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| author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
| commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
| tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c | |
| parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
| download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip | |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c')
| -rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c new file mode 100644 index 000000000..de98ccc4c --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/ldist-2.c @@ -0,0 +1,31 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */ + +void foo (int * __restrict__ a, + int * __restrict__ b, + int * __restrict__ c) +{ + int i; + + for (i=1; i < 10; i++) + { + a[i] += c[i]; + b[i] = a[i - 1] + 1; + } + + /* This loop is not distributed because the cost of spliting it: + + | for (i=1; i < N; i++) + | a[i] += c[i]; + | + | for (i=1; i < N; i++) + | b[i] = a[i - 1] + 1; + + is higher due to data in array A that is written and then read in + another task. The cost model should forbid the transformation in + this case. + */ +} + +/* { dg-final { scan-tree-dump-times "distributed: split to 2 loops" 0 "ldist" } } */ +/* { dg-final { cleanup-tree-dump "ldist" } } */ |