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| author | liuhongt <hongtao.liu@intel.com> | 2022-05-16 09:06:04 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2022-05-17 08:59:42 +0800 |
| commit | 1fba0608d12a209a5d76d65bcb1dec1c07bc33e9 (patch) | |
| tree | b013b616a7ae843b415190a79e6b6018574d675c | |
| parent | 702bd11fa7ddfce0d24581251e979e8a6d7c0d4d (diff) | |
| download | gcc-1fba0608d12a209a5d76d65bcb1dec1c07bc33e9.zip gcc-1fba0608d12a209a5d76d65bcb1dec1c07bc33e9.tar.gz gcc-1fba0608d12a209a5d76d65bcb1dec1c07bc33e9.tar.bz2 | |
Clamp vec_perm_expr index in simplify_bitfield_ref to avoid ICE.
gcc/ChangeLog:
PR tree-optimization/105591
* tree-ssa-forwprop.cc (simplify_bitfield_ref): Clamp
vec_perm_expr index.
gcc/testsuite/ChangeLog:
* gcc.dg/pr105591.c: New test.
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr105591.c | 12 | ||||
| -rw-r--r-- | gcc/tree-ssa-forwprop.cc | 13 |
2 files changed, 20 insertions, 5 deletions
diff --git a/gcc/testsuite/gcc.dg/pr105591.c b/gcc/testsuite/gcc.dg/pr105591.c new file mode 100644 index 0000000..9554c42 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr105591.c @@ -0,0 +1,12 @@ +/* { dg-do compile } */ +/* { dg-options "-Wno-psabi -O" } */ +/* { dg-additional-options "-mavx" { target x86_64-*-* i?86-*-* } } */ +typedef unsigned long long __attribute__((__vector_size__ (16))) U; +typedef unsigned long long __attribute__((__vector_size__ (32))) V; + +V +foo (U u) +{ + U x = __builtin_shuffle (u, (U) { 0xBE2ED0AB630B33FE }); + return __builtin_shufflevector (u, x, 2, 1, 0, 3); +} diff --git a/gcc/tree-ssa-forwprop.cc b/gcc/tree-ssa-forwprop.cc index 48cab58..7da3f80 100644 --- a/gcc/tree-ssa-forwprop.cc +++ b/gcc/tree-ssa-forwprop.cc @@ -2381,23 +2381,26 @@ simplify_bitfield_ref (gimple_stmt_iterator *gsi) /* One element. */ if (known_eq (size, elem_size)) - idx = TREE_INT_CST_LOW (VECTOR_CST_ELT (m, idx)); + idx = TREE_INT_CST_LOW (VECTOR_CST_ELT (m, idx)) % (2 * nelts); else { unsigned HOST_WIDE_INT nelts_op; if (!constant_multiple_p (size, elem_size, &nelts_op) || !pow2p_hwi (nelts_op)) return false; - unsigned start = TREE_INT_CST_LOW (vector_cst_elt (m, idx)); - unsigned end = TREE_INT_CST_LOW (vector_cst_elt (m, idx + nelts_op - 1)); + /* Clamp vec_perm_expr index. */ + unsigned start = TREE_INT_CST_LOW (vector_cst_elt (m, idx)) % (2 * nelts); + unsigned end = TREE_INT_CST_LOW (vector_cst_elt (m, idx + nelts_op - 1)) + % (2 * nelts); /* Be in the same vector. */ if ((start < nelts) != (end < nelts)) return false; for (unsigned HOST_WIDE_INT i = 1; i != nelts_op; i++) { /* Continuous area. */ - if (TREE_INT_CST_LOW (vector_cst_elt (m, idx + i)) - 1 - != TREE_INT_CST_LOW (vector_cst_elt (m, idx + i - 1))) + if (TREE_INT_CST_LOW (vector_cst_elt (m, idx + i)) % (2 * nelts) - 1 + != TREE_INT_CST_LOW (vector_cst_elt (m, idx + i - 1)) + % (2 * nelts)) return false; } /* Alignment not worse than before. */ |