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re PR middle-end/36206 (ice for legal code with -O3)

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2008-05-20  Jan Sjodin  <jan.sjodin@amd.com>
	    Sebastian Pop  <sebastian.pop@amd.com>

	PR tree-optimization/36206
	* tree-scalar-evolution.c: Remove enum INSERT_SUPERLOOP_CHRECS,
	FOLD_CONVERSIONS.
	(instantiate_scev_1): Rename flags to fold_conversions.
	Do not check for INSERT_SUPERLOOP_CHRECS, keep SSA_NAMEs defined
	outeside instantiation_loop.
	* tree-chrec.h (evolution_function_is_affine_in_loop): New.
	(evolution_function_is_affine_or_constant_p): Removed.
	* tree-data-ref.c (dr_analyze_indices): Replace resolve_mixers with
	instantiate_scev.
	(analyze_siv_subscript): Pass in the loop nest number.
	Call evolution_function_is_affine_in_loop instead of 
	evolution_function_is_affine_p.
	(analyze_overlapping_iterations): Pass in the loop nest number.

	* tree-chrec.h (chrec_fold_op): New.
	* tree-data-ref.c (initialize_matrix_A): Traverse NOP_EXPR, PLUS_EXPR, and
	other trees.

	* testsuite/gfortran.dg/pr36206.f: New.


Co-Authored-By: Sebastian Pop <sebastian.pop@amd.com>

From-SVN: r135663
This commit is contained in:
Jan Sjodin 2008-05-20 16:05:09 +00:00 committed by Sebastian Pop
parent 498f1c824b
commit 5b78fc3ed4
6 changed files with 247 additions and 66 deletions
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26
gcc/ChangeLog
View File

@ -1,3 +1,29 @@
2008-05-20 Jan Sjodin <jan.sjodin@amd.com>
Sebastian Pop <sebastian.pop@amd.com>
PR tree-optimization/36206
* tree-scalar-evolution.c: Remove enum INSERT_SUPERLOOP_CHRECS,
FOLD_CONVERSIONS.
(instantiate_scev_1): Rename flags to fold_conversions.
Do not check for INSERT_SUPERLOOP_CHRECS, keep SSA_NAMEs defined
outeside instantiation_loop.
* tree-chrec.h (evolution_function_is_affine_in_loop): New.
(evolution_function_is_affine_or_constant_p): Removed.
* tree-data-ref.c (dr_analyze_indices): Replace resolve_mixers with
instantiate_scev.
(analyze_siv_subscript): Pass in the loop nest number.
Call evolution_function_is_affine_in_loop instead of
evolution_function_is_affine_p.
(analyze_overlapping_iterations): Pass in the loop nest number.
2008-05-20 Jan Sjodin <jan.sjodin@amd.com>
Sebastian Pop <sebastian.pop@amd.com>
PR tree-optimization/36206
* tree-chrec.h (chrec_fold_op): New.
* tree-data-ref.c (initialize_matrix_A): Traverse NOP_EXPR, PLUS_EXPR, and
other trees.
2008-05-20 Nathan Sidwell <nathan@codesourcery.com>
* c-incpath.c (INO_T_EQ): Do not define on non-inode systems.

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2008-05-20 Jan Sjodin <jan.sjodin@amd.com>
Sebastian Pop <sebastian.pop@amd.com>
PR tree-optimization/36206
* testsuite/gfortran.dg/pr36206.f: New.
2008-05-20 Arnaud Charlet <charlet@adacore.com>
* gnat.dg/testint.adb: New test.

95
gcc/testsuite/gfortran.dg/pr36206.f Normal file
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@ -0,0 +1,95 @@
! { dg-do compile }
! { dg-options "-O3" }
! PR fortran/36206
SUBROUTINE SSPR(UPLO,N,ALPHA,X,INCX,AP)
REAL ALPHA
INTEGER INCX,N
CHARACTER UPLO
REAL AP(*),X(*)
REAL ZERO
PARAMETER (ZERO=0.0E+0)
REAL TEMP
INTEGER I,INFO,IX,J,JX,K,KK,KX
LOGICAL LSAME
EXTERNAL LSAME
EXTERNAL XERBLA
INFO = 0
IF (.NOT.LSAME(UPLO,'U') .AND. .NOT.LSAME(UPLO,'L')) THEN
INFO = 1
ELSE IF (N.LT.0) THEN
INFO = 2
ELSE IF (INCX.EQ.0) THEN
INFO = 5
END IF
IF (INFO.NE.0) THEN
CALL XERBLA('SSPR ',INFO)
RETURN
END IF
IF ((N.EQ.0) .OR. (ALPHA.EQ.ZERO)) RETURN
IF (INCX.LE.0) THEN
KX = 1 - (N-1)*INCX
ELSE IF (INCX.NE.1) THEN
KX = 1
END IF
KK = 1
IF (LSAME(UPLO,'U')) THEN
IF (INCX.EQ.1) THEN
DO 20 J = 1,N
IF (X(J).NE.ZERO) THEN
TEMP = ALPHA*X(J)
K = KK
DO 10 I = 1,J
AP(K) = AP(K) + X(I)*TEMP
K = K + 1
10 CONTINUE
END IF
KK = KK + J
20 CONTINUE
ELSE
JX = KX
DO 40 J = 1,N
IF (X(JX).NE.ZERO) THEN
TEMP = ALPHA*X(JX)
IX = KX
DO 30 K = KK,KK + J - 1
AP(K) = AP(K) + X(IX)*TEMP
IX = IX + INCX
30 CONTINUE
END IF
JX = JX + INCX
KK = KK + J
40 CONTINUE
END IF
ELSE
IF (INCX.EQ.1) THEN
DO 60 J = 1,N
IF (X(J).NE.ZERO) THEN
TEMP = ALPHA*X(J)
K = KK
DO 50 I = J,N
AP(K) = AP(K) + X(I)*TEMP
K = K + 1
50 CONTINUE
END IF
KK = KK + N - J + 1
60 CONTINUE
ELSE
JX = KX
DO 80 J = 1,N
IF (X(JX).NE.ZERO) THEN
TEMP = ALPHA*X(JX)
IX = JX
DO 70 K = KK,KK + N - J
AP(K) = AP(K) + X(IX)*TEMP
IX = IX + INCX
70 CONTINUE
END IF
JX = JX + INCX
KK = KK + N - J + 1
80 CONTINUE
END IF
END IF
RETURN
END

59
gcc/tree-chrec.h
View File

@ -168,7 +168,29 @@ evolution_function_is_constant_p (const_tree chrec)
}
}
/* Determine whether the given tree is an affine evolution function or not. */
/* Determine whether CHREC is an affine evolution function in LOOPNUM. */
static inline bool
evolution_function_is_affine_in_loop (const_tree chrec, int loopnum)
{
if (chrec == NULL_TREE)
return false;
switch (TREE_CODE (chrec))
{
case POLYNOMIAL_CHREC:
if (evolution_function_is_invariant_p (CHREC_LEFT (chrec), loopnum)
&& evolution_function_is_invariant_p (CHREC_RIGHT (chrec), loopnum))
return true;
else
return false;
default:
return false;
}
}
/* Determine whether CHREC is an affine evolution function or not. */
static inline bool
evolution_function_is_affine_p (const_tree chrec)
@ -179,10 +201,8 @@ evolution_function_is_affine_p (const_tree chrec)
switch (TREE_CODE (chrec))
{
case POLYNOMIAL_CHREC:
if (evolution_function_is_invariant_p (CHREC_LEFT (chrec),
CHREC_VARIABLE (chrec))
&& evolution_function_is_invariant_p (CHREC_RIGHT (chrec),
CHREC_VARIABLE (chrec)))
if (evolution_function_is_invariant_p (CHREC_LEFT (chrec), CHREC_VARIABLE (chrec))
&& evolution_function_is_invariant_p (CHREC_RIGHT (chrec), CHREC_VARIABLE (chrec)))
return true;
else
return false;
@ -192,16 +212,6 @@ evolution_function_is_affine_p (const_tree chrec)
}
}
/* Determine whether the given tree is an affine or constant evolution
function. */
static inline bool
evolution_function_is_affine_or_constant_p (const_tree chrec)
{
return evolution_function_is_affine_p (chrec)
|| evolution_function_is_constant_p (chrec);
}
/* Determines whether EXPR does not contains chrec expressions. */
static inline bool
@ -221,5 +231,24 @@ chrec_type (const_tree chrec)
return TREE_TYPE (chrec);
}
static inline tree
chrec_fold_op (enum tree_code code, tree type, tree op0, tree op1)
{
switch (code)
{
case PLUS_EXPR:
return chrec_fold_plus (type, op0, op1);
case MINUS_EXPR:
return chrec_fold_minus (type, op0, op1);
case MULT_EXPR:
return chrec_fold_multiply (type, op0, op1);
default:
gcc_unreachable ();
}
}
#endif /* GCC_TREE_CHREC_H */

55
gcc/tree-data-ref.c
View File

@ -754,7 +754,7 @@ dr_analyze_indices (struct data_reference *dr, struct loop *nest)
{
op = TREE_OPERAND (aref, 0);
access_fn = analyze_scalar_evolution (loop, op);
access_fn = resolve_mixers (nest, access_fn);
access_fn = instantiate_scev (nest, loop, access_fn);
base = initial_condition (access_fn);
split_constant_offset (base, &base, &off);
access_fn = chrec_replace_initial_condition (access_fn,
@ -1849,16 +1849,42 @@ analyze_siv_subscript_cst_affine (tree chrec_a,
/* Helper recursive function for initializing the matrix A. Returns
the initial value of CHREC. */
static HOST_WIDE_INT
static tree
initialize_matrix_A (lambda_matrix A, tree chrec, unsigned index, int mult)
{
gcc_assert (chrec);
if (TREE_CODE (chrec) != POLYNOMIAL_CHREC)
return int_cst_value (chrec);
switch (TREE_CODE (chrec))
{
case POLYNOMIAL_CHREC:
gcc_assert (TREE_CODE (CHREC_RIGHT (chrec)) == INTEGER_CST);
A[index][0] = mult * int_cst_value (CHREC_RIGHT (chrec));
return initialize_matrix_A (A, CHREC_LEFT (chrec), index + 1, mult);
A[index][0] = mult * int_cst_value (CHREC_RIGHT (chrec));
return initialize_matrix_A (A, CHREC_LEFT (chrec), index + 1, mult);
case PLUS_EXPR:
case MULT_EXPR:
case MINUS_EXPR:
{
tree op0 = initialize_matrix_A (A, TREE_OPERAND (chrec, 0), index, mult);
tree op1 = initialize_matrix_A (A, TREE_OPERAND (chrec, 1), index, mult);
return chrec_fold_op (TREE_CODE (chrec), chrec_type (chrec), op0, op1);
}
case NOP_EXPR:
{
tree op = initialize_matrix_A (A, TREE_OPERAND (chrec, 0), index, mult);
return chrec_convert (chrec_type (chrec), op, NULL_TREE);
}
case INTEGER_CST:
return chrec;
default:
gcc_unreachable ();
return NULL_TREE;
}
}
#define FLOOR_DIV(x,y) ((x) / (y))
@ -2090,8 +2116,8 @@ analyze_subscript_affine_affine (tree chrec_a,
A = lambda_matrix_new (dim, 1);
S = lambda_matrix_new (dim, 1);
init_a = initialize_matrix_A (A, chrec_a, 0, 1);
init_b = initialize_matrix_A (A, chrec_b, nb_vars_a, -1);
init_a = int_cst_value (initialize_matrix_A (A, chrec_a, 0, 1));
init_b = int_cst_value (initialize_matrix_A (A, chrec_b, nb_vars_a, -1));
gamma = init_b - init_a;
/* Don't do all the hard work of solving the Diophantine equation
@ -2369,7 +2395,8 @@ analyze_siv_subscript (tree chrec_a,
tree chrec_b,
conflict_function **overlaps_a,
conflict_function **overlaps_b,
tree *last_conflicts)
tree *last_conflicts,
int loop_nest_num)
{
dependence_stats.num_siv++;
@ -2377,17 +2404,17 @@ analyze_siv_subscript (tree chrec_a,
fprintf (dump_file, "(analyze_siv_subscript \n");
if (evolution_function_is_constant_p (chrec_a)
&& evolution_function_is_affine_p (chrec_b))
&& evolution_function_is_affine_in_loop (chrec_b, loop_nest_num))
analyze_siv_subscript_cst_affine (chrec_a, chrec_b,
overlaps_a, overlaps_b, last_conflicts);
else if (evolution_function_is_affine_p (chrec_a)
else if (evolution_function_is_affine_in_loop (chrec_a, loop_nest_num)
&& evolution_function_is_constant_p (chrec_b))
analyze_siv_subscript_cst_affine (chrec_b, chrec_a,
overlaps_b, overlaps_a, last_conflicts);
else if (evolution_function_is_affine_p (chrec_a)
&& evolution_function_is_affine_p (chrec_b))
else if (evolution_function_is_affine_in_loop (chrec_a, loop_nest_num)
&& evolution_function_is_affine_in_loop (chrec_b, loop_nest_num))
{
if (!chrec_contains_symbols (chrec_a)
&& !chrec_contains_symbols (chrec_b))
@ -2649,7 +2676,7 @@ analyze_overlapping_iterations (tree chrec_a,
else if (siv_subscript_p (chrec_a, chrec_b))
analyze_siv_subscript (chrec_a, chrec_b,
overlap_iterations_a, overlap_iterations_b,
last_conflicts);
last_conflicts, lnn);
else
analyze_miv_subscript (chrec_a, chrec_b,

72
gcc/tree-scalar-evolution.c
View File

@ -1952,26 +1952,23 @@ loop_closed_phi_def (tree var)
}
/* Analyze all the parameters of the chrec, between INSTANTIATION_LOOP
and EVOLUTION_LOOP, that were left under a symbolic form. CHREC is
the scalar evolution to instantiate. CACHE is the cache of already
instantiated values. FLAGS modify the way chrecs are instantiated.
and EVOLUTION_LOOP, that were left under a symbolic form.
CHREC is the scalar evolution to instantiate.
CACHE is the cache of already instantiated values.
FOLD_CONVERSIONS should be set to true when the conversions that
may wrap in signed/pointer type are folded, as long as the value of
the chrec is preserved.
SIZE_EXPR is used for computing the size of the expression to be
instantiated, and to stop if it exceeds some limit. */
/* Values for FLAGS. */
enum
{
INSERT_SUPERLOOP_CHRECS = 1, /* Loop invariants are replaced with chrecs
in outer loops. */
FOLD_CONVERSIONS = 2 /* The conversions that may wrap in
signed/pointer type are folded, as long as the
value of the chrec is preserved. */
};
static tree
instantiate_scev_1 (struct loop *instantiation_loop,
struct loop *evolution_loop, tree chrec,
int flags, htab_t cache, int size_expr)
bool fold_conversions, htab_t cache, int size_expr)
{
tree res, op0, op1, op2;
basic_block def_bb;
@ -1995,8 +1992,7 @@ instantiate_scev_1 (struct loop *instantiation_loop,
evolutions in outer loops), nothing to do. */
if (!def_bb
|| loop_depth (def_bb->loop_father) == 0
|| (!(flags & INSERT_SUPERLOOP_CHRECS)
&& !flow_bb_inside_loop_p (instantiation_loop, def_bb)))
|| !flow_bb_inside_loop_p (instantiation_loop, def_bb))
return chrec;
/* We cache the value of instantiated variable to avoid exponential
@ -2052,7 +2048,7 @@ instantiate_scev_1 (struct loop *instantiation_loop,
else if (res != chrec_dont_know)
res = instantiate_scev_1 (instantiation_loop, evolution_loop, res,
flags, cache, size_expr);
fold_conversions, cache, size_expr);
bitmap_clear_bit (already_instantiated, SSA_NAME_VERSION (chrec));
@ -2062,12 +2058,14 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case POLYNOMIAL_CHREC:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
CHREC_LEFT (chrec), flags, cache, size_expr);
CHREC_LEFT (chrec), fold_conversions, cache,
size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
CHREC_RIGHT (chrec), flags, cache, size_expr);
CHREC_RIGHT (chrec), fold_conversions, cache,
size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
@ -2082,13 +2080,13 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case POINTER_PLUS_EXPR:
case PLUS_EXPR:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0), flags, cache,
TREE_OPERAND (chrec, 0), fold_conversions, cache,
size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 1), flags, cache,
TREE_OPERAND (chrec, 1), fold_conversions, cache,
size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
@ -2104,14 +2102,14 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case MINUS_EXPR:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0), flags, cache,
TREE_OPERAND (chrec, 0), fold_conversions, cache,
size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 1),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
@ -2127,13 +2125,13 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case MULT_EXPR:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 1),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
@ -2149,11 +2147,11 @@ instantiate_scev_1 (struct loop *instantiation_loop,
CASE_CONVERT:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
if (flags & FOLD_CONVERSIONS)
if (fold_conversions)
{
tree tmp = chrec_convert_aggressive (TREE_TYPE (chrec), op0);
if (tmp)
@ -2166,7 +2164,7 @@ instantiate_scev_1 (struct loop *instantiation_loop,
/* If we used chrec_convert_aggressive, we can no longer assume that
signed chrecs do not overflow, as chrec_convert does, so avoid
calling it in that case. */
if (flags & FOLD_CONVERSIONS)
if (fold_conversions)
return fold_convert (TREE_TYPE (chrec), op0);
return chrec_convert (TREE_TYPE (chrec), op0, NULL_TREE);
@ -2187,19 +2185,19 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case 3:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 1),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
op2 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 2),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op2 == chrec_dont_know)
return chrec_dont_know;
@ -2214,13 +2212,13 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case 2:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
op1 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 1),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op1 == chrec_dont_know)
return chrec_dont_know;
@ -2232,7 +2230,7 @@ instantiate_scev_1 (struct loop *instantiation_loop,
case 1:
op0 = instantiate_scev_1 (instantiation_loop, evolution_loop,
TREE_OPERAND (chrec, 0),
flags, cache, size_expr);
fold_conversions, cache, size_expr);
if (op0 == chrec_dont_know)
return chrec_dont_know;
if (op0 == TREE_OPERAND (chrec, 0))
@ -2272,8 +2270,8 @@ instantiate_scev (struct loop *instantiation_loop, struct loop *evolution_loop,
fprintf (dump_file, ")\n");
}
res = instantiate_scev_1 (instantiation_loop, evolution_loop, chrec,
INSERT_SUPERLOOP_CHRECS, cache, 0);
res = instantiate_scev_1 (instantiation_loop, evolution_loop, chrec, false,
cache, 0);
if (dump_file && (dump_flags & TDF_DETAILS))
{
@ -2296,7 +2294,7 @@ tree
resolve_mixers (struct loop *loop, tree chrec)
{
htab_t cache = htab_create (10, hash_scev_info, eq_scev_info, del_scev_info);
tree ret = instantiate_scev_1 (loop, loop, chrec, FOLD_CONVERSIONS, cache, 0);
tree ret = instantiate_scev_1 (loop, loop, chrec, true, cache, 0);
htab_delete (cache);
return ret;
}