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[209.132.180.131]) by mx.google.com with ESMTPS id hu6si3984602pad.196.2016.05.31.06.09.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 31 May 2016 06:09:20 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-return-428661-patch=linaro.org@gcc.gnu.org designates 209.132.180.131 as permitted sender) client-ip=209.132.180.131; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org; spf=pass (google.com: domain of gcc-patches-return-428661-patch=linaro.org@gcc.gnu.org designates 209.132.180.131 as permitted sender) smtp.mailfrom=gcc-patches-return-428661-patch=linaro.org@gcc.gnu.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org DomainKey-Signature: a=rsa-sha1; c=nofws; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender :mime-version:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; q=dns; s=default; b=N+F49Wka8mSGVAEkk5 9rLAZRVHJs2duZj1Jp1BcwW9nvkWoknJ/gmIPkoUgFtHtN+BKEdr71xYqknOXCR1 hdJlU+d9gNHfuxt0hsoTxRNG0ZRVLSIWI/+UML9k4TvGUIyrr4JkgIkB7RpEfMBL u9bB2fmWxSBx0IVJJwq5TWspk= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=gcc.gnu.org; h=list-id :list-unsubscribe:list-archive:list-post:list-help:sender :mime-version:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; s=default; bh=wV+4QuagC6pHkNQFdC1pE0Fy Mws=; b=HHO5Gr9PitfnugGtHjj+wAxt44gdVmkf8dOxxyIIW+IOi/372ucPKzz6 SQmVs7u2GN12IGBELwtBV4ncdqWmvhSaDb7bVKg9M/tCt/3/f4gnkbWV2klzSWEF mNIh6dubsxV5x9QoxgWo6NCT1y/BNXTR929Izbl8EaCSsw54KtQ= Received: (qmail 44665 invoked by alias); 31 May 2016 13:09:07 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Delivered-To: mailing list gcc-patches@gcc.gnu.org Received: (qmail 44394 invoked by uid 89); 31 May 2016 13:09:06 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.1 required=5.0 tests=AWL, BAYES_00, RCVD_IN_DNSWL_LOW, SPF_PASS autolearn=ham version=3.3.2 spammy=*stmt, Hook, 1879, Kulkarni X-HELO: mail-it0-f45.google.com Received: from mail-it0-f45.google.com (HELO mail-it0-f45.google.com) (209.85.214.45) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Tue, 31 May 2016 13:08:54 +0000 Received: by mail-it0-f45.google.com with SMTP id z189so50974729itg.0 for ; Tue, 31 May 2016 06:08:54 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc; bh=m4dMXNd2MFmULAdnPlaJz4mKqvF837/I6UlmNM9NGRk=; b=OBo9FL7NiKn/ho4dhi9k2NoM2wwiPsXM84kTjGIWB4c1QVsL3BK20d/G87nhRAHC79 bvCronmdZ6M5lXShvlZnqa4WUhaXuw+OG5e+HeZnmWIo8U0tuCxQgJDPD2rJR3vc2j2I kDrOuVDTMWylgkZVBNJ7XVK3RZJ21xtCS4UMdwk6vTaD33Mu1DaQvOg+e7hN5uhAwCQb Ud3uNAO0WyElUIfvtFsiY6m/xAG7TqkYR6Ssl8dPyTyW7CeKwWiA57BWtFj65kIS67h+ +b2cc6cc5ZcUAj563po91YQEIciJE+e+xIAsAwHiFUv2RlL0i++MbUddh6rIUBO1k0Bd iuoA== X-Gm-Message-State: ALyK8tJKMcjCr/8vGVAfod0KSdebGqRDwOVVhxklRKBF4vb2TFpAzxZ5PM0LJBcuLEhUb/pehTfn06fCd18tm/3D MIME-Version: 1.0 X-Received: by 10.36.89.4 with SMTP id p4mr12293393itb.44.1464700132683; Tue, 31 May 2016 06:08:52 -0700 (PDT) Received: by 10.36.236.5 with HTTP; Tue, 31 May 2016 06:08:52 -0700 (PDT) In-Reply-To: References: Date: Tue, 31 May 2016 18:38:52 +0530 Message-ID: Subject: Re: RFC [1/2] divmod transform From: Prathamesh Kulkarni To: Richard Biener Cc: Richard Biener , gcc Patches , Ramana Radhakrishnan , Kugan Vivekanandarajah , Jim Wilson , "Joseph S. Myers" X-IsSubscribed: yes On 30 May 2016 at 13:15, Richard Biener wrote: > On Mon, 30 May 2016, Prathamesh Kulkarni wrote: > >> The attached patch ICE's during bootstrap for x86_64, and is reproducible with >> following case with -m32 -O2: >> >> typedef long long type; >> >> type f(type x, type y) >> { >> type q = x / y; >> type r = x % y; >> return q + r; >> } >> >> The ICE happens because the test-case hits >> gcc_assert (unsignedp); >> in default_expand_divmod_libfunc (). > > That's of course your function (and ICE). > >> Surprisingly, optab_libfunc (sdivmod_optab, DImode) returns optab_libfunc >> with name "__divmoddi4" although __divmoddi4() is nowhere defined in >> libgcc for x86. >> (I verified that by forcing the patch to generate call to __divmoddi4, >> which results in undefined reference to __divmoddi4). >> >> This happens because in optabs.def we have: >> OPTAB_NL(sdivmod_optab, "divmod$a4", UNKNOWN, "divmod", '4', gen_int_libfunc) >> >> and gen_int_libfunc generates "__divmoddi4" on first call to optab_libfunc >> and sets optab_libfunc (sdivmod_optab, DImode) to "__divmoddi4". >> I wonder if we should remove gen_int_libfunc entry in optabs.def for >> sdivmod_optab ? > > Hum, not sure - you might want to look at expand_divmod (though that > always just computes one part of the result in the end). As a workaround, would it be OK to check if libfunc is __udivmoddi4 if expand_divmod_libfunc is default, as in attached patch ? This prevents ICE for the above test-case. Bootstrap+test on x86_64 in progress. Thanks, Prathamesh > > Joseph - do you know sth about why there's not a full set of divmod > libfuncs in libgcc? > > Thanks, > Richard. diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 8c7f2a1..111f19f 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -6963,6 +6963,12 @@ This is firstly introduced on ARM/AArch64 targets, please refer to the hook implementation for how different fusion types are supported. @end deftypefn +@deftypefn {Target Hook} void TARGET_EXPAND_DIVMOD_LIBFUNC (bool @var{unsignedp}, machine_mode @var{mode}, @var{rtx}, @var{rtx}, rtx *@var{quot}, rtx *@var{rem}) +Define this hook if the port does not have hardware div and divmod insn for +the given mode but has divmod libfunc, which is incompatible +with libgcc2.c:__udivmoddi4 +@end deftypefn + @node Sections @section Dividing the Output into Sections (Texts, Data, @dots{}) @c the above section title is WAY too long. maybe cut the part between diff --git a/gcc/doc/tm.texi.in b/gcc/doc/tm.texi.in index f963a58..2c9a800 100644 --- a/gcc/doc/tm.texi.in +++ b/gcc/doc/tm.texi.in @@ -4848,6 +4848,8 @@ them: try the first ones in this list first. @hook TARGET_SCHED_FUSION_PRIORITY +@hook TARGET_EXPAND_DIVMOD_LIBFUNC + @node Sections @section Dividing the Output into Sections (Texts, Data, @dots{}) @c the above section title is WAY too long. maybe cut the part between diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c index c867ddc..0cb59f7 100644 --- a/gcc/internal-fn.c +++ b/gcc/internal-fn.c @@ -2276,6 +2276,48 @@ multi_vector_optab_supported_p (convert_optab optab, tree_pair types, #define direct_mask_store_optab_supported_p direct_optab_supported_p #define direct_store_lanes_optab_supported_p multi_vector_optab_supported_p +/* Expand DIVMOD() using: + a) optab handler for udivmod/sdivmod if it is available. + b) If optab_handler doesn't exist, Generate call to + optab_libfunc for udivmod/sdivmod. */ + +static void +expand_DIVMOD (internal_fn, gcall *stmt) +{ + tree lhs = gimple_call_lhs (stmt); + tree arg0 = gimple_call_arg (stmt, 0); + tree arg1 = gimple_call_arg (stmt, 1); + + gcc_assert (TREE_CODE (TREE_TYPE (lhs)) == COMPLEX_TYPE); + tree type = TREE_TYPE (TREE_TYPE (lhs)); + machine_mode mode = TYPE_MODE (type); + bool unsignedp = TYPE_UNSIGNED (type); + optab tab = (unsignedp) ? udivmod_optab : sdivmod_optab; + + rtx op0 = expand_normal (arg0); + rtx op1 = expand_normal (arg1); + rtx target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE); + + rtx quotient, remainder; + + /* Check if optab handler exists for [u]divmod. */ + if (optab_handler (tab, mode) != CODE_FOR_nothing) + { + quotient = gen_reg_rtx (mode); + remainder = gen_reg_rtx (mode); + expand_twoval_binop (tab, op0, op1, quotient, remainder, unsignedp); + } + else + targetm.expand_divmod_libfunc (unsignedp, mode, op0, op1, + "ient, &remainder); + + /* Wrap the return value (quotient, remainder) within COMPLEX_EXPR. */ + expand_expr (build2 (COMPLEX_EXPR, TREE_TYPE (lhs), + make_tree (TREE_TYPE (arg0), quotient), + make_tree (TREE_TYPE (arg1), remainder)), + target, VOIDmode, EXPAND_NORMAL); +} + /* Return true if FN is supported for the types in TYPES when the optimization type is OPT_TYPE. The types are those associated with the "type0" and "type1" fields of FN's direct_internal_fn_info diff --git a/gcc/internal-fn.def b/gcc/internal-fn.def index e729d85..56a80f1 100644 --- a/gcc/internal-fn.def +++ b/gcc/internal-fn.def @@ -194,6 +194,9 @@ DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_SET, ECF_LEAF | ECF_NOTHROW, NULL) DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_COMPLEMENT, ECF_LEAF | ECF_NOTHROW, NULL) DEF_INTERNAL_FN (ATOMIC_BIT_TEST_AND_RESET, ECF_LEAF | ECF_NOTHROW, NULL) +/* Divmod function. */ +DEF_INTERNAL_FN (DIVMOD, ECF_CONST | ECF_LEAF, NULL) + #undef DEF_INTERNAL_INT_FN #undef DEF_INTERNAL_FLT_FN #undef DEF_INTERNAL_OPTAB_FN diff --git a/gcc/target.def b/gcc/target.def index 6392e73..4496f9a 100644 --- a/gcc/target.def +++ b/gcc/target.def @@ -4948,6 +4948,16 @@ Normally, this is not needed.", bool, (const_tree field, machine_mode mode), default_member_type_forces_blk) +/* See tree-ssa-math-opts.c:divmod_candidate_p for conditions that gate + the divmod transform. */ +DEFHOOK +(expand_divmod_libfunc, + "Define this hook if the port does not have hardware div and divmod insn for\n\ +the given mode but has divmod libfunc, which is incompatible\n\ +with libgcc2.c:__udivmoddi4", + void, (bool unsignedp, machine_mode mode, rtx, rtx, rtx *quot, rtx *rem), + default_expand_divmod_libfunc) + /* Return the class for a secondary reload, and fill in extra information. */ DEFHOOK (secondary_reload, diff --git a/gcc/targhooks.c b/gcc/targhooks.c index 6b4601b..20327a6 100644 --- a/gcc/targhooks.c +++ b/gcc/targhooks.c @@ -1965,4 +1965,31 @@ default_optab_supported_p (int, machine_mode, machine_mode, optimization_type) return true; } +/* Generate call to + DImode __udivmoddi4 (DImode op0, DImode op1, DImode *rem). */ + +void +default_expand_divmod_libfunc (bool unsignedp, machine_mode mode, + rtx op0, rtx op1, + rtx *quot_p, rtx *rem_p) +{ + gcc_assert (mode == DImode); + gcc_assert (unsignedp); + + rtx libfunc = optab_libfunc (udivmod_optab, DImode); + gcc_assert (libfunc); + + rtx remainder = assign_stack_temp (DImode, GET_MODE_SIZE (DImode)); + rtx address = XEXP (remainder, 0); + + rtx quotient = emit_library_call_value (libfunc, NULL_RTX, LCT_CONST, + DImode, 3, + op0, GET_MODE (op0), + op1, GET_MODE (op1), + address, GET_MODE (address)); + + *quot_p = quotient; + *rem_p = remainder; +} + #include "gt-targhooks.h" diff --git a/gcc/targhooks.h b/gcc/targhooks.h index 7687c39..dc5e8e7 100644 --- a/gcc/targhooks.h +++ b/gcc/targhooks.h @@ -254,4 +254,7 @@ extern void default_setup_incoming_vararg_bounds (cumulative_args_t ca ATTRIBUTE extern bool default_optab_supported_p (int, machine_mode, machine_mode, optimization_type); +extern void default_expand_divmod_libfunc (bool, machine_mode, + rtx, rtx, rtx *, rtx *); + #endif /* GCC_TARGHOOKS_H */ diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index 81688cd..9bde79f 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -112,6 +112,9 @@ along with GCC; see the file COPYING3. If not see #include "params.h" #include "internal-fn.h" #include "case-cfn-macros.h" +#include "optabs-libfuncs.h" +#include "tree-eh.h" +#include "targhooks.h" /* This structure represents one basic block that either computes a division, or is a common dominator for basic block that compute a @@ -184,6 +187,9 @@ static struct /* Number of fp fused multiply-add ops inserted. */ int fmas_inserted; + + /* Number of divmod calls inserted. */ + int divmod_calls_inserted; } widen_mul_stats; /* The instance of "struct occurrence" representing the highest @@ -3784,6 +3790,228 @@ match_uaddsub_overflow (gimple_stmt_iterator *gsi, gimple *stmt, return true; } +/* Return true if target has support for divmod. */ + +static bool +target_supports_divmod_p (optab divmod_optab, optab div_optab, machine_mode mode) +{ + /* If target supports hardware divmod insn, use it for divmod. */ + if (optab_handler (divmod_optab, mode) != CODE_FOR_nothing) + return true; + + /* Check if libfunc for divmod is available. */ + rtx libfunc = optab_libfunc (divmod_optab, mode); + if (libfunc != NULL_RTX) + { + /* If optab_handler exists for div_optab, perhaps in a wider mode, + we don't want to use the libfunc even if it exists for given mode. */ + for (machine_mode div_mode = mode; + div_mode != VOIDmode; + div_mode = GET_MODE_WIDER_MODE (div_mode)) + if (optab_handler (div_optab, div_mode) != CODE_FOR_nothing) + return false; + + /* FIXME: This is a hack to workaround an issue with optab_libfunc(). + optab_libfunc (sdivmod_optab, DImode) returns libfunc "__divmoddi4", + although __divmoddi4() does not exist in libgcc. For now, enable the + transform only if libfunc is guaranteed to be __udivmoddi4. */ + return (targetm.expand_divmod_libfunc != default_expand_divmod_libfunc + || !strcmp (XSTR (libfunc, 0), "__udivmoddi4")); + } + + return false; +} + +/* Check if stmt is candidate for divmod transform. */ + +static bool +divmod_candidate_p (gassign *stmt) +{ + tree type = TREE_TYPE (gimple_assign_lhs (stmt)); + enum machine_mode mode = TYPE_MODE (type); + optab divmod_optab, div_optab; + + if (TYPE_UNSIGNED (type)) + { + divmod_optab = udivmod_optab; + div_optab = udiv_optab; + } + else + { + divmod_optab = sdivmod_optab; + div_optab = sdiv_optab; + } + + tree op1 = gimple_assign_rhs1 (stmt); + tree op2 = gimple_assign_rhs2 (stmt); + + /* Disable the transform if either is a constant, since division-by-constant + may have specialized expansion. */ + if (CONSTANT_CLASS_P (op1) || CONSTANT_CLASS_P (op2)) + return false; + + /* Exclude the case where TYPE_OVERFLOW_TRAPS (type) as that should + expand using the [su]divv optabs. */ + if (TYPE_OVERFLOW_TRAPS (type)) + return false; + + if (!target_supports_divmod_p (divmod_optab, div_optab, mode)) + return false; + + return true; +} + +/* This function looks for: + t1 = a TRUNC_DIV_EXPR b; + t2 = a TRUNC_MOD_EXPR b; + and transforms it to the following sequence: + complex_tmp = DIVMOD (a, b); + t1 = REALPART_EXPR(a); + t2 = IMAGPART_EXPR(b); + For conditions enabling the transform see divmod_candidate_p(). + + The pass works in two phases: + 1) Walk through all immediate uses of stmt's operand and find a + TRUNC_DIV_EXPR with matching operands and if such a stmt is found add + it to stmts vector. + 2) Insert DIVMOD call before first div/mod stmt in top_bb (basic block that + dominates other div/mod stmts with same operands) and update entries in + stmts vector to use return value of DIMOVD (REALEXPR_PART for div, + IMAGPART_EXPR for mod). */ + +static bool +convert_to_divmod (gassign *stmt) +{ + if (!divmod_candidate_p (stmt)) + return false; + + tree op1 = gimple_assign_rhs1 (stmt); + tree op2 = gimple_assign_rhs2 (stmt); + + imm_use_iterator use_iter; + gimple *use_stmt; + auto_vec stmts; + + gimple *top_stmt = stmt; + basic_block top_bb = gimple_bb (stmt); + + /* Try to set top_stmt to "topmost" stmt + with code TRUNC_DIV_EXPR/TRUNC_MOD_EXPR having same operands as stmt. */ + + FOR_EACH_IMM_USE_STMT (use_stmt, use_iter, op1) + { + if (is_gimple_assign (use_stmt) + && (gimple_assign_rhs_code (use_stmt) == TRUNC_DIV_EXPR + || gimple_assign_rhs_code (use_stmt) == TRUNC_MOD_EXPR) + && operand_equal_p (op1, gimple_assign_rhs1 (use_stmt), 0) + && operand_equal_p (op2, gimple_assign_rhs2 (use_stmt), 0)) + { + if (stmt_can_throw_internal (use_stmt)) + continue; + + basic_block bb = gimple_bb (use_stmt); + + if (bb == top_bb) + { + if (gimple_uid (use_stmt) < gimple_uid (top_stmt)) + top_stmt = use_stmt; + } + else if (dominated_by_p (CDI_DOMINATORS, top_bb, bb)) + { + top_bb = bb; + top_stmt = use_stmt; + } + } + } + + if (top_stmt == stmt && stmt_can_throw_internal (top_stmt)) + return false; + + tree top_op1 = gimple_assign_rhs1 (top_stmt); + tree top_op2 = gimple_assign_rhs2 (top_stmt); + + stmts.safe_push (top_stmt); + bool div_seen = (gimple_assign_rhs_code (top_stmt) == TRUNC_DIV_EXPR); + + /* Ensure that gimple_bb (use_stmt) is dominated by top_bb. */ + + FOR_EACH_IMM_USE_STMT (use_stmt, use_iter, top_op1) + { + if (is_gimple_assign (use_stmt) + && (gimple_assign_rhs_code (use_stmt) == TRUNC_DIV_EXPR + || gimple_assign_rhs_code (use_stmt) == TRUNC_MOD_EXPR) + && operand_equal_p (top_op1, gimple_assign_rhs1 (use_stmt), 0) + && operand_equal_p (top_op2, gimple_assign_rhs2 (use_stmt), 0)) + { + if (use_stmt == top_stmt) + continue; + + if (stmt_can_throw_internal (use_stmt)) + continue; + + if (!dominated_by_p (CDI_DOMINATORS, gimple_bb (use_stmt), top_bb)) + { + end_imm_use_stmt_traverse (&use_iter); + return false; + } + + stmts.safe_push (use_stmt); + if (gimple_assign_rhs_code (use_stmt) == TRUNC_DIV_EXPR) + div_seen = true; + } + } + + if (!div_seen) + return false; + + /* Create libcall to internal fn DIVMOD: + divmod_tmp = DIVMOD (op1, op2). */ + + gcall *call_stmt = gimple_build_call_internal (IFN_DIVMOD, 2, op1, op2); + tree res = make_temp_ssa_name ( + build_complex_type (TREE_TYPE (op1)), + call_stmt, "divmod_tmp"); + gimple_call_set_lhs (call_stmt, res); + + /* Insert the call before top_stmt. */ + gimple_stmt_iterator top_stmt_gsi = gsi_for_stmt (top_stmt); + gsi_insert_before (&top_stmt_gsi, call_stmt, GSI_SAME_STMT); + + widen_mul_stats.divmod_calls_inserted++; + + /* Update all statements in stmts. + if stmt is lhs = op1 TRUNC_DIV_EXPR op2, change to lhs = REALPART_EXPR + if stmt is lhs = op1 TRUNC_MOD_EXPR op2, change to lhs = IMAGPART_EXPR. */ + + bool cfg_changed = false; + for (unsigned i = 0; stmts.iterate (i, &use_stmt); ++i) + { + tree new_rhs; + + switch (gimple_assign_rhs_code (use_stmt)) + { + case TRUNC_DIV_EXPR: + new_rhs = fold_build1 (REALPART_EXPR, TREE_TYPE (op1), res); + break; + + case TRUNC_MOD_EXPR: + new_rhs = fold_build1 (IMAGPART_EXPR, TREE_TYPE (op2), res); + break; + + default: + gcc_unreachable (); + } + + gimple_stmt_iterator gsi = gsi_for_stmt (use_stmt); + gimple_assign_set_rhs_from_tree (&gsi, new_rhs); + update_stmt (use_stmt); + + if (maybe_clean_or_replace_eh_stmt (use_stmt, use_stmt)) + cfg_changed = true; + } + + return cfg_changed; +} /* Find integer multiplications where the operands are extended from smaller types, and replace the MULT_EXPR with a WIDEN_MULT_EXPR @@ -3828,6 +4056,8 @@ pass_optimize_widening_mul::execute (function *fun) bool cfg_changed = false; memset (&widen_mul_stats, 0, sizeof (widen_mul_stats)); + calculate_dominance_info (CDI_DOMINATORS); + renumber_gimple_stmt_uids (); FOR_EACH_BB_FN (bb, fun) { @@ -3861,6 +4091,10 @@ pass_optimize_widening_mul::execute (function *fun) match_uaddsub_overflow (&gsi, stmt, code); break; + case TRUNC_MOD_EXPR: + cfg_changed = convert_to_divmod (as_a (stmt)); + break; + default:; } } @@ -3907,6 +4141,8 @@ pass_optimize_widening_mul::execute (function *fun) widen_mul_stats.maccs_inserted); statistics_counter_event (fun, "fused multiply-adds inserted", widen_mul_stats.fmas_inserted); + statistics_counter_event (fun, "divmod calls inserted", + widen_mul_stats.divmod_calls_inserted); return cfg_changed ? TODO_cleanup_cfg : 0; }