@@ -410,10 +410,10 @@ struct rtx_iv
rtx delta, mult;
/* The mode it is extended to. */
- machine_mode extend_mode;
+ scalar_int_mode extend_mode;
/* The mode the variable iterates in. */
- machine_mode mode;
+ scalar_int_mode mode;
/* Whether the first iteration needs to be handled specially. */
unsigned first_special : 1;
@@ -454,19 +454,19 @@ struct GTY(()) niter_desc
bool signed_p;
/* The mode in that niter_expr should be computed. */
- machine_mode mode;
+ scalar_int_mode mode;
/* The number of iterations of the loop. */
rtx niter_expr;
};
extern void iv_analysis_loop_init (struct loop *);
-extern bool iv_analyze (rtx_insn *, rtx, struct rtx_iv *);
+extern bool iv_analyze (rtx_insn *, scalar_int_mode, rtx, struct rtx_iv *);
extern bool iv_analyze_result (rtx_insn *, rtx, struct rtx_iv *);
-extern bool iv_analyze_expr (rtx_insn *, rtx, machine_mode,
+extern bool iv_analyze_expr (rtx_insn *, scalar_int_mode, rtx,
struct rtx_iv *);
extern rtx get_iv_value (struct rtx_iv *, rtx);
-extern bool biv_p (rtx_insn *, rtx);
+extern bool biv_p (rtx_insn *, scalar_int_mode, rtx);
extern void find_simple_exit (struct loop *, struct niter_desc *);
extern void iv_analysis_done (void);
@@ -35,16 +35,17 @@ along with GCC; see the file COPYING3. If not see
The available functions are:
- iv_analyze (insn, reg, iv): Stores the description of the induction variable
- corresponding to the use of register REG in INSN to IV. Returns true if
- REG is an induction variable in INSN. false otherwise.
- If use of REG is not found in INSN, following insns are scanned (so that
- we may call this function on insn returned by get_condition).
+ iv_analyze (insn, mode, reg, iv): Stores the description of the induction
+ variable corresponding to the use of register REG (of mode MODE) in INSN
+ to IV. Returns true if REG is an induction variable in INSN. false
+ otherwise. If use of REG is not found in INSN, following insns are
+ scanned (so that we may call this function on insn returned by
+ get_condition).
iv_analyze_result (insn, def, iv): Stores to IV the description of the iv
corresponding to DEF, which is a register defined in INSN.
- iv_analyze_expr (insn, rhs, mode, iv): Stores to IV the description of iv
+ iv_analyze_expr (insn, mode, expr, iv): Stores to IV the description of iv
corresponding to expression EXPR evaluated at INSN. All registers used bu
- EXPR must also be used in INSN.
+ EXPR must also be used in INSN. MODE is the mode of EXPR.
*/
#include "config.h"
@@ -133,7 +134,7 @@ biv_entry_hasher::equal (const biv_entry *b, const rtx_def *r)
static hash_table<biv_entry_hasher> *bivs;
-static bool iv_analyze_op (rtx_insn *, rtx, struct rtx_iv *);
+static bool iv_analyze_op (rtx_insn *, scalar_int_mode, rtx, struct rtx_iv *);
/* Return the RTX code corresponding to the IV extend code EXTEND. */
static inline enum rtx_code
@@ -383,11 +384,8 @@ iv_get_reaching_def (rtx_insn *insn, rtx reg, df_ref *def)
consistency with other iv manipulation functions that may fail). */
static bool
-iv_constant (struct rtx_iv *iv, rtx cst, machine_mode mode)
+iv_constant (struct rtx_iv *iv, scalar_int_mode mode, rtx cst)
{
- if (mode == VOIDmode)
- mode = GET_MODE (cst);
-
iv->mode = mode;
iv->base = cst;
iv->step = const0_rtx;
@@ -403,7 +401,7 @@ iv_constant (struct rtx_iv *iv, rtx cst, machine_mode mode)
/* Evaluates application of subreg to MODE on IV. */
static bool
-iv_subreg (struct rtx_iv *iv, machine_mode mode)
+iv_subreg (struct rtx_iv *iv, scalar_int_mode mode)
{
/* If iv is invariant, just calculate the new value. */
if (iv->step == const0_rtx
@@ -445,7 +443,7 @@ iv_subreg (struct rtx_iv *iv, machine_mode mode)
/* Evaluates application of EXTEND to MODE on IV. */
static bool
-iv_extend (struct rtx_iv *iv, enum iv_extend_code extend, machine_mode mode)
+iv_extend (struct rtx_iv *iv, enum iv_extend_code extend, scalar_int_mode mode)
{
/* If iv is invariant, just calculate the new value. */
if (iv->step == const0_rtx
@@ -508,7 +506,7 @@ iv_neg (struct rtx_iv *iv)
static bool
iv_add (struct rtx_iv *iv0, struct rtx_iv *iv1, enum rtx_code op)
{
- machine_mode mode;
+ scalar_int_mode mode;
rtx arg;
/* Extend the constant to extend_mode of the other operand if necessary. */
@@ -578,7 +576,7 @@ iv_add (struct rtx_iv *iv0, struct rtx_iv *iv1, enum rtx_code op)
static bool
iv_mult (struct rtx_iv *iv, rtx mby)
{
- machine_mode mode = iv->extend_mode;
+ scalar_int_mode mode = iv->extend_mode;
if (GET_MODE (mby) != VOIDmode
&& GET_MODE (mby) != mode)
@@ -603,7 +601,7 @@ iv_mult (struct rtx_iv *iv, rtx mby)
static bool
iv_shift (struct rtx_iv *iv, rtx mby)
{
- machine_mode mode = iv->extend_mode;
+ scalar_int_mode mode = iv->extend_mode;
if (GET_MODE (mby) != VOIDmode
&& GET_MODE (mby) != mode)
@@ -628,9 +626,9 @@ iv_shift (struct rtx_iv *iv, rtx mby)
at get_biv_step. */
static bool
-get_biv_step_1 (df_ref def, rtx reg,
- rtx *inner_step, machine_mode *inner_mode,
- enum iv_extend_code *extend, machine_mode outer_mode,
+get_biv_step_1 (df_ref def, scalar_int_mode outer_mode, rtx reg,
+ rtx *inner_step, scalar_int_mode *inner_mode,
+ enum iv_extend_code *extend,
rtx *outer_step)
{
rtx set, rhs, op0 = NULL_RTX, op1 = NULL_RTX;
@@ -732,8 +730,8 @@ get_biv_step_1 (df_ref def, rtx reg,
*inner_mode = outer_mode;
*outer_step = const0_rtx;
}
- else if (!get_biv_step_1 (next_def, reg,
- inner_step, inner_mode, extend, outer_mode,
+ else if (!get_biv_step_1 (next_def, outer_mode, reg,
+ inner_step, inner_mode, extend,
outer_step))
return false;
@@ -793,19 +791,17 @@ get_biv_step_1 (df_ref def, rtx reg,
LAST_DEF is the definition of REG that dominates loop latch. */
static bool
-get_biv_step (df_ref last_def, rtx reg, rtx *inner_step,
- machine_mode *inner_mode, enum iv_extend_code *extend,
- machine_mode *outer_mode, rtx *outer_step)
+get_biv_step (df_ref last_def, scalar_int_mode outer_mode, rtx reg,
+ rtx *inner_step, scalar_int_mode *inner_mode,
+ enum iv_extend_code *extend, rtx *outer_step)
{
- *outer_mode = GET_MODE (reg);
-
- if (!get_biv_step_1 (last_def, reg,
- inner_step, inner_mode, extend, *outer_mode,
+ if (!get_biv_step_1 (last_def, outer_mode, reg,
+ inner_step, inner_mode, extend,
outer_step))
return false;
- gcc_assert ((*inner_mode == *outer_mode) != (*extend != IV_UNKNOWN_EXTEND));
- gcc_assert (*inner_mode != *outer_mode || *outer_step == const0_rtx);
+ gcc_assert ((*inner_mode == outer_mode) != (*extend != IV_UNKNOWN_EXTEND));
+ gcc_assert (*inner_mode != outer_mode || *outer_step == const0_rtx);
return true;
}
@@ -850,13 +846,13 @@ record_biv (rtx def, struct rtx_iv *iv)
}
/* Determines whether DEF is a biv and if so, stores its description
- to *IV. */
+ to *IV. OUTER_MODE is the mode of DEF. */
static bool
-iv_analyze_biv (rtx def, struct rtx_iv *iv)
+iv_analyze_biv (scalar_int_mode outer_mode, rtx def, struct rtx_iv *iv)
{
rtx inner_step, outer_step;
- machine_mode inner_mode, outer_mode;
+ scalar_int_mode inner_mode;
enum iv_extend_code extend;
df_ref last_def;
@@ -872,7 +868,7 @@ iv_analyze_biv (rtx def, struct rtx_iv *iv)
if (!CONSTANT_P (def))
return false;
- return iv_constant (iv, def, VOIDmode);
+ return iv_constant (iv, outer_mode, def);
}
if (!latch_dominating_def (def, &last_def))
@@ -883,7 +879,7 @@ iv_analyze_biv (rtx def, struct rtx_iv *iv)
}
if (!last_def)
- return iv_constant (iv, def, VOIDmode);
+ return iv_constant (iv, outer_mode, def);
if (analyzed_for_bivness_p (def, iv))
{
@@ -892,8 +888,8 @@ iv_analyze_biv (rtx def, struct rtx_iv *iv)
return iv->base != NULL_RTX;
}
- if (!get_biv_step (last_def, def, &inner_step, &inner_mode, &extend,
- &outer_mode, &outer_step))
+ if (!get_biv_step (last_def, outer_mode, def, &inner_step, &inner_mode,
+ &extend, &outer_step))
{
iv->base = NULL_RTX;
goto end;
@@ -930,16 +926,15 @@ iv_analyze_biv (rtx def, struct rtx_iv *iv)
The mode of the induction variable is MODE. */
bool
-iv_analyze_expr (rtx_insn *insn, rtx rhs, machine_mode mode,
+iv_analyze_expr (rtx_insn *insn, scalar_int_mode mode, rtx rhs,
struct rtx_iv *iv)
{
rtx mby = NULL_RTX;
rtx op0 = NULL_RTX, op1 = NULL_RTX;
struct rtx_iv iv0, iv1;
enum rtx_code code = GET_CODE (rhs);
- machine_mode omode = mode;
+ scalar_int_mode omode = mode;
- iv->mode = VOIDmode;
iv->base = NULL_RTX;
iv->step = NULL_RTX;
@@ -948,18 +943,7 @@ iv_analyze_expr (rtx_insn *insn, rtx rhs, machine_mode mode,
if (CONSTANT_P (rhs)
|| REG_P (rhs)
|| code == SUBREG)
- {
- if (!iv_analyze_op (insn, rhs, iv))
- return false;
-
- if (iv->mode == VOIDmode)
- {
- iv->mode = mode;
- iv->extend_mode = mode;
- }
-
- return true;
- }
+ return iv_analyze_op (insn, mode, rhs, iv);
switch (code)
{
@@ -971,7 +955,9 @@ iv_analyze_expr (rtx_insn *insn, rtx rhs, machine_mode mode,
case ZERO_EXTEND:
case NEG:
op0 = XEXP (rhs, 0);
- omode = GET_MODE (op0);
+ /* We don't know how many bits there are in a sign-extended constant. */
+ if (!is_a <scalar_int_mode> (GET_MODE (op0), &omode))
+ return false;
break;
case PLUS:
@@ -1001,11 +987,11 @@ iv_analyze_expr (rtx_insn *insn, rtx rhs, machine_mode mode,
}
if (op0
- && !iv_analyze_expr (insn, op0, omode, &iv0))
+ && !iv_analyze_expr (insn, omode, op0, &iv0))
return false;
if (op1
- && !iv_analyze_expr (insn, op1, omode, &iv1))
+ && !iv_analyze_expr (insn, omode, op1, &iv1))
return false;
switch (code)
@@ -1075,11 +1061,11 @@ iv_analyze_def (df_ref def, struct rtx_iv *iv)
return iv->base != NULL_RTX;
}
- iv->mode = VOIDmode;
iv->base = NULL_RTX;
iv->step = NULL_RTX;
- if (!REG_P (reg))
+ scalar_int_mode mode;
+ if (!REG_P (reg) || !is_a <scalar_int_mode> (GET_MODE (reg), &mode))
return false;
set = single_set (insn);
@@ -1096,7 +1082,7 @@ iv_analyze_def (df_ref def, struct rtx_iv *iv)
else
rhs = SET_SRC (set);
- iv_analyze_expr (insn, rhs, GET_MODE (reg), iv);
+ iv_analyze_expr (insn, mode, rhs, iv);
record_iv (def, iv);
if (dump_file)
@@ -1112,10 +1098,11 @@ iv_analyze_def (df_ref def, struct rtx_iv *iv)
return iv->base != NULL_RTX;
}
-/* Analyzes operand OP of INSN and stores the result to *IV. */
+/* Analyzes operand OP of INSN and stores the result to *IV. MODE is the
+ mode of OP. */
static bool
-iv_analyze_op (rtx_insn *insn, rtx op, struct rtx_iv *iv)
+iv_analyze_op (rtx_insn *insn, scalar_int_mode mode, rtx op, struct rtx_iv *iv)
{
df_ref def = NULL;
enum iv_grd_result res;
@@ -1132,13 +1119,15 @@ iv_analyze_op (rtx_insn *insn, rtx op, struct rtx_iv *iv)
res = GRD_INVARIANT;
else if (GET_CODE (op) == SUBREG)
{
- if (!subreg_lowpart_p (op))
+ scalar_int_mode inner_mode;
+ if (!subreg_lowpart_p (op)
+ || !is_a <scalar_int_mode> (GET_MODE (SUBREG_REG (op)), &inner_mode))
return false;
- if (!iv_analyze_op (insn, SUBREG_REG (op), iv))
+ if (!iv_analyze_op (insn, inner_mode, SUBREG_REG (op), iv))
return false;
- return iv_subreg (iv, GET_MODE (op));
+ return iv_subreg (iv, mode);
}
else
{
@@ -1153,7 +1142,7 @@ iv_analyze_op (rtx_insn *insn, rtx op, struct rtx_iv *iv)
if (res == GRD_INVARIANT)
{
- iv_constant (iv, op, VOIDmode);
+ iv_constant (iv, mode, op);
if (dump_file)
{
@@ -1165,15 +1154,16 @@ iv_analyze_op (rtx_insn *insn, rtx op, struct rtx_iv *iv)
}
if (res == GRD_MAYBE_BIV)
- return iv_analyze_biv (op, iv);
+ return iv_analyze_biv (mode, op, iv);
return iv_analyze_def (def, iv);
}
-/* Analyzes value VAL at INSN and stores the result to *IV. */
+/* Analyzes value VAL at INSN and stores the result to *IV. MODE is the
+ mode of VAL. */
bool
-iv_analyze (rtx_insn *insn, rtx val, struct rtx_iv *iv)
+iv_analyze (rtx_insn *insn, scalar_int_mode mode, rtx val, struct rtx_iv *iv)
{
rtx reg;
@@ -1192,7 +1182,7 @@ iv_analyze (rtx_insn *insn, rtx val, struct rtx_iv *iv)
insn = NEXT_INSN (insn);
}
- return iv_analyze_op (insn, val, iv);
+ return iv_analyze_op (insn, mode, val, iv);
}
/* Analyzes definition of DEF in INSN and stores the result to IV. */
@@ -1210,11 +1200,13 @@ iv_analyze_result (rtx_insn *insn, rtx def, struct rtx_iv *iv)
}
/* Checks whether definition of register REG in INSN is a basic induction
- variable. IV analysis must have been initialized (via a call to
+ variable. MODE is the mode of REG.
+
+ IV analysis must have been initialized (via a call to
iv_analysis_loop_init) for this function to produce a result. */
bool
-biv_p (rtx_insn *insn, rtx reg)
+biv_p (rtx_insn *insn, scalar_int_mode mode, rtx reg)
{
struct rtx_iv iv;
df_ref def, last_def;
@@ -1229,7 +1221,7 @@ biv_p (rtx_insn *insn, rtx reg)
if (last_def != def)
return false;
- if (!iv_analyze_biv (reg, &iv))
+ if (!iv_analyze_biv (mode, reg, &iv))
return false;
return iv.step != const0_rtx;
@@ -2078,7 +2070,7 @@ simplify_using_initial_values (struct loop *loop, enum rtx_code op, rtx *expr)
is SIGNED_P to DESC. */
static void
-shorten_into_mode (struct rtx_iv *iv, machine_mode mode,
+shorten_into_mode (struct rtx_iv *iv, scalar_int_mode mode,
enum rtx_code cond, bool signed_p, struct niter_desc *desc)
{
rtx mmin, mmax, cond_over, cond_under;
@@ -2140,7 +2132,7 @@ static bool
canonicalize_iv_subregs (struct rtx_iv *iv0, struct rtx_iv *iv1,
enum rtx_code cond, struct niter_desc *desc)
{
- machine_mode comp_mode;
+ scalar_int_mode comp_mode;
bool signed_p;
/* If the ivs behave specially in the first iteration, or are
@@ -2318,7 +2310,8 @@ iv_number_of_iterations (struct loop *loop, rtx_insn *insn, rtx condition,
struct rtx_iv iv0, iv1;
rtx assumption, may_not_xform;
enum rtx_code cond;
- machine_mode mode, comp_mode;
+ machine_mode nonvoid_mode;
+ scalar_int_mode comp_mode;
rtx mmin, mmax, mode_mmin, mode_mmax;
uint64_t s, size, d, inv, max, up, down;
int64_t inc, step_val;
@@ -2343,28 +2336,24 @@ iv_number_of_iterations (struct loop *loop, rtx_insn *insn, rtx condition,
cond = GET_CODE (condition);
gcc_assert (COMPARISON_P (condition));
- mode = GET_MODE (XEXP (condition, 0));
- if (mode == VOIDmode)
- mode = GET_MODE (XEXP (condition, 1));
+ nonvoid_mode = GET_MODE (XEXP (condition, 0));
+ if (nonvoid_mode == VOIDmode)
+ nonvoid_mode = GET_MODE (XEXP (condition, 1));
/* The constant comparisons should be folded. */
- gcc_assert (mode != VOIDmode);
+ gcc_assert (nonvoid_mode != VOIDmode);
/* We only handle integers or pointers. */
- if (GET_MODE_CLASS (mode) != MODE_INT
- && GET_MODE_CLASS (mode) != MODE_PARTIAL_INT)
+ scalar_int_mode mode;
+ if (!is_a <scalar_int_mode> (nonvoid_mode, &mode))
goto fail;
op0 = XEXP (condition, 0);
- if (!iv_analyze (insn, op0, &iv0))
+ if (!iv_analyze (insn, mode, op0, &iv0))
goto fail;
- if (iv0.extend_mode == VOIDmode)
- iv0.mode = iv0.extend_mode = mode;
op1 = XEXP (condition, 1);
- if (!iv_analyze (insn, op1, &iv1))
+ if (!iv_analyze (insn, mode, op1, &iv1))
goto fail;
- if (iv1.extend_mode == VOIDmode)
- iv1.mode = iv1.extend_mode = mode;
if (GET_MODE_BITSIZE (iv0.extend_mode) > HOST_BITS_PER_WIDE_INT
|| GET_MODE_BITSIZE (iv1.extend_mode) > HOST_BITS_PER_WIDE_INT)
@@ -1505,6 +1505,7 @@ analyze_iv_to_split_insn (rtx_insn *insn)
rtx set, dest;
struct rtx_iv iv;
struct iv_to_split *ivts;
+ scalar_int_mode mode;
bool ok;
/* For now we just split the basic induction variables. Later this may be
@@ -1514,10 +1515,10 @@ analyze_iv_to_split_insn (rtx_insn *insn)
return NULL;
dest = SET_DEST (set);
- if (!REG_P (dest))
+ if (!REG_P (dest) || !is_a <scalar_int_mode> (GET_MODE (dest), &mode))
return NULL;
- if (!biv_p (insn, dest))
+ if (!biv_p (insn, mode, dest))
return NULL;
ok = iv_analyze_result (insn, dest, &iv);