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Diffstat (limited to 'toolchain/gcc/patches/11.2.0/001-v11.3.0-ranger-Fix-up-fold_using_range-range_of_address-PR10.patch')
| -rw-r--r-- | toolchain/gcc/patches/11.2.0/001-v11.3.0-ranger-Fix-up-fold_using_range-range_of_address-PR10.patch | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/toolchain/gcc/patches/11.2.0/001-v11.3.0-ranger-Fix-up-fold_using_range-range_of_address-PR10.patch b/toolchain/gcc/patches/11.2.0/001-v11.3.0-ranger-Fix-up-fold_using_range-range_of_address-PR10.patch deleted file mode 100644 index 71bbfe5a1d..0000000000 --- a/toolchain/gcc/patches/11.2.0/001-v11.3.0-ranger-Fix-up-fold_using_range-range_of_address-PR10.patch +++ /dev/null @@ -1,114 +0,0 @@ -From a6219e8e0719b14f474b0dcaa7bde2f4e57474f9 Mon Sep 17 00:00:00 2001 -From: Jakub Jelinek <jakub@redhat.com> -Date: Wed, 17 Nov 2021 13:45:53 +0100 -Subject: [PATCH] ranger: Fix up fold_using_range::range_of_address [PR103255] - -If on &base->member the offset isn't constant or isn't zero and --fdelete-null-pointer-checks and not -fwrapv-pointer and base has a range -that doesn't include NULL, we return the range of the base. -Usually it isn't a big deal, because for most pointers we just use -varying, range_zero and range_nonzero ranges and nothing beyond that, -but if a pointer is initialized from a constant, we actually track the -exact range and in that case this causes miscompilation. -As discussed on IRC, I think doing something like: - offset_int off2; - if (off_cst && off.is_constant (&off2)) - { - tree cst = wide_int_to_tree (sizetype, off2 / BITS_PER_UNIT); - // adjust range r with POINTER_PLUS_EXPR cst - if (!range_includes_zero_p (&r)) - return true; - } - // Fallback - r = range_nonzero (TREE_TYPE (gimple_assign_rhs1 (stmt))); - return true; -could work, given that most of the pointer ranges are just the simple ones -perhaps it is too much for little benefit. - -2021-11-17 Jakub Jelinek <jakub@redhat.com> - - PR tree-optimization/103255 - * gimple-range.cc (fold_using_range::range_of_address): Return - range_nonzero rather than unadjusted base's range. Formatting fixes. - - * gcc.c-torture/execute/pr103255.c: New test. - -(cherry picked from commit c39cb6bf835ca12e590eaa6f90222e51be207c50) ---- - gcc/gimple-range.cc | 16 +++++--- - .../gcc.c-torture/execute/pr103255.c | 41 +++++++++++++++++++ - 2 files changed, 52 insertions(+), 5 deletions(-) - create mode 100644 gcc/testsuite/gcc.c-torture/execute/pr103255.c - ---- a/gcc/gimple-range.cc -+++ b/gcc/gimple-range.cc -@@ -491,14 +491,20 @@ gimple_ranger::range_of_address (irange - } - /* If &X->a is equal to X, the range of X is the result. */ - if (off_cst && known_eq (off, 0)) -- return true; -+ return true; - else if (flag_delete_null_pointer_checks - && !TYPE_OVERFLOW_WRAPS (TREE_TYPE (expr))) - { -- /* For -fdelete-null-pointer-checks -fno-wrapv-pointer we don't -- allow going from non-NULL pointer to NULL. */ -- if(!range_includes_zero_p (&r)) -- return true; -+ /* For -fdelete-null-pointer-checks -fno-wrapv-pointer we don't -+ allow going from non-NULL pointer to NULL. */ -+ if (!range_includes_zero_p (&r)) -+ { -+ /* We could here instead adjust r by off >> LOG2_BITS_PER_UNIT -+ using POINTER_PLUS_EXPR if off_cst and just fall back to -+ this. */ -+ r = range_nonzero (TREE_TYPE (gimple_assign_rhs1 (stmt))); -+ return true; -+ } - } - /* If MEM_REF has a "positive" offset, consider it non-NULL - always, for -fdelete-null-pointer-checks also "negative" ---- /dev/null -+++ b/gcc/testsuite/gcc.c-torture/execute/pr103255.c -@@ -0,0 +1,41 @@ -+/* PR tree-optimization/103255 */ -+ -+struct H -+{ -+ unsigned a; -+ unsigned b; -+ unsigned c; -+}; -+ -+#if __SIZEOF_POINTER__ >= 4 -+#define ADDR 0x400000 -+#else -+#define ADDR 0x4000 -+#endif -+#define OFF 0x20 -+ -+int -+main () -+{ -+ struct H *h = 0; -+ unsigned long o; -+ volatile int t = 1; -+ -+ for (o = OFF; o <= OFF; o += 0x1000) -+ { -+ struct H *u; -+ u = (struct H *) (ADDR + o); -+ if (t) -+ { -+ h = u; -+ break; -+ } -+ } -+ -+ if (h == 0) -+ return 0; -+ unsigned *tt = &h->b; -+ if ((__SIZE_TYPE__) tt != (ADDR + OFF + __builtin_offsetof (struct H, b))) -+ __builtin_abort (); -+ return 0; -+} |