| Message ID | 5270E650.2060007@arm.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 212a4bc..23dfc0e 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -26547,6 +26547,7 @@ arm_expand_epilogue_apcs_frame (bool really_return) num_regs = bit_count (saved_regs_mask); if ((offsets->outgoing_args != (1 + num_regs)) || cfun->calls_alloca) { + emit_insn (gen_blockage ()); /* Unwind the stack to just below the saved registers. */ emit_insn (gen_addsi3 (stack_pointer_rtx, hard_frame_pointer_rtx,
PR58854 is another manifestation of the usual issue with the scheduler not understanding sp fp overlap issues and hoisting such adjustments (see PR38644 for a long history on an earlier one) over accesses from the frame. The usual bodge in the backend is attached. Tested arm-none-eabi cross - tested that the testcase works just fine. Applied to trunk and will backport to the 4.8 branch in a day or so after the auto-testers have had a chance to play with this. regards Ramana 2013-10-30 Ramana Radhakrishnan <ramana.radhakrishnan@arm.com> PR target/58854 * config/arm/arm.c (arm_expand_epilogue_apcs_frame): Emit blockage.