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* [gcc r14-8650] lower-bitint: Fix up VIEW_CONVERT_EXPR handling in handle_operand_addr [PR113639]
@ 2024-01-31 9:55 Jakub Jelinek
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From: Jakub Jelinek @ 2024-01-31 9:55 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:90ac839a470d61ffcd9eee0d7d37ca9c385dfefb
commit r14-8650-g90ac839a470d61ffcd9eee0d7d37ca9c385dfefb
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jan 31 10:50:33 2024 +0100
lower-bitint: Fix up VIEW_CONVERT_EXPR handling in handle_operand_addr [PR113639]
Yet another spot where we need to treat VIEW_CONVERT_EXPR differently
from NOP_EXPR/CONVERT_EXPR.
2024-01-31 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/113639
* gimple-lower-bitint.cc (bitint_large_huge::handle_operand_addr):
For VIEW_CONVERT_EXPR set rhs1 to its operand.
* gcc.dg/bitint-79.c: New test.
Diff:
---
gcc/gimple-lower-bitint.cc | 2 ++
gcc/testsuite/gcc.dg/bitint-79.c | 16 ++++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/gcc/gimple-lower-bitint.cc b/gcc/gimple-lower-bitint.cc
index af167450ec05..a3802c61816a 100644
--- a/gcc/gimple-lower-bitint.cc
+++ b/gcc/gimple-lower-bitint.cc
@@ -2159,6 +2159,8 @@ bitint_large_huge::handle_operand_addr (tree op, gimple *stmt,
gcc_assert (gimple_assign_cast_p (g));
tree rhs1 = gimple_assign_rhs1 (g);
bitint_prec_kind kind = bitint_prec_small;
+ if (TREE_CODE (rhs1) == VIEW_CONVERT_EXPR)
+ rhs1 = TREE_OPERAND (rhs1, 0);
gcc_assert (INTEGRAL_TYPE_P (TREE_TYPE (rhs1)));
if (TREE_CODE (TREE_TYPE (rhs1)) == BITINT_TYPE)
kind = bitint_precision_kind (TREE_TYPE (rhs1));
diff --git a/gcc/testsuite/gcc.dg/bitint-79.c b/gcc/testsuite/gcc.dg/bitint-79.c
new file mode 100644
index 000000000000..e7422c06acf7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/bitint-79.c
@@ -0,0 +1,16 @@
+/* PR tree-optimization/113639 */
+/* { dg-do compile { target bitint } } */
+/* { dg-options "-O2 -std=c23" } */
+
+int j, k;
+#if __BITINT_MAXWIDTH__ >= 162
+struct S { _BitInt(162) n; };
+void bar (_BitInt(162) x);
+
+void
+foo (struct S s)
+{
+ bar (s.n * j);
+ (void) (s.n * k);
+}
+#endif
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