procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

re PR middle-end/45416 (Code size regression from 4.4 for ARM)

Browse source 
2011-12-07  Andrew Pinski  <apinski@cavium.com>

	PR middle-end/45416
	* expr.c (do_store_flag): Rewrite code that looks for BIT_AND_EXPR for
	SSA-expand.

2011-12-07  Andrew Pinski  <apinski@cavium.com>

	PR middle-end/45416
	* gcc.dg/pr45416.c: New testcase.

From-SVN: r182084
This commit is contained in:
Andrew Pinski 2011-12-07 19:23:10 +00:00 • committed by Andrew Pinski
parent 7cdd2e6c6e
commit 3c411f3f2c
4 changed files with 39 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2011-12-07 Andrew Pinski <apinski@cavium.com>
PR middle-end/45416
* expr.c (do_store_flag): Rewrite code that looks for BIT_AND_EXPR for
SSA-expand.
2011-12-07 Richard Guenther <rguenther@suse.de>
PR tree-optimization/50823

21
gcc/expr.c
View file

@ -10563,15 +10563,22 @@ do_store_flag (sepops ops, rtx target, enum machine_mode mode)
so we just call into the folder and expand its result. */
if ((code == NE || code == EQ)
&& TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1)
&& integer_pow2p (TREE_OPERAND (arg0, 1))
&& integer_zerop (arg1)
&& (TYPE_PRECISION (ops->type) != 1 || TYPE_UNSIGNED (ops->type)))
{
tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
return expand_expr (fold_single_bit_test (loc,
code == NE ? NE_EXPR : EQ_EXPR,
arg0, arg1, type),
target, VOIDmode, EXPAND_NORMAL);
gimple srcstmt = get_def_for_expr (arg0, BIT_AND_EXPR);
if (srcstmt
&& integer_pow2p (gimple_assign_rhs2 (srcstmt)))
{
enum tree_code tcode = code == NE ? NE_EXPR : EQ_EXPR;
tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
tree temp = fold_build2_loc (loc, BIT_AND_EXPR, TREE_TYPE (arg1),
gimple_assign_rhs1 (srcstmt),
gimple_assign_rhs2 (srcstmt));
temp = fold_single_bit_test (loc, tcode, temp, arg1, type);
if (temp)
return expand_expr (temp, target, VOIDmode, EXPAND_NORMAL);
}
}
if (! get_subtarget (target)

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2011-12-07 Andrew Pinski <apinski@cavium.com>
PR middle-end/45416
* gcc.dg/pr45416.c: New testcase.
2011-12-07 Ed Smith-Rowland <3dw4rd@verizon.net>
PR c++/51420

14
gcc/testsuite/gcc.dg/pr45416.c Normal file
View file

@ -0,0 +1,14 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
int foo(long long a)
{
if (a & (long long) 0x400)
return 1;
return 0;
}
/* { dg-final { scan-assembler "andl" { target i?86-*-linux* x86_64-*-linux* } } } " */
/* { dg-final { scan-assembler-not "setne" { target i?86-*-linux* x86_64-*-linux* } } }" */
/* { dg-final { scan-assembler "and" { target arm*-*-* } } }" */
/* { dg-final { scan-assembler-not "moveq" { target arm*-*-* } } }" */