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* [gcc r10-11179] tree-optimization/107554 - fix ICE in stlen optimization
@ 2023-01-26 13:05 Richard Biener
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From: Richard Biener @ 2023-01-26 13:05 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:5d62d86d958a217cdb4155a557aeda1d0e644aba
commit r10-11179-g5d62d86d958a217cdb4155a557aeda1d0e644aba
Author: Richard Biener <rguenther@suse.de>
Date: Fri Nov 11 14:28:52 2022 +0100
tree-optimization/107554 - fix ICE in stlen optimization
The following fixes a wrongly typed variable causing an ICE.
PR tree-optimization/107554
* tree-ssa-strlen.c (strlen_pass::count_nonzero_bytes):
Use unsigned HOST_WIDE_INT type for the strlen.
* gcc.dg/pr107554.c: New testcase.
Co-Authored-By: Nikita Voronov <nik_1357@mail.ru>
(cherry picked from commit 81de4037454275f8ed6d858fbc129e832c6147ef)
Diff:
---
gcc/testsuite/gcc.dg/pr107554.c | 12 ++++++++++++
gcc/tree-ssa-strlen.c | 2 +-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/gcc/testsuite/gcc.dg/pr107554.c b/gcc/testsuite/gcc.dg/pr107554.c
new file mode 100644
index 00000000000..8bbe6b07ae9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr107554.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-O -foptimize-strlen" } */
+
+#define ELEMS 0x40000000
+
+int a[ELEMS];
+int b[ELEMS];
+
+int main()
+{
+ __builtin_memcpy(a, b, ELEMS*sizeof(int));
+}
diff --git a/gcc/tree-ssa-strlen.c b/gcc/tree-ssa-strlen.c
index b0874da5d1e..cc744adb3a5 100644
--- a/gcc/tree-ssa-strlen.c
+++ b/gcc/tree-ssa-strlen.c
@@ -4783,7 +4783,7 @@ count_nonzero_bytes (tree exp, unsigned HOST_WIDE_INT offset,
/* Compute the number of leading nonzero bytes in the representation
and update the minimum and maximum. */
- unsigned n = prep ? strnlen (prep, nbytes) : nbytes;
+ unsigned HOST_WIDE_INT n = prep ? strnlen (prep, nbytes) : nbytes;
if (n < lenrange[0])
lenrange[0] = n;
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