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From df5201a35d02a13ad7ffd6fb38252851910cae43 Mon Sep 17 00:00:00 2001
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From: "Richard W.M. Jones" <rjones@redhat.com>
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Date: Fri, 24 Oct 2014 10:10:54 +0100
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Subject: [PATCH 15/18] ppc64/ppc64le: proc: Interim definitions for op_is_pure
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and regs_are_volatile.
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See: https://bugzilla.redhat.com/show_bug.cgi?id=1156300
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These are based somewhat on guesswork and need to be checked by
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someone more familiar with the compiler and POWER architecture.
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---
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asmcomp/power64/proc.ml | 15 +++++++++++++++
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asmcomp/power64le/proc.ml | 15 +++++++++++++++
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2 files changed, 30 insertions(+)
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diff --git a/asmcomp/power64/proc.ml b/asmcomp/power64/proc.ml
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index a5a35f3..c377f69 100644
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--- a/asmcomp/power64/proc.ml
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+++ b/asmcomp/power64/proc.ml
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@@ -202,6 +202,10 @@ let loc_external_results res =
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let loc_exn_bucket = phys_reg 0
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+(* Volatile registers: none *)
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+
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+let regs_are_volatile rs = false
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+
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(* Registers destroyed by operations *)
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let destroyed_at_c_call =
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@@ -226,6 +230,17 @@ let max_register_pressure = function
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Iextcall(_, _) -> [| 15; 18 |]
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| _ -> [| 23; 30 |]
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+(* Pure operations (without any side effect besides updating their result
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+ registers). *)
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+
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+let op_is_pure = function
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+ | Icall_ind | Icall_imm _ | Itailcall_ind | Itailcall_imm _
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+ | Iextcall _ | Istackoffset _ | Istore _ | Ialloc _
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+ | Iintop(Icheckbound) | Iintop_imm(Icheckbound, _) -> false
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+ | Ispecific(Imultaddf | Imultsubf) -> true
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+ | Ispecific _ -> false
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+ | _ -> true
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+
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(* Layout of the stack *)
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let num_stack_slots = [| 0; 0 |]
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diff --git a/asmcomp/power64le/proc.ml b/asmcomp/power64le/proc.ml
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index 476c984..56473ac 100644
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--- a/asmcomp/power64le/proc.ml
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+++ b/asmcomp/power64le/proc.ml
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@@ -202,6 +202,10 @@ let loc_external_results res =
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let loc_exn_bucket = phys_reg 0
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+(* Volatile registers: none *)
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+
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+let regs_are_volatile rs = false
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+
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(* Registers destroyed by operations *)
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let destroyed_at_c_call =
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@@ -226,6 +230,17 @@ let max_register_pressure = function
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Iextcall(_, _) -> [| 15; 18 |]
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| _ -> [| 23; 30 |]
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+(* Pure operations (without any side effect besides updating their result
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+ registers). *)
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+
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+let op_is_pure = function
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+ | Icall_ind | Icall_imm _ | Itailcall_ind | Itailcall_imm _
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+ | Iextcall _ | Istackoffset _ | Istore _ | Ialloc _
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+ | Iintop(Icheckbound) | Iintop_imm(Icheckbound, _) -> false
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+ | Ispecific(Imultaddf | Imultsubf) -> true
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+ | Ispecific _ -> false
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+ | _ -> true
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+
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(* Layout of the stack *)
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let num_stack_slots = [| 0; 0 |]
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--
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2.3.1
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