Tiny C Compiler - Bugs: bug #63895, TCC: Wrong initialization of an...

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bug #63895: TCC: Wrong initialization of an array, when the struct includes another struct with some bitfields (#yarpgen v1)

Submitter:	Detlef Riekenberg <wine_dev>
Submitted:	Wed 08 Mar 2023 04:23:31 PM UTC


Category:	None	Severity:	3 - Normal
Item Group:	None	Status:	None
Privacy:	Public	Assigned to:	None
Open/Closed:	Open

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Wed 15 Mar 2023 07:28:40 PM UTC, comment #1:

This bug and the following detected bugs
are all fixed in the current mob branch.

Thanks for everyone improving tcc to get the testcases
from yarpgen (v1) working with tcc.

--
Regards ... Detlef

Detlef Riekenberg <wine_dev>

Wed 08 Mar 2023 04:23:31 PM UTC, original submission:

There are still bugs in tcc for testcodes generated by yarpgen v1.

Attached is a stripped down result of yarpgen (v1) with a seed of 84.

The initialization of an array of struct tf_3_struct_2 items fails with tcc.
Some items in struct tf_3_struct_2 are of the type tf_3_struct_1.

tcc fails always to correctly initialize the member_1_3 in every tf_3_struct_1.

Some members of struct tf_3_struct_1 are bitfields, but not the failing item "member_1_3".
I have no idea, if the buggy initialization is related to the bitfields.

driver.c is the stripped buggy file, filled with a big bunch of printf().

diff-O0 calls the reference compiler (ref-O0.sh: I use gcc)
and the test compiler (tst-O0.sh: tcc) and displays a diff
of the saved output from running the created binaries

--
Regards ... Detlef

Detlef Riekenberg <wine_dev>

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file #54465: 00084_mod.tar.gz added by wine_dev (12KiB - application/gzip)

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Date	Changed by	Updated Field	Previous Value	=>	Replaced by
2023-03-08	wine_dev	Attached File	-		Added 00084_mod.tar.gz, #54465

Tiny C Compiler - Bugs: bug #63895, TCC: Wrong initialization of an...

bug #63895: TCC: Wrong initialization of an array, when the struct includes another struct with some bitfields (#yarpgen v1)

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