diff options
| author | Richard Biener <rguenther@suse.de> | 2022-06-28 13:57:29 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-06-29 11:14:34 +0200 |
| commit | 2dbb45d6dc0d20dc159b3d8e27ebb6825074827a (patch) | |
| tree | 82f023984c8fc3b5a8276eb1f53188b44772101d /gcc | |
| parent | d42c1598e52ec0a33fbcc4efa39f4c299d09a3fc (diff) | |
| download | gcc-2dbb45d6dc0d20dc159b3d8e27ebb6825074827a.zip gcc-2dbb45d6dc0d20dc159b3d8e27ebb6825074827a.tar.gz gcc-2dbb45d6dc0d20dc159b3d8e27ebb6825074827a.tar.bz2 | |
tree-optimization/106112 - fix CSE from wider operation
The following fixes a mistake in looking up an extended operand
in the CSE of a truncated operation.
2022-06-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/106112
* tree-ssa-sccvn.cc (valueized_wider_op): Properly extend
a constant operand according to its type.
* gcc.dg/torture/pr106112.c: New testcase.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr106112.c | 16 | ||||
| -rw-r--r-- | gcc/tree-ssa-sccvn.cc | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr106112.c b/gcc/testsuite/gcc.dg/torture/pr106112.c new file mode 100644 index 0000000..bd7f63c --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr106112.c @@ -0,0 +1,16 @@ +/* { dg-do run } */ + +__INT32_TYPE__ a = 5, b, c, d; +__UINT64_TYPE__ e = 20862985922; +int main() +{ + __UINT32_TYPE__ f = 4294967292; + e = e | f; + c = -1 % ((~f ^ 4294967292) - (e - d)); + b = ~-~e % ~-d; + if (b) + a = 0; + if (a < 1) + __builtin_abort(); + return 0; +} diff --git a/gcc/tree-ssa-sccvn.cc b/gcc/tree-ssa-sccvn.cc index 5214f14..9deedea 100644 --- a/gcc/tree-ssa-sccvn.cc +++ b/gcc/tree-ssa-sccvn.cc @@ -4983,7 +4983,7 @@ valueized_wider_op (tree wide_type, tree op, bool allow_truncate) /* For constants simply extend it. */ if (TREE_CODE (op) == INTEGER_CST) - return wide_int_to_tree (wide_type, wi::to_wide (op)); + return wide_int_to_tree (wide_type, wi::to_widest (op)); return NULL_TREE; } |