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Complete ao_ref_init_from_vn_reference for all refs

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This makes sure we can create ao_refs from all VN operands we create.

	* tree-ssa-sccvn.cc (ao_ref_init_from_vn_reference): Add
	TARGET_MEM_REF support.  Handle more bases.
This commit is contained in:
Richard Biener 2024-02-27 13:55:15 +01:00
parent ec1cdad89a
commit 8bdfb0c2d5
1 changed files with 33 additions and 18 deletions
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51
gcc/tree-ssa-sccvn.cc
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@ -1148,8 +1148,29 @@ ao_ref_init_from_vn_reference (ao_ref *ref,
{
switch (op->opcode)
{
/* These may be in the reference ops, but we cannot do anything
sensible with them here. */
case CALL_EXPR:
return false;
/* Record the base objects. */
case MEM_REF:
*op0_p = build2 (MEM_REF, op->type,
NULL_TREE, op->op0);
MR_DEPENDENCE_CLIQUE (*op0_p) = op->clique;
MR_DEPENDENCE_BASE (*op0_p) = op->base;
op0_p = &TREE_OPERAND (*op0_p, 0);
break;
case TARGET_MEM_REF:
*op0_p = build5 (TARGET_MEM_REF, op->type,
NULL_TREE, op->op2, op->op0,
op->op1, ops[i+1].op0);
MR_DEPENDENCE_CLIQUE (*op0_p) = op->clique;
MR_DEPENDENCE_BASE (*op0_p) = op->base;
op0_p = &TREE_OPERAND (*op0_p, 0);
++i;
break;
/* Unwrap some of the wrapped decls. */
case ADDR_EXPR:
/* Apart from ADDR_EXPR arguments to MEM_REF. */
if (base != NULL_TREE
@ -1170,21 +1191,16 @@ ao_ref_init_from_vn_reference (ao_ref *ref,
break;
}
/* Fallthru. */
case CALL_EXPR:
return false;
/* Record the base objects. */
case MEM_REF:
*op0_p = build2 (MEM_REF, op->type,
NULL_TREE, op->op0);
MR_DEPENDENCE_CLIQUE (*op0_p) = op->clique;
MR_DEPENDENCE_BASE (*op0_p) = op->base;
op0_p = &TREE_OPERAND (*op0_p, 0);
break;
case VAR_DECL:
case PARM_DECL:
case CONST_DECL:
case RESULT_DECL:
/* ??? We shouldn't see these, but un-canonicalize what
copy_reference_ops_from_ref does when visiting MEM_REF. */
case VAR_DECL:
/* ??? And for this only have DECL_HARD_REGISTER. */
case STRING_CST:
/* This can show up in ARRAY_REF bases. */
case INTEGER_CST:
case SSA_NAME:
*op0_p = op->op0;
op0_p = NULL;
@ -1234,13 +1250,12 @@ ao_ref_init_from_vn_reference (ao_ref *ref,
case VIEW_CONVERT_EXPR:
break;
case STRING_CST:
case INTEGER_CST:
case POLY_INT_CST:
case COMPLEX_CST:
case VECTOR_CST:
case REAL_CST:
case FIXED_CST:
case CONSTRUCTOR:
case CONST_DECL:
return false;
default: