[Bug rtl-optimization/78241] New: [7 Regression] wrong code with -funroll-loops
zsojka at seznam dot cz
gcc-bugzilla@gcc.gnu.org
Mon Nov 7 20:10:00 GMT 2016
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78241
Bug ID: 78241
Summary: [7 Regression] wrong code with -funroll-loops
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Created attachment 39983
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39983&action=edit
reduced testcase
Output:
$ x86_64-pc-linux-gnu-gcc -Og -funroll-loops testcase.c
$ ./a.out
Aborted
Correct value is 0xffffffff, wrong value is 16.
Tested targets that fail in 7.0.0:
aarch64-unknown-linux-gnu
armv7a-hardfloat-linux-gnueabi
armv7a-softfp-linux-gnueabi
powerpc64le-unknown-linux-gnu
powerpc64-unknown-linux-gnu
sparc-unknown-linux-gnu
x86_64-pc-linux-gnu
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