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* [gcc r14-8184] lower-bitint: Fix up VIEW_CONVERT_EXPR handling [PR113408]
@ 2024-01-17 12:57 Jakub Jelinek
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From: Jakub Jelinek @ 2024-01-17 12:57 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:2fb78d431ff3c05997ef31837d6eb319d84a4239
commit r14-8184-g2fb78d431ff3c05997ef31837d6eb319d84a4239
Author: Jakub Jelinek <jakub@redhat.com>
Date: Wed Jan 17 13:55:50 2024 +0100
lower-bitint: Fix up VIEW_CONVERT_EXPR handling [PR113408]
Unlike NOP_EXPR/CONVERT_EXPR which are GIMPLE_UNARY_RHS, VIEW_CONVERT_EXPR
is GIMPLE_SINGLE_RHS and so gimple_assign_rhs1 contains the operand wrapped
in VIEW_CONVERT_EXPR tree.
So, to handle it like other casts we need to look through it.
2024-01-17 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/113408
* gimple-lower-bitint.cc (bitint_large_huge::handle_stmt): For
VIEW_CONVERT_EXPR, pass TREE_OPERAND (rhs1, 0) rather than rhs1
to handle_cast.
* gcc.dg/bitint-71.c: New test.
Diff:
---
gcc/gimple-lower-bitint.cc | 5 ++++-
gcc/testsuite/gcc.dg/bitint-71.c | 18 ++++++++++++++++++
2 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/gcc/gimple-lower-bitint.cc b/gcc/gimple-lower-bitint.cc
index 672a9a33751..d3d113578d9 100644
--- a/gcc/gimple-lower-bitint.cc
+++ b/gcc/gimple-lower-bitint.cc
@@ -1975,9 +1975,12 @@ bitint_large_huge::handle_stmt (gimple *stmt, tree idx)
case INTEGER_CST:
return handle_operand (gimple_assign_rhs1 (stmt), idx);
CASE_CONVERT:
- case VIEW_CONVERT_EXPR:
return handle_cast (TREE_TYPE (gimple_assign_lhs (stmt)),
gimple_assign_rhs1 (stmt), idx);
+ case VIEW_CONVERT_EXPR:
+ return handle_cast (TREE_TYPE (gimple_assign_lhs (stmt)),
+ TREE_OPERAND (gimple_assign_rhs1 (stmt), 0),
+ idx);
default:
break;
}
diff --git a/gcc/testsuite/gcc.dg/bitint-71.c b/gcc/testsuite/gcc.dg/bitint-71.c
new file mode 100644
index 00000000000..f7ff8716f36
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/bitint-71.c
@@ -0,0 +1,18 @@
+/* PR tree-optimization/113408 */
+/* { dg-do compile { target bitint } } */
+/* { dg-options "-std=c23 -O2" } */
+
+#if __BITINT_MAXWIDTH__ >= 713
+struct A { _BitInt(713) b; } g;
+#else
+struct A { _BitInt(49) b; } g;
+#endif
+int f;
+
+void
+foo (void)
+{
+ struct A j = g;
+ if (j.b)
+ f = 0;
+}
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