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re PR tree-optimization/42917 ("-fcompare-debug failure" with -ftree-loop-linear)

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PR tree-optimization/42917
        * lambda-code.c (remove_iv): Skip debug statements.
        (lambda_loopnest_to_gcc_loopnest): Likewise.
        (not_interesting_stmt): Debug statements are not interesting.


Co-Authored-By: Alexandre Oliva <aoliva@redhat.com>

From-SVN: r157477
This commit is contained in:
Aldy Hernandez 2010-03-16 11:33:45 +00:00 • committed by Aldy Hernandez
parent 457eeaae81
commit 7a1817642b
3 changed files with 30 additions and 2 deletions
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8
gcc/ChangeLog
View file

@ -1,3 +1,11 @@
2010-03-16 Aldy Hernandez <aldyh@redhat.com>
Alexandre Oliva <aoliva@redhat.com>
PR tree-optimization/42917
* lambda-code.c (remove_iv): Skip debug statements.
(lambda_loopnest_to_gcc_loopnest): Likewise.
(not_interesting_stmt): Debug statements are not interesting.
2010-03-16 Jakub Jelinek <jakub@redhat.com>
PR debug/43051

8
gcc/lambda-code.c
View file

@ -1657,7 +1657,7 @@ remove_iv (gimple iv_stmt)
continue;
FOR_EACH_IMM_USE_STMT (stmt, imm_iter, arg)
if (stmt != iv_stmt)
if (stmt != iv_stmt && !is_gimple_debug (stmt))
used = true;
if (!used)
@ -1839,6 +1839,9 @@ lambda_loopnest_to_gcc_loopnest (struct loop *old_loopnest,
gimple_seq stmts;
lambda_body_vector lbv, newlbv;
if (is_gimple_debug (stmt))
continue;
/* Compute the new expression for the induction
variable. */
depth = VEC_length (tree, new_ivs);
@ -1885,7 +1888,8 @@ not_interesting_stmt (gimple stmt)
loop, we would have already failed the number of exits tests. */
if (gimple_code (stmt) == GIMPLE_LABEL
|| gimple_code (stmt) == GIMPLE_GOTO
|| gimple_code (stmt) == GIMPLE_COND)
|| gimple_code (stmt) == GIMPLE_COND
|| is_gimple_debug (stmt))
return true;
return false;
}

16
gcc/testsuite/gcc.dg/pr42917.c Normal file
View file

@ -0,0 +1,16 @@
/* { dg-do compile } */
/* { dg-options "-O1 -ftree-loop-linear -fcompare-debug -fdump-tree-ltrans" } */
extern int A[];
void
foo ()
{
int i, j;
for (i = 0; i < 4; i++)
for (j = 255; j >= 0; j--)
A[j] = 0;
}
/* { dg-final { scan-tree-dump "Successfully transformed loop" "ltrans" } } */
/* { dg-final { cleanup-tree-dump "ltrans" } } */