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| author | Jakub Jelinek <jakub@redhat.com> | 2023-11-23 12:59:54 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2023-11-23 12:59:54 +0100 |
| commit | f9982ef4f55bd3a63745e03ac6d68b4a92fa8bce (patch) | |
| tree | d79e2b030cbe130d2fcacfb75ceb784755338eca | |
| parent | 97ddebb6b4f6b132b0a8072b26d030077b418963 (diff) | |
| download | gcc-f9982ef4f55bd3a63745e03ac6d68b4a92fa8bce.zip gcc-f9982ef4f55bd3a63745e03ac6d68b4a92fa8bce.tar.gz gcc-f9982ef4f55bd3a63745e03ac6d68b4a92fa8bce.tar.bz2 | |
expr: Fix &bitint_var handling in initializers [PR112336]
As the following testcase shows, we ICE when trying to emit ADDR_EXPR of
a bitint variable which doesn't have mode width.
The problem is in the EXTEND_BITINT stuff which makes sure we treat the
padding bits on memory reads from user bitint vars as undefined.
When expanding ADDR_EXPR on such vars inside outside of initializers,
expand_expr_addr* uses EXPAND_CONST_ADDRESS modifier and EXTEND_BITINT
does nothing, but in initializers it keeps using EXPAND_INITIALIZER
modifier. So, we need to treat EXPAND_INITIALIZER the same as
EXPAND_CONST_ADDRESS for this regard.
2023-11-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/112336
* expr.cc (EXTEND_BITINT): Don't call reduce_to_bit_field_precision
if modifier is EXPAND_INITIALIZER.
* gcc.dg/bitint-41.c: New test.
| -rw-r--r-- | gcc/expr.cc | 1 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/bitint-41.c | 36 |
2 files changed, 37 insertions, 0 deletions
diff --git a/gcc/expr.cc b/gcc/expr.cc index 556bcf7..d932067 100644 --- a/gcc/expr.cc +++ b/gcc/expr.cc @@ -10698,6 +10698,7 @@ expand_expr_real_1 (tree exp, rtx target, machine_mode tmode, && mode != BLKmode \ && modifier != EXPAND_MEMORY \ && modifier != EXPAND_WRITE \ + && modifier != EXPAND_INITIALIZER \ && modifier != EXPAND_CONST_ADDRESS) \ ? reduce_to_bit_field_precision ((expr), NULL_RTX, type) : (expr)) diff --git a/gcc/testsuite/gcc.dg/bitint-41.c b/gcc/testsuite/gcc.dg/bitint-41.c new file mode 100644 index 0000000..d87ea08 --- /dev/null +++ b/gcc/testsuite/gcc.dg/bitint-41.c @@ -0,0 +1,36 @@ +/* PR middle-end/112336 */ +/* { dg-do compile { target bitint } } */ +/* { dg-options "-std=c2x" } */ + +unsigned _BitInt(1) v1; +unsigned _BitInt(1) *p1 = &v1; +signed _BitInt(2) v2; +signed _BitInt(2) *p2 = &v2; +unsigned _BitInt(11) v11; +unsigned _BitInt(11) *p11 = &v11; +signed _BitInt(12) v12; +signed _BitInt(12) *p12 = &v12; +unsigned _BitInt(21) v21; +unsigned _BitInt(21) *p21 = &v21; +signed _BitInt(22) v22; +signed _BitInt(22) *p22 = &v22; +unsigned _BitInt(31) v31; +unsigned _BitInt(31) *p31 = &v31; +signed _BitInt(32) v32; +signed _BitInt(32) *p32 = &v32; +unsigned _BitInt(41) v41; +unsigned _BitInt(41) *p41 = &v41; +signed _BitInt(42) v42; +signed _BitInt(42) *p42 = &v42; +#if __BITINT_MAXWIDTH__ >= 128 +unsigned _BitInt(127) v127; +unsigned _BitInt(127) *p127 = &v127; +signed _BitInt(128) v128; +signed _BitInt(128) *p128 = &v128; +#endif +#if __BITINT_MAXWIDTH__ >= 258 +unsigned _BitInt(257) v257; +unsigned _BitInt(257) *p257 = &v257; +signed _BitInt(258) v258; +signed _BitInt(258) *p258 = &v258; +#endif |