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