diff options
| author | Richard Biener <rguenther@suse.de> | 2017-04-27 11:42:57 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-04-27 11:42:57 +0000 |
| commit | 1b7c8d39fb9f98a73adfd125b5f3b768c6401cd2 (patch) | |
| tree | 0162d1c63f240c0d17e565190baaf3fa6ffa4ea4 /gcc/tree-chrec.c | |
| parent | a6d25cadecc8f573fa66131b8a89c9047d596794 (diff) | |
re PR middle-end/80539 (gcc ICE at -O2 and above on valid code on x86_64-linux-gnu in "chrec_fold_plus_poly_poly")
2017-04-27 Richard Biener <rguenther@suse.de>
PR middle-end/80539
* tree-chrec.c (chrec_fold_plus_poly_poly): Deal with not
being in loop-closed SSA form conservatively.
(chrec_fold_multiply_poly_poly): Likewise.
* gcc.dg/torture/pr80539.c: New testcase.
From-SVN: r247322
Diffstat (limited to 'gcc/tree-chrec.c')
| -rw-r--r-- | gcc/tree-chrec.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/gcc/tree-chrec.c b/gcc/tree-chrec.c index 80a1bbd2327..28c08e7115c 100644 --- a/gcc/tree-chrec.c +++ b/gcc/tree-chrec.c @@ -149,7 +149,12 @@ chrec_fold_plus_poly_poly (enum tree_code code, /* This function should never be called for chrecs of loops that do not belong to the same loop nest. */ - gcc_assert (loop0 == loop1); + if (loop0 != loop1) + { + /* It still can happen if we are not in loop-closed SSA form. */ + gcc_assert (! loops_state_satisfies_p (LOOP_CLOSED_SSA)); + return chrec_dont_know; + } if (code == PLUS_EXPR || code == POINTER_PLUS_EXPR) { @@ -211,7 +216,12 @@ chrec_fold_multiply_poly_poly (tree type, chrec_fold_multiply (type, CHREC_LEFT (poly0), poly1), CHREC_RIGHT (poly0)); - gcc_assert (loop0 == loop1); + if (loop0 != loop1) + { + /* It still can happen if we are not in loop-closed SSA form. */ + gcc_assert (! loops_state_satisfies_p (LOOP_CLOSED_SSA)); + return chrec_dont_know; + } /* poly0 and poly1 are two polynomials in the same variable, {a, +, b}_x * {c, +, d}_x -> {a*c, +, a*d + b*c + b*d, +, 2*b*d}_x. */ |