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Subject: [Bug target/55301] New: [SH] broken sp_switch function attribute
Date: Tue, 13 Nov 2012 00:07:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55301

             Bug #: 55301
           Summary: [SH] broken sp_switch function attribute
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: olegendo@gcc.gnu.org
            Target: sh*-*-*


The example from the sp_switch function attribute documentation:

void* alt_stack;

void f (void) __attribute__ ((interrupt_handler, sp_switch ("alt_stack")));

void f (void)
{
}

results in

sh_tmp.cpp: In function 'void f()':
sh_tmp.cpp:9:1: error: unrecognizable insn:
(insn 8 3 9 2 (parallel [
            (const_int 1 [0x1])
            (mem/u/c:SI (label_ref 0) [0 S4 A32])
        ]) sh_tmp.cpp:8 -1
     (nil))
sh_tmp.cpp:9:1: internal compiler error: in extract_insn, at recog.c:2109

This happens on 4.8, 4.7 branch and 4.6 branch.