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2017-10-31 Segher Boessenkool <segher@kernel.crsahing.org>
PR target/82674
* config/rs6000/rs6000.md (allocate_stack): Force update interval
into a register if it does not fit into an immediate offset field.
diff -Nrup a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
--- a/gcc/config/rs6000/rs6000.md 2017-11-06 09:12:21.128237467 -0700
+++ b/gcc/config/rs6000/rs6000.md 2017-11-06 09:13:40.521601373 -0700
@@ -11886,6 +11886,9 @@
{
rtx loop_lab, end_loop;
bool rotated = CONST_INT_P (rounded_size);
+ rtx update = GEN_INT (-probe_interval);
+ if (probe_interval > 32768)
+ update = force_reg (Pmode, update);
emit_stack_clash_protection_probe_loop_start (&loop_lab, &end_loop,
last_addr, rotated);
@@ -11893,13 +11896,11 @@
if (Pmode == SImode)
emit_insn (gen_movsi_update_stack (stack_pointer_rtx,
stack_pointer_rtx,
- GEN_INT (-probe_interval),
- chain));
+ update, chain));
else
emit_insn (gen_movdi_di_update_stack (stack_pointer_rtx,
stack_pointer_rtx,
- GEN_INT (-probe_interval),
- chain));
+ update, chain));
emit_stack_clash_protection_probe_loop_end (loop_lab, end_loop,
last_addr, rotated);
}
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