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Warn on type punning that toggles scalar storage order
authorEric Botcazou <ebotcazou@adacore.com>
Wed, 26 May 2021 17:12:05 +0000 (19:12 +0200)
committerEric Botcazou <ebotcazou@adacore.com>
Wed, 26 May 2021 17:13:56 +0000 (19:13 +0200)
commit401bd4adcfda9965363b1ac3ba7e1580f15d6883
treec71b1e857c1b29bbf42ae593ede1de9fa560e61atree
parent0e1fd432e9cd5a2a4703c9ef9cc61255ea22cc49commit | diff
Warn on type punning that toggles scalar storage order

As documented in the manual, we do not support type punning that toggles
the scalar storage order, so this adds a warning for the case of unions.

gcc/c/
PR c/100653
* c-decl.c (finish_struct): Warn for a union containing an aggregate
field with a differing scalar storage order.
gcc/testsuite/
* gcc.dg/sso-13.c: New test.
gcc/c/c-decl.c diff | blob | blame | history
gcc/testsuite/gcc.dg/sso-13.c [new file with mode: 0644] blob
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