Viewing file:  spill_3.c (1.41 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -ftree-vectorize -msve-vector-bits=scalable" } */
#include <stdint.h>
void consumer (void *);
#define TEST_LOOP(TYPE) \
void \
multi_loop_##TYPE (TYPE *x, TYPE val1, TYPE val2, int n) \
{ \
for (int i = 0; i < n; ++i) \
{ \
x[i * 2] += val1; \
x[i * 2 + 1] += val2; \
} \
consumer (x); \
for (int i = 0; i < n; ++i) \
{ \
x[i * 2] += val1; \
x[i * 2 + 1] += val2; \
} \
consumer (x); \
for (int i = 0; i < n; ++i) \
{ \
x[i * 2] += val1; \
x[i * 2 + 1] += val2; \
} \
consumer (x); \
}
/* One iteration is enough. */
TEST_LOOP (uint8_t);
TEST_LOOP (uint16_t);
/* Two iterations are enough. Complete unrolling makes sense
even at -O2. */
TEST_LOOP (uint32_t);
/* Four iterations are needed; ought to stay a loop. */
TEST_LOOP (uint64_t);
/* { dg-final { scan-assembler {\tld1b\tz[0-9]\.b} } } */
/* { dg-final { scan-assembler {\tld1h\tz[0-9]\.h} } } */
/* { dg-final { scan-assembler {\tld1w\tz[0-9]\.s} } } */
/* { dg-final { scan-assembler {\tld1d\tz[0-9]\.d} } } */
/* { dg-final { scan-assembler-not {\tldr\tz[0-9]} } } */
/* { dg-final { scan-assembler-not {\tstr\tz[0-9]} } } */
/* { dg-final { scan-assembler-not {\tldr\tp[0-9]} } } */
/* { dg-final { scan-assembler-not {\tstr\tp[0-9]} } } */
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