diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/recip-4.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/recip-4.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/recip-4.c b/gcc/testsuite/gcc.dg/tree-ssa/recip-4.c new file mode 100644 index 00000000000..20d7681d28d --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/recip-4.c @@ -0,0 +1,45 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fno-trapping-math -funsafe-math-optimizations -fdump-tree-recip" } */ + +/* based on the test case in pr23109 */ + +double F[2] = { 0., 0. }, e = 0.; + +/* Nope, we cannot prove the optimization is worthwhile in this case. */ +void f () +{ + int i; + double E, W, P, d; + + W = 1.; + d = 2.*e; + E = 1. - d; + + if( d > 0.01 ) + { + P = ( W < E ) ? (W - E)/d : (E - W)/d; + F[i] += P; + } +} + +/* We also cannot prove the optimization is worthwhile in this case. */ +float g () +{ + int i; + double E, W, P, d; + + W = 1.; + d = 2.*e; + E = 1. - d; + + if( d > 0.01 ) + { + P = ( W < E ) ? (W - E)/d : (E - W)/d; + F[i] += P; + } + + return 1.0 / d; +} + +/* { dg-final { scan-tree-dump-not "reciptmp" "recip" } } */ +/* { dg-final { cleanup-tree-dump "recip" } } */ |