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| author | Richard Biener <rguenther@suse.de> | 2023-07-24 08:40:19 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-07-24 09:50:32 +0200 |
| commit | fb132cdfb204bc12851eb1d5852eef6f03c13af3 (patch) | |
| tree | f3c37b9802a26c6799bba539e763215e0c763c48 /gcc | |
| parent | d07504725973ccdec78929a09dc13e5ebd9472f6 (diff) | |
| download | gcc-fb132cdfb204bc12851eb1d5852eef6f03c13af3.zip gcc-fb132cdfb204bc12851eb1d5852eef6f03c13af3.tar.gz gcc-fb132cdfb204bc12851eb1d5852eef6f03c13af3.tar.bz2 | |
tree-optimization/110766 - missing PHI location check
The following adds a missing PHI location check before querying
the loop latch PHI arg from it.
PR tree-optimization/110766
* tree-scalar-evolution.cc
(analyze_and_compute_bitwise_induction_effect): Check the PHI
is defined in the loop header.
* gcc.dg/torture/pr110766.c: New testcase.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr110766.c | 17 | ||||
| -rw-r--r-- | gcc/tree-scalar-evolution.cc | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr110766.c b/gcc/testsuite/gcc.dg/torture/pr110766.c new file mode 100644 index 0000000..97dcacf --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr110766.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ + +int a, b, c, e; +short d, f; +int g(int h) { return h > a ? h : h << a; } +int main() { + while (e) { + b = 0; + for (; b < 3; b++) + if (c) { + e = g(1); + f = e | d; + } + d = 0; + } + return 0; +} diff --git a/gcc/tree-scalar-evolution.cc b/gcc/tree-scalar-evolution.cc index 2abe8fa..3fb6951 100644 --- a/gcc/tree-scalar-evolution.cc +++ b/gcc/tree-scalar-evolution.cc @@ -3519,6 +3519,7 @@ analyze_and_compute_bitwise_induction_effect (class loop* loop, if (!gimple_bitwise_induction_p (phidef, &match_op[0], NULL) || TREE_CODE (match_op[2]) != SSA_NAME || !(header_phi = dyn_cast <gphi *> (SSA_NAME_DEF_STMT (match_op[2]))) + || gimple_bb (header_phi) != loop->header || gimple_phi_num_args (header_phi) != 2) return NULL_TREE; |