http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54963
Bug #: 54963
Summary: Wrong code generated for
libgfortran/generated/eoshift3_8.c on SH
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: [email protected]
ReportedBy: [email protected]
Target: sh*-*-*
Created attachment 28469
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28469
A test case
Several fortran tests using some eoshift functions fail on
sh4-unknown-linux-gnu for a while. The above test case is
a reduced one which fails sh-elf with -O2 -ml -m4. The right
result would be "adhbeh..." but it wrongly returns "ticzzz...".
It seems that the compiler allocates a stack slot at r15+60
for "len" variable first for the line 126:
len = ((array)->dim[dim]._ubound + 1 - (array)->dim[dim].lower_bound);
then computes len - abs (sh) for the line 184;
for (n = 0; n < len - delta; n++)
using "len" variable at r15+68. The error went away with
-fno-ira-share-spill-slots.
