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* [gcc r13-4206] Ensure at_stmt is defined before an early exit
@ 2022-11-21 16:01 Andrew Carlotti
0 siblings, 0 replies; only message in thread
From: Andrew Carlotti @ 2022-11-21 16:01 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:f0e4f676aab589e53dbd67610378a1769030f462
commit r13-4206-gf0e4f676aab589e53dbd67610378a1769030f462
Author: Andrew Carlotti <andrew.carlotti@arm.com>
Date: Thu Oct 6 15:59:15 2022 +0100
Ensure at_stmt is defined before an early exit
This prevents a null dereference error when outputing debug information
following an early exit from number_of_iterations_exit_assumptions.
gcc/ChangeLog:
* tree-ssa-loop-niter.cc (number_of_iterations_exit_assumptions):
Move at_stmt assignment.
Diff:
---
gcc/tree-ssa-loop-niter.cc | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/gcc/tree-ssa-loop-niter.cc b/gcc/tree-ssa-loop-niter.cc
index 3fbbf4367ed..df995a66676 100644
--- a/gcc/tree-ssa-loop-niter.cc
+++ b/gcc/tree-ssa-loop-niter.cc
@@ -2537,6 +2537,9 @@ number_of_iterations_exit_assumptions (class loop *loop, edge exit,
if (!stmt)
return false;
+ if (at_stmt)
+ *at_stmt = stmt;
+
/* We want the condition for staying inside loop. */
code = gimple_cond_code (stmt);
if (exit->flags & EDGE_TRUE_VALUE)
@@ -2642,9 +2645,6 @@ number_of_iterations_exit_assumptions (class loop *loop, edge exit,
if (TREE_CODE (niter->niter) == INTEGER_CST)
niter->max = wi::to_widest (niter->niter);
- if (at_stmt)
- *at_stmt = stmt;
-
return (!integer_zerop (niter->assumptions));
}
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