diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2024-03-01 11:04:51 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2024-03-01 11:04:51 +0100 |
| commit | d3d0fcb652748191714e4c0b2541e977a7fc7bd7 (patch) | |
| tree | c7b66ed76f7fc924ece16dea7daa70586bb3a3a3 | |
| parent | c6d4fb0062c6059fe21968a9fe44c56814c88873 (diff) | |
bitint: Handle VCE from large/huge _BitInt SSA_NAME from load [PR114156]
When adding checks in which case not to merge a VIEW_CONVERT_EXPR from
large/huge _BitInt to vector/complex etc., I missed the case of loads.
Those are handled differently later.
Anyway, I think the load case is something we can handle just fine,
so the following patch does that instead of preventing the merging
gimple_lower_bitint; we'd then copy from memory to memory and and do the
vce only on the second one, it is just better to vce the first one.
2024-03-01 Jakub Jelinek <jakub@redhat.com>
PR middle-end/114156
* gimple-lower-bitint.cc (bitint_large_huge::lower_stmt): Allow
rhs1 of a VCE to have no underlying variable if it is a load and
handle that case.
* gcc.dg/bitint-96.c: New test.
| -rw-r--r-- | gcc/gimple-lower-bitint.cc | 16 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/bitint-96.c | 17 |
2 files changed, 33 insertions, 0 deletions
diff --git a/gcc/gimple-lower-bitint.cc b/gcc/gimple-lower-bitint.cc index d7bf029973c..15a27126d44 100644 --- a/gcc/gimple-lower-bitint.cc +++ b/gcc/gimple-lower-bitint.cc @@ -5329,6 +5329,22 @@ bitint_large_huge::lower_stmt (gimple *stmt) gimple_assign_set_rhs1 (stmt, rhs1); gimple_assign_set_rhs_code (stmt, SSA_NAME); } + else if (m_names == NULL + || !bitmap_bit_p (m_names, SSA_NAME_VERSION (rhs1))) + { + gimple *g = SSA_NAME_DEF_STMT (rhs1); + gcc_assert (gimple_assign_load_p (g)); + tree mem = gimple_assign_rhs1 (g); + tree ltype = TREE_TYPE (lhs); + addr_space_t as = TYPE_ADDR_SPACE (TREE_TYPE (mem)); + if (as != TYPE_ADDR_SPACE (ltype)) + ltype + = build_qualified_type (ltype, + TYPE_QUALS (ltype) + | ENCODE_QUAL_ADDR_SPACE (as)); + rhs1 = build1 (VIEW_CONVERT_EXPR, ltype, mem); + gimple_assign_set_rhs1 (stmt, rhs1); + } else { int part = var_to_partition (m_map, rhs1); diff --git a/gcc/testsuite/gcc.dg/bitint-96.c b/gcc/testsuite/gcc.dg/bitint-96.c new file mode 100644 index 00000000000..237eb47a9f9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/bitint-96.c @@ -0,0 +1,17 @@ +/* PR middle-end/114156 */ +/* { dg-do compile { target bitint } } */ +/* { dg-options "-O2" } */ +/* { dg-additional-options "-msse2" { target i?86-*-* x86_64-*-* } } */ + +#if __BITINT_MAXWIDTH__ >= 128 +_BitInt(128) a, b; +#else +int a, b; +#endif + +void +foo (void) +{ + int u = b; + __builtin_memmove (&a, &b, sizeof (a)); +} |