diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/range-op-float.cc | 40 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-1.c | 84 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-2.c | 23 |
3 files changed, 142 insertions, 5 deletions
diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc index 74ac465..2db83ae 100644 --- a/gcc/range-op-float.cc +++ b/gcc/range-op-float.cc @@ -607,6 +607,10 @@ foperator_equal::fold_range (irange &r, tree type, { if (op1 == op2) r = range_true (type); + // If one operand is -0.0 and other 0.0, they are still equal. + else if (real_iszero (&op1.lower_bound ()) + && real_iszero (&op2.lower_bound ())) + r = range_true (type); else r = range_false (type); } @@ -617,7 +621,18 @@ foperator_equal::fold_range (irange &r, tree type, frange tmp = op1; tmp.intersect (op2); if (tmp.undefined_p ()) - r = range_false (type); + { + // If one range is [whatever, -0.0] and another + // [0.0, whatever2], we don't know anything either, + // because -0.0 == 0.0. + if ((real_iszero (&op1.upper_bound ()) + && real_iszero (&op2.lower_bound ())) + || (real_iszero (&op1.lower_bound ()) + && real_iszero (&op2.upper_bound ()))) + r = range_true_and_false (type); + else + r = range_false (type); + } else r = range_true_and_false (type); } @@ -708,10 +723,14 @@ foperator_not_equal::fold_range (irange &r, tree type, // consist of a single value, and then compare them. else if (op1.singleton_p () && op2.singleton_p ()) { - if (op1 != op2) - r = range_true (type); - else + if (op1 == op2) r = range_false (type); + // If one operand is -0.0 and other 0.0, they are still equal. + else if (real_iszero (&op1.lower_bound ()) + && real_iszero (&op2.lower_bound ())) + r = range_false (type); + else + r = range_true (type); } else if (!maybe_isnan (op1, op2)) { @@ -720,7 +739,18 @@ foperator_not_equal::fold_range (irange &r, tree type, frange tmp = op1; tmp.intersect (op2); if (tmp.undefined_p ()) - r = range_true (type); + { + // If one range is [whatever, -0.0] and another + // [0.0, whatever2], we don't know anything either, + // because -0.0 == 0.0. + if ((real_iszero (&op1.upper_bound ()) + && real_iszero (&op2.lower_bound ())) + || (real_iszero (&op1.lower_bound ()) + && real_iszero (&op2.upper_bound ()))) + r = range_true_and_false (type); + else + r = range_true (type); + } else r = range_true_and_false (type); } diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-1.c b/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-1.c new file mode 100644 index 0000000..ebd4c50 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-1.c @@ -0,0 +1,84 @@ +/* PR tree-optimization/108540 */ + +__attribute__((noipa)) void +bar (const char *cp, unsigned long size, char sign, int dsgn) +{ + if (__builtin_strcmp (cp, "ZERO") != 0 || size != 4 || sign != '-' || dsgn != 1) + __builtin_abort (); +} + +__attribute__((noipa)) void +foo (int x, int ch, double d) +{ + const char *cp = ""; + unsigned long size = 0; + char sign = '\0'; + switch (x) + { + case 42: + if (__builtin_isinf (d)) + { + if (d < 0) + sign = '-'; + cp = "Inf"; + size = 3; + break; + } + if (__builtin_isnan (d)) + { + cp = "NaN"; + size = 3; + break; + } + if (d < 0) + { + d = -d; + sign = '-'; + } + else if (d == 0.0 && __builtin_signbit (d)) + sign = '-'; + else + sign = '\0'; + if (ch == 'a' || ch == 'A') + { + union U { long long l; double d; } u; + int dsgn; + u.d = d; + if (u.l < 0) + { + dsgn = 1; + u.l &= 0x7fffffffffffffffLL; + } + else + dsgn = 0; + if (__builtin_isinf (d)) + { + cp = "INF"; + size = 3; + } + else if (__builtin_isnan (d)) + { + cp = "NAN"; + size = 3; + } + else if (d == 0) + { + cp = "ZERO"; + size = 4; + } + else + { + cp = "WRONG"; + size = 5; + } + bar (cp, size, sign, dsgn); + } + } +} + +int +main () +{ + foo (42, 'a', -0.0); + return 0; +} diff --git a/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-2.c b/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-2.c new file mode 100644 index 0000000..f1b13c9 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/ieee/pr108540-2.c @@ -0,0 +1,23 @@ +/* PR tree-optimization/108540 */ + +__attribute__((noipa)) int +foo (int x, double d) +{ + if (x == 42) + d = -0.0; + if (d == 0.0) + return 42; + return 12; +} + +int +main () +{ + if (foo (42, 5.0) != 42 + || foo (42, 0.0) != 42 + || foo (42, -0.0) != 42 + || foo (10, 5.0) != 12 + || foo (10, 0.0) != 42 + || foo (10, -0.0) != 42) + __builtin_abort (); +} |