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| author | Claudiu Zissulescu <claziss@synopsys.com> | 2017-03-27 12:56:04 +0200 |
|---|---|---|
| committer | Claudiu Zissulescu <claziss@gcc.gnu.org> | 2017-03-27 12:56:04 +0200 |
| commit | 84804c5b47636c7fa8bbbd1481ed426f2efc2654 (patch) | |
| tree | 98fbcc94f6f8c9ff7f65db94999708007e2de327 /gcc/config/arc/arc.c | |
| parent | c5e5f5f6429b05b47110f8dea839ec055d69bb4f (diff) | |
| download | gcc-84804c5b47636c7fa8bbbd1481ed426f2efc2654.zip gcc-84804c5b47636c7fa8bbbd1481ed426f2efc2654.tar.gz gcc-84804c5b47636c7fa8bbbd1481ed426f2efc2654.tar.bz2 | |
[ARC] Save/restore blink when in ISR.
gcc/
2017-03-27 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.c (arc_epilogue_uses): BLINK should be also
restored when in interrupt.
* config/arc/arc.md (simple_return): ARCv2 rtie instruction
doesn't have delay slot.
2017-03-27 Claudiu Zissulescu <claziss@synopsys.com>
* testsuite/gcc.target/arc/interrupt-4.c: New file.
From-SVN: r246495
Diffstat (limited to 'gcc/config/arc/arc.c')
| -rw-r--r-- | gcc/config/arc/arc.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c index 1116b2d..0563a74 100644 --- a/gcc/config/arc/arc.c +++ b/gcc/config/arc/arc.c @@ -9381,9 +9381,10 @@ arc_can_follow_jump (const rtx_insn *follower, const rtx_insn *followee) Return true if REGNO should be added to the deemed uses of the epilogue. We use the return address - arc_return_address_regs[arc_compute_function_type (cfun)] . - But also, we have to make sure all the register restore instructions - are known to be live in interrupt functions. */ + arc_return_address_regs[arc_compute_function_type (cfun)]. But + also, we have to make sure all the register restore instructions + are known to be live in interrupt functions, plus the blink + register if it is clobbered by the isr. */ bool arc_epilogue_uses (int regno) @@ -9396,7 +9397,8 @@ arc_epilogue_uses (int regno) { if (!fixed_regs[regno]) return true; - return regno == arc_return_address_regs[cfun->machine->fn_type]; + return ((regno == arc_return_address_regs[cfun->machine->fn_type]) + || (regno == RETURN_ADDR_REGNUM)); } else return regno == RETURN_ADDR_REGNUM; |