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tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): Return true for non-addressable GIMPLE operands. 

* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p) <VIEW_CONVERT_EXPR>:
	Return true for non-addressable GIMPLE operands.

From-SVN: r140941
This commit is contained in:
Eric Botcazou 2008-10-07 17:27:23 +00:00 committed by Eric Botcazou
parent d208e2d242
commit cf9322ca65
6 changed files with 46 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-10-07 Eric Botcazou <ebotcazou@adacore.com>
* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p) <VIEW_CONVERT_EXPR>:
Return true for non-addressable GIMPLE operands.
2008-10-07 H.J. Lu <hongjiu.lu@intel.com>
PR target/24765

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2008-10-07 Eric Botcazou <ebotcazou@adacore.com>
* gnat.dg/loop_optimization4.adb: New test.
* gnat.dg/loop_optimization4_pkg.ad[sb]: New helper.
2008-10-07 Bob Wilson <bob.wilson@acm.org>
* gcc.dg/compat/struct-layout-1_generate.c (dg_options): New. Moved

9
gcc/testsuite/gnat.dg/loop_optimization4.adb Normal file
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@ -0,0 +1,9 @@
-- { dg-do run }
-- { dg-options "-O2" }
with Loop_Optimization4_Pkg; use Loop_Optimization4_Pkg;
procedure Loop_Optimization4 is
begin
Add ("Nothing");
end;

17
gcc/testsuite/gnat.dg/loop_optimization4_pkg.adb Normal file
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@ -0,0 +1,17 @@
package body Loop_Optimization4_Pkg is
procedure Add (Phrase : String) is
begin
if Debug_Buffer_Len = Max_Debug_Buffer_Len then
return;
end if;
for I in Phrase'Range loop
Debug_Buffer_Len := Debug_Buffer_Len + 1;
Debug_Buffer (Debug_Buffer_Len) := Phrase (I);
if Debug_Buffer_Len = Max_Debug_Buffer_Len then
exit;
end if;
end loop;
end Add;
end Loop_Optimization4_Pkg;

9
gcc/testsuite/gnat.dg/loop_optimization4_pkg.ads Normal file
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@ -0,0 +1,9 @@
package Loop_Optimization4_Pkg is
Max_Debug_Buffer_Len : Natural := 8 * 1024;
Debug_Buffer : String (1 .. Max_Debug_Buffer_Len);
Debug_Buffer_Len : Natural range 0 .. Max_Debug_Buffer_Len;
procedure Add (Phrase : String);
end Loop_Optimization4_Pkg;

2
gcc/tree-ssa-loop-ivopts.c
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@ -1558,7 +1558,7 @@ may_be_nonaddressable_p (tree expr)
non-addressability may be uncovered again, causing ADDR_EXPRs
of inappropriate objects to be built. */
if (is_gimple_reg (TREE_OPERAND (expr, 0))
|| is_gimple_min_invariant (TREE_OPERAND (expr, 0)))
|| !is_gimple_addressable (TREE_OPERAND (expr, 0)))
return true;
/* ... fall through ... */