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| author | Jakub Jelinek <jakub@redhat.com> | 2023-12-22 12:28:54 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2023-12-22 12:28:54 +0100 |
| commit | 0a6aa1927597d821a85bc3d1fd7682256c25b548 (patch) | |
| tree | 8c794f478b2f30677f895c4eaf5dac98036106d7 /gcc | |
| parent | f5198f0264e773d3b5d55f09a579313b0b231527 (diff) | |
| download | gcc-0a6aa1927597d821a85bc3d1fd7682256c25b548.zip gcc-0a6aa1927597d821a85bc3d1fd7682256c25b548.tar.gz gcc-0a6aa1927597d821a85bc3d1fd7682256c25b548.tar.bz2 | |
symtab-thunks: Use aggregate_value_p even on is_gimple_reg_type returns [PR112941]
Large/huge _BitInt types are returned in memory and the bitint lowering
pass right now relies on that.
The gimplification etc. use aggregate_value_p to see if it should be
returned in memory or not and use
<retval> = _123;
return <retval>;
rather than
return _123;
But expand_thunk used e.g. by IPA-ICF was performing an optimization,
assuming is_gimple_reg_type is always passed in registers and not calling
aggregate_value_p in that case. The following patch changes it to match
what the gimplification etc. are doing.
2023-12-22 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/112941
* symtab-thunks.cc (expand_thunk): Check aggregate_value_p regardless
of whether is_gimple_reg_type (restype) or not.
* gcc.dg/bitint-60.c: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/symtab-thunks.cc | 18 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/bitint-60.c | 20 |
2 files changed, 26 insertions, 12 deletions
diff --git a/gcc/symtab-thunks.cc b/gcc/symtab-thunks.cc index 23ead0d..0e5fc4f 100644 --- a/gcc/symtab-thunks.cc +++ b/gcc/symtab-thunks.cc @@ -479,21 +479,15 @@ expand_thunk (cgraph_node *node, bool output_asm_thunks, resdecl, build_int_cst (TREE_TYPE (resdecl), 0)); } - else if (!is_gimple_reg_type (restype)) + else if (aggregate_value_p (resdecl, TREE_TYPE (thunk_fndecl))) { - if (aggregate_value_p (resdecl, TREE_TYPE (thunk_fndecl))) + restmp = resdecl; + + if (VAR_P (restmp)) { - restmp = resdecl; - - if (VAR_P (restmp)) - { - add_local_decl (cfun, restmp); - BLOCK_VARS (DECL_INITIAL (current_function_decl)) - = restmp; - } + add_local_decl (cfun, restmp); + BLOCK_VARS (DECL_INITIAL (current_function_decl)) = restmp; } - else - restmp = create_tmp_var (restype, "retval"); } else restmp = create_tmp_reg (restype, "retval"); diff --git a/gcc/testsuite/gcc.dg/bitint-60.c b/gcc/testsuite/gcc.dg/bitint-60.c new file mode 100644 index 0000000..d1916a0 --- /dev/null +++ b/gcc/testsuite/gcc.dg/bitint-60.c @@ -0,0 +1,20 @@ +/* PR tree-optimization/112941 */ +/* { dg-do compile { target bitint575 } } */ +/* { dg-options "-O2 -std=c23" } */ + +unsigned _BitInt(495) f1 (signed _BitInt(381) x) { unsigned _BitInt(539) y = x; return y; } +unsigned _BitInt(495) f2 (unsigned _BitInt(381) x) { unsigned _BitInt(539) y = x; return y; } +unsigned _BitInt(495) f3 (signed _BitInt(381) x) { _BitInt(539) y = x; return y; } +unsigned _BitInt(495) f4 (unsigned _BitInt(381) x) { _BitInt(539) y = x; return y; } +_BitInt(495) f5 (signed _BitInt(381) x) { unsigned _BitInt(539) y = x; return y; } +_BitInt(495) f6 (unsigned _BitInt(381) x) { unsigned _BitInt(539) y = x; return y; } +_BitInt(495) f7 (signed _BitInt(381) x) { _BitInt(539) y = x; return y; } +_BitInt(495) f8 (unsigned _BitInt(381) x) { _BitInt(539) y = x; return y; } +unsigned _BitInt(495) f9 (signed _BitInt(381) x) { return (unsigned _BitInt(539)) x; } +unsigned _BitInt(495) f10 (unsigned _BitInt(381) x) { return (unsigned _BitInt(539)) x; } +unsigned _BitInt(495) f11 (signed _BitInt(381) x) { return (_BitInt(539)) x; } +unsigned _BitInt(495) f12 (unsigned _BitInt(381) x) { return (_BitInt(539)) x; } +_BitInt(495) f13 (signed _BitInt(381) x) { return (unsigned _BitInt(539)) x; } +_BitInt(495) f14 (unsigned _BitInt(381) x) { return (unsigned _BitInt(539)) x; } +_BitInt(495) f15 (signed _BitInt(381) x) { return (_BitInt(539)) x; } +_BitInt(495) f16 (unsigned _BitInt(381) x) { return (_BitInt(539)) x; } |