From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c | 51 +++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c (limited to 'gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c') diff --git a/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c b/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c new file mode 100644 index 000000000..16bd5c910 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c @@ -0,0 +1,51 @@ +/* { dg-do compile } */ +/* { dg-do run } */ +/* { dg-options "-O2 -fpredictive-commoning -fdump-tree-pcom-details" } */ + +void abort (void); + +unsigned fib[1000]; + +__attribute__ ((noinline)) +void count_fib(void) +{ + int i; + + fib[0] = 0; + fib[1] = 1; + for (i = 2; i < 1000; i++) + fib[i] = (fib[i-1] + fib[i - 2]) & 0xffff; +} + +unsigned avg[1000]; + +__attribute__ ((noinline)) +void count_averages(int n) +{ + int i; + + for (i = 1; i < n; i++) + avg[i] = (((unsigned long) fib[i - 1] + fib[i] + fib[i + 1]) / 3) & 0xffff; +} + +int main(void) +{ + count_fib (); + count_averages (999); + + if (fib[19] != 4181 || avg[19] != 4510) + abort (); + + if (fib[999] != 162 || avg[998] != 21953) + abort (); + + return 0; +} + +/* Verify that both loops were transformed and unrolled. */ +/* { dg-final { scan-tree-dump-times "Unrolling 2 times." 2 "pcom"} } */ + +/* Also check that we undid the transformation previously made by PRE. */ +/* { dg-final { scan-tree-dump-times "looparound ref" 1 "pcom"} } */ + +/* { dg-final { cleanup-tree-dump "pcom" } } */ -- cgit v1.2.3