Mercurial > hg > CbC > CbC_gcc
diff gcc/testsuite/gcc.dg/store-motion-fgcse-sm.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/gcc.dg/store-motion-fgcse-sm.c Fri Oct 27 22:46:09 2017 +0900 @@ -0,0 +1,33 @@ +/* { dg-do run } */ +/* { dg-options "-O2 -ftree-pre -fno-tree-loop-im -fgcse-sm -fdump-rtl-store_motion" } */ + +/* tree-pre moves the *sum load out of the loop. ftree-loop-im moves the *sum + store out of the loop, so we disable it, to allow fgcse-sm to do it + instead. */ + +#include <stdlib.h> + +void __attribute__((noinline)) +f (unsigned int *__restrict__ a, unsigned int *__restrict__ sum, unsigned int n) +{ + unsigned int i; + for (i = 0; i < n; ++i) + *sum += a[i]; +} + +int +main () +{ + unsigned int a[] = { 1, 10, 100 }; + unsigned sum = 1000; + + f (a, &sum, 3); + if (sum != 1111) + abort (); + + return 0; +} + +/* Check that -fgcse-sm did something for f. */ +/* { dg-final { scan-rtl-dump "STORE_MOTION of f, .* basic blocks, 1 insns deleted, 1 insns created" "store_motion" } } */ +