https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110018
Bug ID: 110018
Summary: Missing vectorizable_conversion(unsigned char ->
double) for BB vectorizer
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: crazylht at gmail dot com
Target Milestone: ---
When Looking at PR109812, I noticed there's missing vectorizable_conversion for
BB vectorizer when target doesn't support direct optab for unsigned char to
double. But actually it can be vectorized via unsigned char -> short/int/long
long -> double when vectorizable_conversion is ok for any of the immediate
type.
Currently, when modifier is NONE, vectorizable_conversion doesn't try any
immediate type, it can be extended similar like WIDEN.
5158 case NONE:
5159 if (code != FIX_TRUNC_EXPR
5160 && code != FLOAT_EXPR
5161 && !CONVERT_EXPR_CODE_P (code))
5162 return false;
5163 if (supportable_convert_operation (code, vectype_out, vectype_in,
&code1))
5164 break;
5165 /* FALLTHRU */
void
foo (double* __restrict a, unsigned char* b)
{
a[0] = b[0];
a[1] = b[1];
a[2] = b[2];
a[3] = b[3];
a[4] = b[4];
a[5] = b[5];
a[6] = b[6];
a[7] = b[7];
}
missed: conversion not supported by target.
