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arm.md (andsi3): Change to zero extension if possible. 

* config/arm/arm.md (andsi3): Change to zero extension if possible.

	* config/arm/thumb2.md (thumb2_zero_extendqisi2_v6): Change the name.

	* gcc.target/arm/pr44999.c: New testcase.

From-SVN: r163184
This commit is contained in:
Wei Guozhi 2010-08-12 02:03:59 +00:00 committed by Wei Guozhi
parent 835e673451
commit 3565ffedc8
5 changed files with 32 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-08-12 Wei Guozhi <carrot@google.com>
PR target/44999
* config/arm/arm.md (andsi3): Change to zero extension if possible.
* config/arm/thumb2.md (thumb2_zero_extendqisi2_v6): Change the name.
2010-08-11 Vladimir Makarov <vmakarov@redhat.com>
* ira-int.h (ira_remove_allocno_copy_from_list): Remove.

14
gcc/config/arm/arm.md
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@ -1937,9 +1937,17 @@
{
if (GET_CODE (operands[2]) == CONST_INT)
{
arm_split_constant (AND, SImode, NULL_RTX,
INTVAL (operands[2]), operands[0],
operands[1], optimize && can_create_pseudo_p ());
if (INTVAL (operands[2]) == 255 && arm_arch6)
{
operands[1] = convert_to_mode (QImode, operands[1], 1);
emit_insn (gen_thumb2_zero_extendqisi2_v6 (operands[0],
operands[1]));
}
else
arm_split_constant (AND, SImode, NULL_RTX,
INTVAL (operands[2]), operands[0],
operands[1],
optimize && can_create_pseudo_p ());
DONE;
}

2
gcc/config/arm/thumb2.md
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@ -907,7 +907,7 @@
(set_attr "neg_pool_range" "*,250")]
)
(define_insn "*thumb2_zero_extendqisi2_v6"
(define_insn "thumb2_zero_extendqisi2_v6"
[(set (match_operand:SI 0 "s_register_operand" "=r,r")
(zero_extend:SI (match_operand:QI 1 "nonimmediate_operand" "r,m")))]
"TARGET_THUMB2 && arm_arch6"

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-08-12 Wei Guozhi <carrot@google.com>
PR target/44999
* gcc.target/arm/pr44999.c: New testcase.
2010-08-12 Jie Zhang <jie@codesourcery.com>
* gcc.dg/graphite/interchange-9.c (M): Define to be 111.

9
gcc/testsuite/gcc.target/arm/pr44999.c Normal file
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@ -0,0 +1,9 @@
/* Use UXTB to extract the lowest byte. */
/* { dg-options "-mthumb -Os" } */
/* { dg-require-effective-target arm_thumb2_ok } */
/* { dg-final { scan-assembler "uxtb" } } */
int tp(int x, int y)
{
return (x & 0xff) - (y & 0xffff);
}