56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
// RUN: %clang_analyze_cc1 %s \
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// RUN: -analyzer-checker=core,alpha.security.ArrayBoundV2 \
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// RUN: -analyzer-checker=debug.ExprInspection \
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// RUN: -triple x86_64-unknown-linux-gnu \
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// RUN: -verify
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// This test is here to check if there is no significant run-time regression
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// related to the assume machinery. The analysis should finish in less than 10
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// seconds.
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// expected-no-diagnostics
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typedef unsigned char uint8_t;
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typedef unsigned short uint16_t;
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typedef unsigned long uint64_t;
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int filter_slice_word(int sat_linesize, int sigma, int radius, uint64_t *sat,
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uint64_t *square_sat, int width, int height,
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int src_linesize, int dst_linesize, const uint16_t *src,
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uint16_t *dst, int jobnr, int nb_jobs) {
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const int starty = height * jobnr / nb_jobs;
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const int endy = height * (jobnr + 1) / nb_jobs;
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for (int y = starty; y < endy; y++) {
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int lower_y = y - radius < 0 ? 0 : y - radius;
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int higher_y = y + radius + 1 > height ? height : y + radius + 1;
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int dist_y = higher_y - lower_y;
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for (int x = 0; x < width; x++) {
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int lower_x = x - radius < 0 ? 0 : x - radius;
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int higher_x = x + radius + 1 > width ? width : x + radius + 1;
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int count = dist_y * (higher_x - lower_x);
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// The below hunk caused significant regression in run-time.
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#if 1
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uint64_t sum = sat[higher_y * sat_linesize + higher_x] -
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sat[higher_y * sat_linesize + lower_x] -
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sat[lower_y * sat_linesize + higher_x] +
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sat[lower_y * sat_linesize + lower_x];
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uint64_t square_sum = square_sat[higher_y * sat_linesize + higher_x] -
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square_sat[higher_y * sat_linesize + lower_x] -
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square_sat[lower_y * sat_linesize + higher_x] +
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square_sat[lower_y * sat_linesize + lower_x];
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uint64_t mean = sum / count;
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uint64_t var = (square_sum - sum * sum / count) / count;
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dst[y * dst_linesize + x] =
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(sigma * mean + var * src[y * src_linesize + x]) / (sigma + var);
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#endif
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}
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}
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return 0;
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}
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