diff --git a/gcc/match.pd b/gcc/match.pd index 8f3edfa2fa62845cdf6ac4f71e49510399e08aea..c7ee57d4bc20302942b808345565fb09cde38213 100644 --- a/gcc/match.pd +++ b/gcc/match.pd @@ -348,11 +348,16 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) /* But not for 0 / 0 so that we can get the proper warnings and errors. */ (if (!integer_zerop (@1)) @0)) - /* X / -1 is -X. */ + /* X / -1 is -X. */ (simplify - (div @0 integer_minus_onep@1) - (if (!TYPE_UNSIGNED (type)) - (negate @0))) + (div @0 integer_minus_onep@1) + (if (!TYPE_UNSIGNED (type)) + (negate @0))) + /* X / bool_range_Y is X. */ + (simplify + (div @0 SSA_NAME@1) + (if (INTEGRAL_TYPE_P (type) && ssa_name_has_boolean_range (@1)) + @0)) /* X / X is one. */ (simplify (div @0 @0) diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr96094.c b/gcc/testsuite/gcc.dg/tree-ssa/pr96094.c new file mode 100644 index 0000000000000000000000000000000000000000..fe9163dda3e4bf5f5857a19a47cc3c2303247313 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr96094.c @@ -0,0 +1,34 @@ +/* PR tree-optimization/96094 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized" } */ +/* { dg-final { scan-tree-dump-times "return 34;" 2 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "return y_\[0-9]*\\\(D\\\);" 2 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "return \[^\n\r;]*;" 4 "optimized" } } */ + +int +foo (int x) +{ + if (x >= 2U) + return 34; + return 34 / x; +} + +int +bar (int x, int y) +{ + if (x >= 2U) + return y; + return y / x; +} + +int +baz (_Bool x) +{ + return 34 / x; +} + +int +qux (_Bool x, int y) +{ + return y / x; +}