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| author | Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> | 2016-10-28 19:05:12 +0000 |
|---|---|---|
| committer | Prathamesh Kulkarni <prathamesh3492@gcc.gnu.org> | 2016-10-28 19:05:12 +0000 |
| commit | e72531b9cb3c214731f0e0f64f53033d3efb80ca (patch) | |
| tree | 9837b3df122e46bd34e1497c40a603aa1033fab1 /gcc/internal-fn.c | |
| parent | 0dfeae289cc3c97f0f61d02c81df393e720badf9 (diff) | |
| download | gcc-e72531b9cb3c214731f0e0f64f53033d3efb80ca.zip gcc-e72531b9cb3c214731f0e0f64f53033d3efb80ca.tar.gz gcc-e72531b9cb3c214731f0e0f64f53033d3efb80ca.tar.bz2 | |
re PR tree-optimization/43721 (Failure to optimise (a/b) and (a%b) into single __aeabi_idivmod call)
2016-10-28 Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
Kugan Vivekanandarajah <kuganv@linaro.org>
Jim Wilson <jim.wilson@linaro.org>
PR tree-optimization/43721
* target.def: New hook expand_divmod_libfunc.
* doc/tm.texi.in: Add hook for TARGET_EXPAND_DIVMOD_LIBFUNC
* doc/tm.texi: Regenerate.
* internal-fn.def: Add new entry for DIVMOD ifn.
* internal-fn.c (expand_DIVMOD): New.
* tree-ssa-math-opts.c: Include optabs-libfuncs.h, tree-eh.h,
targhooks.h.
(widen_mul_stats): Add new field divmod_calls_inserted.
(target_supports_divmod_p): New.
(divmod_candidate_p): Likewise.
(convert_to_divmod): Likewise.
(pass_optimize_widening_mul::execute): Call
calculate_dominance_info(), renumber_gimple_stmt_uids() at
beginning of function. Call convert_to_divmod()
and record stats for divmod.
* config/arm/arm.c (arm_expand_divmod_libfunc): Override hook
TARGET_EXPAND_DIVMOD_LIBFUNC.
* doc/sourcebuild.texi: Add items for arm_divmod_simode, divmod,
divmod_simode.
testsuite/
* lib/target-supports.exp (check_effective_target_divmod): New.
(check_effective_target_divmod_simode): Likewise.
(check_effective_target_arm_divmod_simode): Likewise.
* gcc.dg/divmod-1-simode.c: New test.
* gcc.dg/divmod-1.c: Likewise.
* gcc.dg/divmod-2-simode.c: Likewise.
* gcc.dg/divmod-2.c: Likewise.
* gcc.dg/divmod-3-simode.c: Likewise.
* gcc.dg/divmod-3.c: Likewise.
* gcc.dg/divmod-4-simode.c: Likewise.
* gcc.dg/divmod-4.c: Likewise.
* gcc.dg/divmod-5.c: Likewise.
* gcc.dg/divmod-6-simode.c: Likewise.
* gcc.dg/divmod-6.c: Likewise.
* gcc.dg/divmod-7.c: Likewise.
Co-Authored-By: Jim Wilson <jim.wilson@linaro.org>
Co-Authored-By: Kugan Vivekanandarajah <kuganv@linaro.org>
From-SVN: r241660
Diffstat (limited to 'gcc/internal-fn.c')
| -rw-r--r-- | gcc/internal-fn.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/internal-fn.c b/gcc/internal-fn.c index 156ba31..1eeb15e 100644 --- a/gcc/internal-fn.c +++ b/gcc/internal-fn.c @@ -2232,6 +2232,53 @@ expand_LAUNDER (internal_fn, gcall *call) expand_assignment (lhs, gimple_call_arg (call, 0), false); } +/* Expand DIVMOD() using: + a) optab handler for udivmod/sdivmod if it is available. + b) If optab_handler doesn't exist, generate call to + target-specific divmod libfunc. */ + +static void +expand_DIVMOD (internal_fn, gcall *call_stmt) +{ + tree lhs = gimple_call_lhs (call_stmt); + tree arg0 = gimple_call_arg (call_stmt, 0); + tree arg1 = gimple_call_arg (call_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, libfunc; + + /* Check if optab_handler exists for divmod_optab for given mode. */ + 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); + } + + /* Generate call to divmod libfunc if it exists. */ + else if ((libfunc = optab_libfunc (tab, mode)) != NULL_RTX) + targetm.expand_divmod_libfunc (libfunc, mode, op0, op1, + "ient, &remainder); + + else + gcc_unreachable (); + + /* 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); +} + /* Expand a call to FN using the operands in STMT. FN has a single output operand and NARGS input operands. */ |