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(expand_decl): Don't set RTX_UNCHANGING_P.

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From-SVN: r4457
This commit is contained in:
Richard Stallman 1993-05-14 19:00:45 +00:00
parent 517f954609
commit b4bf13a89e
1 changed files with 7 additions and 0 deletions
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7
gcc/stmt.c
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@ -2995,8 +2995,15 @@ expand_decl (decl)
if (TREE_THIS_VOLATILE (decl))
MEM_VOLATILE_P (DECL_RTL (decl)) = 1;
#if 0 /* A variable is not necessarily unchanging
just because it is const. RTX_UNCHANGING_P
means no change in the function,
not merely no change in the variable's scope.
It is correct to set RTX_UNCHANGING_P if the variable's scope
is the whole function. There's no convenient way to test that. */
if (TREE_READONLY (decl))
RTX_UNCHANGING_P (DECL_RTL (decl)) = 1;
#endif
/* If doing stupid register allocation, make sure life of any
register variable starts here, at the start of its scope. */