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Diffstat (limited to 'gcc/testsuite/gcc.dg/pr23911.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr23911.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr23911.c b/gcc/testsuite/gcc.dg/pr23911.c new file mode 100644 index 000000000..b77dbaab9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr23911.c @@ -0,0 +1,21 @@ +/* This was a missed optimization in tree constant propagation + that CSE would catch later on. */ +/* { dg-do compile } */ +/* { dg-options "-O -fdump-tree-dce2" } */ + +double _Complex *a; +static const double _Complex b[10] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; + +void +test (void) +{ + a[0] = b[0] + b[1]; + a[1] = b[0] + b[1]; + return; +} + +/* After DCE2 which runs after FRE, the expressions should be fully + constant folded. There should be no loads from b left. */ +/* { dg-final { scan-tree-dump-times "__complex__ \\\(1.0e\\\+0, 0.0\\\)" 2 "dce2" } } */ +/* { dg-final { scan-tree-dump-times "= b" 0 "dce2" } } */ +/* { dg-final { cleanup-tree-dump "dce2" } } */ |