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From: Richard Biener <rguenth@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r10-11179] tree-optimization/107554 - fix ICE in stlen optimization Date: Thu, 26 Jan 2023 13:05:53 +0000 (GMT) [thread overview] Message-ID: <20230126130553.0C646385842E@sourceware.org> (raw) 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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