Bug 93348 reports an ICE on certain cases of casts of expressions that
may appear only in unevaluated parts of integer constant expressions,
arising from the generation of nested C_MAYBE_CONST_EXPRs. This patch
fixes it by adding a call to remove_c_maybe_const_expr in the
integer-operands case, as is done in other similar cases.
Bootstrapped with no regressions for x86_64-pc-linux-gnu. Applied to
mainline. Will also backport to GCC 9 and 8 branches.
gcc/c:
2020-01-22 Joseph Myers <jos...@codesourcery.com>
PR c/93348
* c-typeck.c (build_c_cast): Call remove_c_maybe_const_expr on
argument with integer operands.
gcc/testsuite:
2020-01-22 Joseph Myers <jos...@codesourcery.com>
PR c/93348
* gcc.c-torture/compile/pr93348-1.c: New test.
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 9866c83faf2..8df0849bd8b 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -5715,6 +5715,8 @@ build_c_cast (location_t loc, tree type, tree expr)
expr = TREE_OPERAND (expr, 0);
value = expr;
+ if (int_operands)
+ value = remove_c_maybe_const_expr (value);
if (type == error_mark_node || expr == error_mark_node)
return error_mark_node;
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr93348-1.c
b/gcc/testsuite/gcc.c-torture/compile/pr93348-1.c
new file mode 100644
index 00000000000..d2edec565ee
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr93348-1.c
@@ -0,0 +1,5 @@
+int
+ya (void)
+{
+ return (long int) (1 / 0);
+}
--
Joseph S. Myers
jos...@codesourcery.com
