middle-end/103248 - fix RDIV_EXPR handling with fixed point
Commit Message
This fixes the previous adjustment to operation_could_trap_helper_p
where I failed to realize that RDIV_EXPR is also used for
fixed-point types. It also fixes that handling by properly
checking for a fixed_zerop divisor.
Bootstrapped and tested on x86_64-unknown-linux-gnu, OK?
Thanks,
Richard.
2021-11-16 Richard Biener <rguenther@suse.de>
PR middle-end/103248
* tree-eh.c (operation_could_trap_helper_p): Properly handle
fixed-point RDIV_EXPR.
* gcc.dg/pr103248.c: New testcase.
---
gcc/testsuite/gcc.dg/pr103248.c | 8 ++++++++
gcc/tree-eh.c | 12 +++++++++---
2 files changed, 17 insertions(+), 3 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/pr103248.c
new file mode 100644
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+/* { dg-require-effective-target fixed_point } */
+/* { dg-options "-fnon-call-exceptions" } */
+
+_Accum sa;
+int c;
+
+void div_csa() { c /= sa; }
@@ -2474,10 +2474,16 @@ operation_could_trap_helper_p (enum tree_code op,
return false;
case RDIV_EXPR:
- if (honor_snans)
+ if (fp_operation)
+ {
+ if (honor_snans)
+ return true;
+ return flag_trapping_math;
+ }
+ /* Fixed point operations also use RDIV_EXPR. */
+ if (!TREE_CONSTANT (divisor) || fixed_zerop (divisor))
return true;
- gcc_assert (fp_operation);
- return flag_trapping_math;
+ return false;
case LT_EXPR:
case LE_EXPR: