From 90ac839a470d61ffcd9eee0d7d37ca9c385dfefb Mon Sep 17 00:00:00 2001 From: Jakub Jelinek Date: Wed, 31 Jan 2024 10:50:33 +0100 Subject: [PATCH] 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 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. --- gcc/gimple-lower-bitint.cc | 2 ++ gcc/testsuite/gcc.dg/bitint-79.c | 16 ++++++++++++++++ 2 files changed, 18 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/bitint-79.c diff --git a/gcc/gimple-lower-bitint.cc b/gcc/gimple-lower-bitint.cc index af167450ec0..a3802c61816 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 00000000000..e7422c06acf --- /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