dg-options "-O2 -fdump-tree-optimized-vops -fno-inline-functions --param max-inline-insns-single-O2=200" }
 
 struct VBase;
 

gcc/testsuite/gcc.c-torture/execute/builtins/builtins.exp

@@ -37,7 +37,7 @@ load_lib c-torture.exp
 torture-init
 set-torture-options $C_TORTURE_OPTIONS {{}} $LTO_TORTURE_OPTIONS
 
-set additional_flags "-fno-tree-dse -fno-tree-loop-distribute-patterns -fno-tracer -fno-ipa-ra"
+set additional_flags "-fno-tree-dse -fno-tree-loop-distribute-patterns -fno-tracer -fno-ipa-ra -fno-inline-functions"
 if [istarget "powerpc-*-darwin*"] {
    lappend additional_flags "-Wl,-multiply_defined,suppress"
 }

gcc/testsuite/gcc.dg/ipa/inline-7.c

 /* Check that early inliner works out that a is empty of parameter 0.  */
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-einline-optimized -fopt-info-inline -fno-partial-inlining"  } */
+/* { dg-options "-O2 -fdump-tree-einline-optimized -fopt-info-inline -fno-partial-inlining -fno-inline-functions"  } */
 void t(void);
 int a (int b)
 {

gcc/testsuite/gcc.dg/optimize-bswapsi-5.c

 /* { dg-do compile } */
 /* { dg-require-effective-target bswap } */
-/* { dg-options "-O2 -fdump-tree-bswap" } */
+/* { dg-options "-O2 -fdump-tree-bswap -fno-inline-functions" } */
 /* { dg-additional-options "-march=z900" { target s390-*-* } } */
 
 struct L { unsigned int l[2]; };

gcc/testsuite/gcc.dg/tree-ssa/ssa-thread-12.c

 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-thread2-details -fdump-tree-thread3-details -fdump-tree-thread4-details -fno-finite-loops" } */
+/* { dg-options "-O2 -fdump-tree-thread2-details -fdump-tree-thread3-details -fdump-tree-thread4-details -fno-finite-loops --param early-inlining-insns-O2=14 -fno-inline-functions" } */
 /* { dg-final { scan-tree-dump "FSM" "thread2" } } */
 /* { dg-final { scan-tree-dump "FSM" "thread3" } } */
 /* { dg-final { scan-tree-dump "FSM" "thread4" { xfail *-*-* } } } */
@@ -56,7 +56,7 @@ bmp_iter_and_compl (bitmap_iterator * bi, unsigned *bit_no)
 }
 
 extern int VEC_int_base_length (VEC_int_base *);
-static __inline__ bitmap
+bitmap
 compute_idf (bitmap def_blocks, bitmap_head * dfs)
 {
   bitmap_iterator bi;

gcc/testsuite/gcc.dg/winline-3.c

 /* { dg-do compile } */
-/* { dg-options "-Winline -O2 --param max-inline-insns-single=1 --param inline-min-speedup=100 -fgnu89-inline" } */
+/* { dg-options "-Winline -O2 --param max-inline-insns-single-O2=1 --param inline-min-speedup-O2=100 -fgnu89-inline" } */
 
 void big (void);
 inline int q(void) /* { dg-warning "max-inline-insns-single" } */