[m-rev.] for review: implicit option for target x86-64

[Fransiska Nathania HANDOKO]

Estimated hours taken: 1

This change adds few lines of codes to handle options when compiling
to x86_64 assembler.

compiler/handle_options.m:
 	Add codes to set an implicit option when compiling to x86_64
 	assembler. The option is 'use_local_vars'. The default for
 	this is 'no'.


Index: compiler/handle_options.m
===================================================================
RCS file: 
/home/mercury/mercury1/repository/mercury/compiler/handle_options.m,v
retrieving revision 1.291
diff -u -r1.291 handle_options.m
--- compiler/handle_options.m   8 Jan 2007 03:03:09 -0000   1.291
+++ compiler/handle_options.m   9 Jan 2007 04:05:56 -0000
@@ -654,6 +654,19 @@
              true
          ),

+        % Generating x86_64 assembler implies '--no-use-local-vars'
+        (
+            Target = target_x86_64,
+            globals.set_option(use_local_vars, bool(no), !Globals)
+
+        ;
+            ( Target = target_asm
+            ; Target = target_c
+            ; Target = target_il
+            ; Target = target_java
+            )
+        ),
+
          %
          % Set up options for position independent code.
          %

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