From 1423c90a66984595686b339775b9bfcf2751d376 Mon Sep 17 00:00:00 2001
From: ian <ian@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 18 Jan 2018 04:24:48 +0000
Subject: [PATCH] 	PR go/83787     compiler: pass int to makechan, call
 makechan64 when appropriate

    The update to 1.10beta1 changed makechan to take int instead of int64,
    and added a makechan64 call for large values.  Since the size is the
    last argument to makechan, the old compiler which always passed a
    64-bit int worked fine on 64-bit systems and little-endian 32-bit
    systems, but broke on big-endian 32-bit systems.  This CL fixes the
    compiler to use the appropriate types.

    This fixes GCC PR 83787.

    Reviewed-on: https://go-review.googlesource.com/88077


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@256835 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/go/gofrontend/MERGE          | 2 +-
 gcc/go/gofrontend/escape.cc      | 4 ++++
 gcc/go/gofrontend/expressions.cc | 5 ++++-
 gcc/go/gofrontend/runtime.def    | 3 ++-
 libgo/go/runtime/chan.go         | 1 +
 5 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index e7b959f850e..93e7215271e 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-1072286ca9249bd6f75628aead325a66286bcf5b
+925635f067d40d30acf565b620cc859ee7cbc990
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/escape.cc b/gcc/go/gofrontend/escape.cc
index 7bab3cbdd4a..4f95945e230 100644
--- a/gcc/go/gofrontend/escape.cc
+++ b/gcc/go/gofrontend/escape.cc
@@ -360,6 +360,7 @@ Node::op_format() const
 		  break;
 
 		case Runtime::MAKECHAN:
+		case Runtime::MAKECHAN64:
 		case Runtime::MAKEMAP:
 		case Runtime::MAKESLICE:
 		case Runtime::MAKESLICE64:
@@ -1602,6 +1603,7 @@ Escape_analysis_assign::expression(Expression** pexpr)
 	    switch (fe->runtime_code())
 	      {
 	      case Runtime::MAKECHAN:
+	      case Runtime::MAKECHAN64:
 	      case Runtime::MAKEMAP:
 	      case Runtime::MAKESLICE:
 	      case Runtime::MAKESLICE64:
@@ -2284,6 +2286,7 @@ Escape_analysis_assign::assign(Node* dst, Node* src)
 		switch (fe->runtime_code())
 		  {
 		  case Runtime::MAKECHAN:
+		  case Runtime::MAKECHAN64:
 		  case Runtime::MAKEMAP:
 		  case Runtime::MAKESLICE:
 		  case Runtime::MAKESLICE64:
@@ -3056,6 +3059,7 @@ Escape_analysis_flood::flood(Level level, Node* dst, Node* src,
               switch (call->fn()->func_expression()->runtime_code())
                 {
                 case Runtime::MAKECHAN:
+		case Runtime::MAKECHAN64:
                 case Runtime::MAKEMAP:
                 case Runtime::MAKESLICE:
                 case Runtime::MAKESLICE64:
diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index 99fb1b59ade..47be82f823e 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -7565,7 +7565,10 @@ Builtin_call_expression::lower_make(Statement_inserter* inserter)
   else if (is_chan)
     {
       Expression* type_arg = Expression::make_type_descriptor(type, type_loc);
-      call = Runtime::make_call(Runtime::MAKECHAN, loc, 2, type_arg, len_arg);
+      Runtime::Function code = Runtime::MAKECHAN;
+      if (!len_small)
+	code = Runtime::MAKECHAN64;
+      call = Runtime::make_call(code, loc, 2, type_arg, len_arg);
     }
   else
     go_unreachable();
diff --git a/gcc/go/gofrontend/runtime.def b/gcc/go/gofrontend/runtime.def
index 605bcff4a0f..fdb159e5505 100644
--- a/gcc/go/gofrontend/runtime.def
+++ b/gcc/go/gofrontend/runtime.def
@@ -139,7 +139,8 @@ DEF_GO_RUNTIME(MAPITERNEXT, "runtime.mapiternext", P1(POINTER), R0())
 
 
 // Make a channel.
-DEF_GO_RUNTIME(MAKECHAN, "runtime.makechan", P2(TYPE, INT64), R1(CHAN))
+DEF_GO_RUNTIME(MAKECHAN, "runtime.makechan", P2(TYPE, INT), R1(CHAN))
+DEF_GO_RUNTIME(MAKECHAN64, "runtime.makechan64", P2(TYPE, INT64), R1(CHAN))
 
 // Send a value on a channel.
 DEF_GO_RUNTIME(CHANSEND, "runtime.chansend1", P2(CHAN, POINTER), R0())
diff --git a/libgo/go/runtime/chan.go b/libgo/go/runtime/chan.go
index 8db728d5430..bf708aec5c4 100644
--- a/libgo/go/runtime/chan.go
+++ b/libgo/go/runtime/chan.go
@@ -26,6 +26,7 @@ import (
 // themselves, so that the compiler will export them.
 //
 //go:linkname makechan runtime.makechan
+//go:linkname makechan64 runtime.makechan64
 //go:linkname chansend1 runtime.chansend1
 //go:linkname chanrecv1 runtime.chanrecv1
 //go:linkname chanrecv2 runtime.chanrecv2
-- 
2.11.4.GIT