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re PR target/49281 (lea_general_4 is wrong)

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PR target/49281
	* config/i386/i386.md (*lea_general_4): Require INTVAL (operands[3])
	to be strictly smaller than 1 << shiftcount.

	* gcc.c-torture/execute/pr49281.c: New test.

From-SVN: r174641
This commit is contained in:
Jakub Jelinek 2011-06-04 17:38:36 +02:00 committed by Jakub Jelinek
parent 0defd78663
commit 407bcba7b7
4 changed files with 37 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2011-06-04 Jakub Jelinek <jakub@redhat.com>
PR target/49281
* config/i386/i386.md (*lea_general_4): Require INTVAL (operands[3])
to be strictly smaller than 1 << shiftcount.
2011-06-04 Jan Hubicka <jh@suse.cz>
PR tree-optimize/48929

2
gcc/config/i386/i386.md
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@ -6419,7 +6419,7 @@
|| optimize_function_for_size_p (cfun))
&& ((unsigned HOST_WIDE_INT) INTVAL (operands[2])) - 1 < 3
&& ((unsigned HOST_WIDE_INT) INTVAL (operands[3])
<= ((unsigned HOST_WIDE_INT) 1 << INTVAL (operands[2])))"
< ((unsigned HOST_WIDE_INT) 1 << INTVAL (operands[2])))"
"#"
"&& reload_completed"
[(const_int 0)]

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2011-06-04 Jakub Jelinek <jakub@redhat.com>
PR target/49281
* gcc.c-torture/execute/pr49281.c: New test.
2011-06-04 Jan Hubicka <jh@suse.cz>
PR tree-optimize/48929

25
gcc/testsuite/gcc.c-torture/execute/pr49281.c Normal file
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@ -0,0 +1,25 @@
/* PR target/49281 */
extern void abort (void);
__attribute__((noinline, noclone)) int
foo (int x)
{
return (x << 2) | 4;
}
__attribute__((noinline, noclone)) int
bar (int x)
{
return (x << 2) | 3;
}
int
main ()
{
if (foo (43) != 172 || foo (1) != 4 || foo (2) != 12)
abort ();
if (bar (43) != 175 || bar (1) != 7 || bar (2) != 11)
abort ();
return 0;
}