diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/match.pd | 10 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/ubsan/pr106990.c | 29 |
2 files changed, 35 insertions, 4 deletions
diff --git a/gcc/match.pd b/gcc/match.pd index fd64ad7..d07c0e4 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -1331,8 +1331,9 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) /* (~X - ~Y) -> Y - X. */ (simplify (minus (bit_not @0) (bit_not @1)) - (with { tree utype = unsigned_type_for (type); } - (convert (minus (convert:utype @1) (convert:utype @0))))) + (if (!TYPE_OVERFLOW_SANITIZED (type)) + (with { tree utype = unsigned_type_for (type); } + (convert (minus (convert:utype @1) (convert:utype @0)))))) /* ~(X - Y) -> ~X + Y. */ (simplify @@ -8176,5 +8177,6 @@ and, /* -x & 1 -> x & 1. */ (simplify - (bit_and (negate @0) integer_onep@1) - (bit_and @0 @1)) + (bit_and (negate @0) integer_onep@1) + (if (!TYPE_OVERFLOW_SANITIZED (type)) + (bit_and @0 @1))) diff --git a/gcc/testsuite/c-c++-common/ubsan/pr106990.c b/gcc/testsuite/c-c++-common/ubsan/pr106990.c new file mode 100644 index 0000000..5bd46af --- /dev/null +++ b/gcc/testsuite/c-c++-common/ubsan/pr106990.c @@ -0,0 +1,29 @@ +/* PR tree-optimization/106990 */ +/* { dg-do run { target int32 } } */ +/* { dg-options "-fsanitize=signed-integer-overflow" } */ + +__attribute__((noipa)) int +foo (void) +{ + int x = -1956816001; + int y = 1999200512; + return ~x - ~y; +} + +__attribute__((noipa)) int +bar (void) +{ + int x = -__INT_MAX__ - 1; + return -x & 1; +} + +int +main () +{ + foo (); + bar (); + return 0; +} + +/* { dg-output "signed integer overflow: 1956816000 - -1999200513 cannot be represented in type 'int'\[^\n\r]*(\n|\r\n|\r)" } */ +/* { dg-output "\[^\n\r]*negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself" } */ |