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vect: Add missed opcodes in vect_get_smallest_scalar_type [PR115228]

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Some opcodes are missed when determining the smallest scalar type for a
vectorizable statement. Currently, this bug does not cause any problem,
because vect_get_smallest_scalar_type is only used to compute max nunits
vectype, and even statement with missed opcode is incorrectly bypassed,
the max nunits vectype could also be rightly deduced from def statements
for operands of the statement.

In the future, if this function will be called to do other thing, we may
get something wrong. So fix it in this patch.

2024-08-05 Feng Xue <fxue@os.amperecomputing.com>

gcc/
	PR tree-optimization/115228
	* tree-vect-data-refs.cc (vect_get_smallest_scalar_type): Add
	missed opcodes that involve widening operation.
This commit is contained in:
Feng Xue 2024-08-05 15:53:19 +08:00
parent 3c089ee5d5
commit 95990db02b
1 changed files with 3 additions and 0 deletions
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3
gcc/tree-vect-data-refs.cc
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@ -162,7 +162,10 @@ vect_get_smallest_scalar_type (stmt_vec_info stmt_info, tree scalar_type)
if (gimple_assign_cast_p (assign)
|| gimple_assign_rhs_code (assign) == DOT_PROD_EXPR
|| gimple_assign_rhs_code (assign) == WIDEN_SUM_EXPR
|| gimple_assign_rhs_code (assign) == SAD_EXPR
|| gimple_assign_rhs_code (assign) == WIDEN_MULT_EXPR
|| gimple_assign_rhs_code (assign) == WIDEN_MULT_PLUS_EXPR
|| gimple_assign_rhs_code (assign) == WIDEN_MULT_MINUS_EXPR
|| gimple_assign_rhs_code (assign) == WIDEN_LSHIFT_EXPR
|| gimple_assign_rhs_code (assign) == FLOAT_EXPR)
{