bacb6afc6c
Rewrite arena_slab_regind() to provide sufficient constant data for the compiler to perform division strength reduction. This replaces more general manual strength reduction that was implemented before arena_bin_info was compile-time-constant. It would be possible to slightly improve on the compiler-generated division code by taking advantage of range limits that the compiler doesn't know about.
36 lines
889 B
C
36 lines
889 B
C
#include "test/jemalloc_test.h"
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TEST_BEGIN(test_arena_slab_regind)
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{
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szind_t binind;
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for (binind = 0; binind < NBINS; binind++) {
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size_t regind;
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extent_t slab;
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const arena_bin_info_t *bin_info = &arena_bin_info[binind];
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extent_init(&slab, NULL, mallocx(bin_info->slab_size,
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MALLOCX_LG_ALIGN(LG_PAGE)), bin_info->slab_size, 0, 0, true,
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false, true, true);
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assert_ptr_not_null(extent_addr_get(&slab),
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"Unexpected malloc() failure");
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for (regind = 0; regind < bin_info->nregs; regind++) {
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void *reg = (void *)((uintptr_t)extent_addr_get(&slab) +
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(bin_info->reg_size * regind));
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assert_zu_eq(arena_slab_regind(&slab, binind, reg),
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regind,
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"Incorrect region index computed for size %zu",
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bin_info->reg_size);
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}
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free(extent_addr_get(&slab));
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}
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}
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TEST_END
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int
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main(void)
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{
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return (test(
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test_arena_slab_regind));
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}
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