Short-cut generation of simple built-in functions
This patch short-circuits the builtins.c expansion code for a particular gimple call if: - the function has an associated internal function - the target implements that internal function - the call has no side effects This allows a later patch to remove the builtins.c code, once calls with side effects have been handled. Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi. gcc/ * builtins.h (called_as_built_in): Declare. * builtins.c (called_as_built_in): Make external. * internal-fn.h (expand_internal_call): Define a variant that specifies the internal function explicitly. * internal-fn.c (expand_load_lanes_optab_fn) (expand_store_lanes_optab_fn, expand_ANNOTATE, expand_GOMP_SIMD_LANE) (expand_GOMP_SIMD_VF, expand_GOMP_SIMD_LAST_LANE) (expand_GOMP_SIMD_ORDERED_START, expand_GOMP_SIMD_ORDERED_END) (expand_UBSAN_NULL, expand_UBSAN_BOUNDS, expand_UBSAN_VPTR) (expand_UBSAN_OBJECT_SIZE, expand_ASAN_CHECK, expand_TSAN_FUNC_EXIT) (expand_UBSAN_CHECK_ADD, expand_UBSAN_CHECK_SUB) (expand_UBSAN_CHECK_MUL, expand_ADD_OVERFLOW, expand_SUB_OVERFLOW) (expand_MUL_OVERFLOW, expand_LOOP_VECTORIZED) (expand_mask_load_optab_fn, expand_mask_store_optab_fn) (expand_ABNORMAL_DISPATCHER, expand_BUILTIN_EXPECT, expand_VA_ARG) (expand_UNIQUE, expand_GOACC_DIM_SIZE, expand_GOACC_DIM_POS) (expand_GOACC_LOOP, expand_GOACC_REDUCTION, expand_direct_optab_fn) (expand_unary_optab_fn, expand_binary_optab_fn): Add an internal_fn argument. (internal_fn_expanders): Update prototype. (expand_internal_call): Define a variant that specifies the internal function explicitly. Use it to implement the previous interface. * cfgexpand.c (expand_call_stmt): Try to expand calls to built-in functions as calls to internal functions. From-SVN: r230487
This commit is contained in:
Richard Sandiford
Richard Sandiford
parent
b1dc4a20a7
commit
4cfe7a6c35
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@ -1,3 +1,31 @@
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2015-11-17 Richard Sandiford <richard.sandiford@arm.com>
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* builtins.h (called_as_built_in): Declare.
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* builtins.c (called_as_built_in): Make external.
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* internal-fn.h (expand_internal_call): Define a variant that
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specifies the internal function explicitly.
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* internal-fn.c (expand_load_lanes_optab_fn)
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(expand_store_lanes_optab_fn, expand_ANNOTATE, expand_GOMP_SIMD_LANE)
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(expand_GOMP_SIMD_VF, expand_GOMP_SIMD_LAST_LANE)
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(expand_GOMP_SIMD_ORDERED_START, expand_GOMP_SIMD_ORDERED_END)
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(expand_UBSAN_NULL, expand_UBSAN_BOUNDS, expand_UBSAN_VPTR)
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(expand_UBSAN_OBJECT_SIZE, expand_ASAN_CHECK, expand_TSAN_FUNC_EXIT)
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(expand_UBSAN_CHECK_ADD, expand_UBSAN_CHECK_SUB)
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(expand_UBSAN_CHECK_MUL, expand_ADD_OVERFLOW, expand_SUB_OVERFLOW)
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(expand_MUL_OVERFLOW, expand_LOOP_VECTORIZED)
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(expand_mask_load_optab_fn, expand_mask_store_optab_fn)
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(expand_ABNORMAL_DISPATCHER, expand_BUILTIN_EXPECT, expand_VA_ARG)
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(expand_UNIQUE, expand_GOACC_DIM_SIZE, expand_GOACC_DIM_POS)
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(expand_GOACC_LOOP, expand_GOACC_REDUCTION, expand_direct_optab_fn)
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(expand_unary_optab_fn, expand_binary_optab_fn): Add an internal_fn
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argument.
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(internal_fn_expanders): Update prototype.
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(expand_internal_call): Define a variant that specifies the
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internal function explicitly. Use it to implement the previous
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interface.
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* cfgexpand.c (expand_call_stmt): Try to expand calls to built-in
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functions as calls to internal functions.
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2015-11-17 Richard Sandiford <richard.sandiford@arm.com>
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* Makefile.in (MOSTLYCLEANFILES): Add cfn-operators.pd.
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@ -222,7 +222,7 @@ is_builtin_fn (tree decl)
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of the optimization level. This means whenever a function is invoked with
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its "internal" name, which normally contains the prefix "__builtin". */
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static bool
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bool
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called_as_built_in (tree node)
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{
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/* Note that we must use DECL_NAME, not DECL_ASSEMBLER_NAME_SET_P since
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@ -50,6 +50,7 @@ extern struct target_builtins *this_target_builtins;
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extern bool force_folding_builtin_constant_p;
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extern bool is_builtin_fn (tree);
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extern bool called_as_built_in (tree);
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extern bool get_object_alignment_1 (tree, unsigned int *,
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unsigned HOST_WIDE_INT *);
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extern unsigned int get_object_alignment (tree);
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@ -2551,10 +2551,25 @@ expand_call_stmt (gcall *stmt)
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return;
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}
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/* If this is a call to a built-in function and it has no effect other
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than setting the lhs, try to implement it using an internal function
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instead. */
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decl = gimple_call_fndecl (stmt);
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if (gimple_call_lhs (stmt)
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&& !gimple_has_side_effects (stmt)
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&& (optimize || (decl && called_as_built_in (decl))))
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{
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internal_fn ifn = replacement_internal_fn (stmt);
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if (ifn != IFN_LAST)
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{
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expand_internal_call (ifn, stmt);
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return;
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}
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}
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exp = build_vl_exp (CALL_EXPR, gimple_call_num_args (stmt) + 3);
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CALL_EXPR_FN (exp) = gimple_call_fn (stmt);
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decl = gimple_call_fndecl (stmt);
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builtin_p = decl && DECL_BUILT_IN (decl);
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/* If this is not a builtin function, the function type through which the
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@ -103,7 +103,7 @@ get_multi_vector_move (tree array_type, convert_optab optab)
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/* Expand LOAD_LANES call STMT using optab OPTAB. */
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static void
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expand_load_lanes_optab_fn (gcall *stmt, convert_optab optab)
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expand_load_lanes_optab_fn (internal_fn, gcall *stmt, convert_optab optab)
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{
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struct expand_operand ops[2];
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tree type, lhs, rhs;
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@ -127,7 +127,7 @@ expand_load_lanes_optab_fn (gcall *stmt, convert_optab optab)
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/* Expand STORE_LANES call STMT using optab OPTAB. */
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static void
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expand_store_lanes_optab_fn (gcall *stmt, convert_optab optab)
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expand_store_lanes_optab_fn (internal_fn, gcall *stmt, convert_optab optab)
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{
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struct expand_operand ops[2];
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tree type, lhs, rhs;
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@ -149,7 +149,7 @@ expand_store_lanes_optab_fn (gcall *stmt, convert_optab optab)
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}
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static void
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expand_ANNOTATE (gcall *)
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expand_ANNOTATE (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -157,7 +157,7 @@ expand_ANNOTATE (gcall *)
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/* This should get expanded in adjust_simduid_builtins. */
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static void
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expand_GOMP_SIMD_LANE (gcall *)
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expand_GOMP_SIMD_LANE (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -165,7 +165,7 @@ expand_GOMP_SIMD_LANE (gcall *)
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/* This should get expanded in adjust_simduid_builtins. */
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static void
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expand_GOMP_SIMD_VF (gcall *)
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expand_GOMP_SIMD_VF (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -173,7 +173,7 @@ expand_GOMP_SIMD_VF (gcall *)
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/* This should get expanded in adjust_simduid_builtins. */
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static void
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expand_GOMP_SIMD_LAST_LANE (gcall *)
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expand_GOMP_SIMD_LAST_LANE (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -181,7 +181,7 @@ expand_GOMP_SIMD_LAST_LANE (gcall *)
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/* This should get expanded in adjust_simduid_builtins. */
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static void
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expand_GOMP_SIMD_ORDERED_START (gcall *)
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expand_GOMP_SIMD_ORDERED_START (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -189,7 +189,7 @@ expand_GOMP_SIMD_ORDERED_START (gcall *)
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/* This should get expanded in adjust_simduid_builtins. */
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static void
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expand_GOMP_SIMD_ORDERED_END (gcall *)
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expand_GOMP_SIMD_ORDERED_END (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -197,7 +197,7 @@ expand_GOMP_SIMD_ORDERED_END (gcall *)
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/* This should get expanded in the sanopt pass. */
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static void
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expand_UBSAN_NULL (gcall *)
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expand_UBSAN_NULL (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -205,7 +205,7 @@ expand_UBSAN_NULL (gcall *)
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/* This should get expanded in the sanopt pass. */
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static void
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expand_UBSAN_BOUNDS (gcall *)
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expand_UBSAN_BOUNDS (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -213,7 +213,7 @@ expand_UBSAN_BOUNDS (gcall *)
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/* This should get expanded in the sanopt pass. */
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static void
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expand_UBSAN_VPTR (gcall *)
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expand_UBSAN_VPTR (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -221,7 +221,7 @@ expand_UBSAN_VPTR (gcall *)
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/* This should get expanded in the sanopt pass. */
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static void
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expand_UBSAN_OBJECT_SIZE (gcall *)
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expand_UBSAN_OBJECT_SIZE (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -229,7 +229,7 @@ expand_UBSAN_OBJECT_SIZE (gcall *)
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/* This should get expanded in the sanopt pass. */
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static void
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expand_ASAN_CHECK (gcall *)
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expand_ASAN_CHECK (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -237,7 +237,7 @@ expand_ASAN_CHECK (gcall *)
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/* This should get expanded in the tsan pass. */
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static void
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expand_TSAN_FUNC_EXIT (gcall *)
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expand_TSAN_FUNC_EXIT (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -1639,7 +1639,7 @@ expand_mul_overflow (location_t loc, tree lhs, tree arg0, tree arg1,
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/* Expand UBSAN_CHECK_ADD call STMT. */
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static void
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expand_UBSAN_CHECK_ADD (gcall *stmt)
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expand_UBSAN_CHECK_ADD (internal_fn, gcall *stmt)
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{
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location_t loc = gimple_location (stmt);
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tree lhs = gimple_call_lhs (stmt);
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@ -1652,7 +1652,7 @@ expand_UBSAN_CHECK_ADD (gcall *stmt)
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/* Expand UBSAN_CHECK_SUB call STMT. */
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static void
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expand_UBSAN_CHECK_SUB (gcall *stmt)
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expand_UBSAN_CHECK_SUB (internal_fn, gcall *stmt)
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{
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location_t loc = gimple_location (stmt);
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tree lhs = gimple_call_lhs (stmt);
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@ -1668,7 +1668,7 @@ expand_UBSAN_CHECK_SUB (gcall *stmt)
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/* Expand UBSAN_CHECK_MUL call STMT. */
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static void
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expand_UBSAN_CHECK_MUL (gcall *stmt)
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expand_UBSAN_CHECK_MUL (internal_fn, gcall *stmt)
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{
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location_t loc = gimple_location (stmt);
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tree lhs = gimple_call_lhs (stmt);
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@ -1853,7 +1853,7 @@ expand_arith_overflow (enum tree_code code, gimple *stmt)
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/* Expand ADD_OVERFLOW STMT. */
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static void
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expand_ADD_OVERFLOW (gcall *stmt)
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expand_ADD_OVERFLOW (internal_fn, gcall *stmt)
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{
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expand_arith_overflow (PLUS_EXPR, stmt);
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}
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@ -1861,7 +1861,7 @@ expand_ADD_OVERFLOW (gcall *stmt)
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/* Expand SUB_OVERFLOW STMT. */
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static void
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expand_SUB_OVERFLOW (gcall *stmt)
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expand_SUB_OVERFLOW (internal_fn, gcall *stmt)
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{
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expand_arith_overflow (MINUS_EXPR, stmt);
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}
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@ -1869,7 +1869,7 @@ expand_SUB_OVERFLOW (gcall *stmt)
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/* Expand MUL_OVERFLOW STMT. */
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static void
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expand_MUL_OVERFLOW (gcall *stmt)
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expand_MUL_OVERFLOW (internal_fn, gcall *stmt)
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{
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expand_arith_overflow (MULT_EXPR, stmt);
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}
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@ -1877,7 +1877,7 @@ expand_MUL_OVERFLOW (gcall *stmt)
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/* This should get folded in tree-vectorizer.c. */
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static void
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expand_LOOP_VECTORIZED (gcall *)
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expand_LOOP_VECTORIZED (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -1885,7 +1885,7 @@ expand_LOOP_VECTORIZED (gcall *)
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/* Expand MASK_LOAD call STMT using optab OPTAB. */
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static void
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expand_mask_load_optab_fn (gcall *stmt, convert_optab optab)
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expand_mask_load_optab_fn (internal_fn, gcall *stmt, convert_optab optab)
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{
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struct expand_operand ops[3];
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tree type, lhs, rhs, maskt;
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@ -1914,7 +1914,7 @@ expand_mask_load_optab_fn (gcall *stmt, convert_optab optab)
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/* Expand MASK_STORE call STMT using optab OPTAB. */
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static void
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expand_mask_store_optab_fn (gcall *stmt, convert_optab optab)
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expand_mask_store_optab_fn (internal_fn, gcall *stmt, convert_optab optab)
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{
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struct expand_operand ops[3];
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tree type, lhs, rhs, maskt;
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@ -1939,12 +1939,12 @@ expand_mask_store_optab_fn (gcall *stmt, convert_optab optab)
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}
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static void
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expand_ABNORMAL_DISPATCHER (gcall *)
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expand_ABNORMAL_DISPATCHER (internal_fn, gcall *)
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{
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}
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static void
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expand_BUILTIN_EXPECT (gcall *stmt)
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expand_BUILTIN_EXPECT (internal_fn, gcall *stmt)
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{
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/* When guessing was done, the hints should be already stripped away. */
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gcc_assert (!flag_guess_branch_prob || optimize == 0 || seen_error ());
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@ -1964,7 +1964,7 @@ expand_BUILTIN_EXPECT (gcall *stmt)
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should never be called. */
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static void
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expand_VA_ARG (gcall *stmt ATTRIBUTE_UNUSED)
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expand_VA_ARG (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -1972,7 +1972,7 @@ expand_VA_ARG (gcall *stmt ATTRIBUTE_UNUSED)
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/* Expand the IFN_UNIQUE function according to its first argument. */
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static void
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expand_UNIQUE (gcall *stmt)
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expand_UNIQUE (internal_fn, gcall *stmt)
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{
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rtx pattern = NULL_RTX;
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enum ifn_unique_kind kind
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@ -2018,7 +2018,7 @@ expand_UNIQUE (gcall *stmt)
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/* The size of an OpenACC compute dimension. */
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static void
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expand_GOACC_DIM_SIZE (gcall *stmt)
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expand_GOACC_DIM_SIZE (internal_fn, gcall *stmt)
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{
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tree lhs = gimple_call_lhs (stmt);
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@ -2039,7 +2039,7 @@ expand_GOACC_DIM_SIZE (gcall *stmt)
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/* The position of an OpenACC execution engine along one compute axis. */
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static void
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expand_GOACC_DIM_POS (gcall *stmt)
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expand_GOACC_DIM_POS (internal_fn, gcall *stmt)
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{
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tree lhs = gimple_call_lhs (stmt);
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@ -2060,7 +2060,7 @@ expand_GOACC_DIM_POS (gcall *stmt)
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/* This is expanded by oacc_device_lower pass. */
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static void
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expand_GOACC_LOOP (gcall *stmt ATTRIBUTE_UNUSED)
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expand_GOACC_LOOP (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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@ -2068,20 +2068,20 @@ expand_GOACC_LOOP (gcall *stmt ATTRIBUTE_UNUSED)
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/* This is expanded by oacc_device_lower pass. */
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static void
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expand_GOACC_REDUCTION (gcall *stmt ATTRIBUTE_UNUSED)
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expand_GOACC_REDUCTION (internal_fn, gcall *)
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{
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gcc_unreachable ();
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}
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/* Expand call STMT using OPTAB, which has a single output operand and
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NARGS input operands. */
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/* Expand a call to FN using the operands in STMT. FN has a single
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output operand and NARGS input operands. */
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static void
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expand_direct_optab_fn (gcall *stmt, direct_optab optab, unsigned int nargs)
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expand_direct_optab_fn (internal_fn fn, gcall *stmt, direct_optab optab,
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unsigned int nargs)
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{
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expand_operand *ops = XALLOCAVEC (expand_operand, nargs + 1);
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internal_fn fn = gimple_call_internal_fn (stmt);
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tree_pair types = direct_internal_fn_types (fn, stmt);
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insn_code icode = direct_optab_handler (optab, TYPE_MODE (types.first));
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@ -2119,11 +2119,11 @@ expand_direct_optab_fn (gcall *stmt, direct_optab optab, unsigned int nargs)
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/* Expanders for optabs that can use expand_direct_optab_fn. */
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#define expand_unary_optab_fn(STMT, OPTAB) \
|
||||
expand_direct_optab_fn (STMT, OPTAB, 1)
|
||||
#define expand_unary_optab_fn(FN, STMT, OPTAB) \
|
||||
expand_direct_optab_fn (FN, STMT, OPTAB, 1)
|
||||
|
||||
#define expand_binary_optab_fn(STMT, OPTAB) \
|
||||
expand_direct_optab_fn (STMT, OPTAB, 2)
|
||||
#define expand_binary_optab_fn(FN, STMT, OPTAB) \
|
||||
expand_direct_optab_fn (FN, STMT, OPTAB, 2)
|
||||
|
||||
/* RETURN_TYPE and ARGS are a return type and argument list that are
|
||||
in principle compatible with FN (which satisfies direct_internal_fn_p).
|
||||
|
|
@ -2219,9 +2219,9 @@ direct_internal_fn_supported_p (internal_fn fn, tree type)
|
|||
|
||||
#define DEF_INTERNAL_OPTAB_FN(CODE, FLAGS, OPTAB, TYPE) \
|
||||
static void \
|
||||
expand_##CODE (gcall *stmt) \
|
||||
expand_##CODE (internal_fn fn, gcall *stmt) \
|
||||
{ \
|
||||
expand_##TYPE##_optab_fn (stmt, OPTAB##_optab); \
|
||||
expand_##TYPE##_optab_fn (fn, stmt, OPTAB##_optab); \
|
||||
}
|
||||
#include "internal-fn.def"
|
||||
|
||||
|
|
@ -2231,16 +2231,24 @@ direct_internal_fn_supported_p (internal_fn fn, tree type)
|
|||
expand_<NAME> (gcall *stmt)
|
||||
|
||||
where STMT is the statement that performs the call. */
|
||||
static void (*const internal_fn_expanders[]) (gcall *) = {
|
||||
static void (*const internal_fn_expanders[]) (internal_fn, gcall *) = {
|
||||
#define DEF_INTERNAL_FN(CODE, FLAGS, FNSPEC) expand_##CODE,
|
||||
#include "internal-fn.def"
|
||||
0
|
||||
};
|
||||
|
||||
/* Expand STMT as though it were a call to internal function FN. */
|
||||
|
||||
void
|
||||
expand_internal_call (internal_fn fn, gcall *stmt)
|
||||
{
|
||||
internal_fn_expanders[fn] (fn, stmt);
|
||||
}
|
||||
|
||||
/* Expand STMT, which is a call to internal function FN. */
|
||||
|
||||
void
|
||||
expand_internal_call (gcall *stmt)
|
||||
{
|
||||
internal_fn_expanders[(int) gimple_call_internal_fn (stmt)] (stmt);
|
||||
expand_internal_call (gimple_call_internal_fn (stmt), stmt);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -162,5 +162,6 @@ extern bool direct_internal_fn_supported_p (internal_fn, tree_pair);
|
|||
extern bool direct_internal_fn_supported_p (internal_fn, tree);
|
||||
|
||||
extern void expand_internal_call (gcall *);
|
||||
extern void expand_internal_call (internal_fn, gcall *);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue