analyze_and_compute_bitop_with_inv_effect assumes the first operand is
loop invariant which is not the case when it's INTEGER_CST.
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}
Ok for trunk?
gcc/ChangeLog:
PR tree-optimization/105735
PR tree-optimization/111972
* tree-scalar-evolution.cc
(analyze_and_compute_bitop_with_inv_effect): Handle bitop with
INTEGER_CST.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr105735-3.c: New test.
---
gcc/testsuite/gcc.target/i386/pr105735-3.c | 87 ++++++++++++++++++++++
gcc/tree-scalar-evolution.cc | 3 +
2 files changed, 90 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/i386/pr105735-3.c
diff --git a/gcc/testsuite/gcc.target/i386/pr105735-3.c
b/gcc/testsuite/gcc.target/i386/pr105735-3.c
new file mode 100644
index 00000000000..9e268a1a997
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr105735-3.c
@@ -0,0 +1,87 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fdump-tree-sccp-details" } */
+/* { dg-final { scan-tree-dump-times {final value replacement} 8 "sccp" } } */
+
+unsigned int
+__attribute__((noipa))
+foo (unsigned int tmp)
+{
+ for (int bit = 0; bit < 64; bit++)
+ tmp &= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+foo1 (unsigned int tmp)
+{
+ for (int bit = 63; bit >= 0; bit -=3)
+ tmp &= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+foo2 (unsigned int tmp)
+{
+ for (int bit = 0; bit < 64; bit++)
+ tmp |= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+foo3 (unsigned int tmp)
+{
+ for (int bit = 63; bit >= 0; bit -=3)
+ tmp |= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+foo4 (unsigned int tmp)
+{
+ for (int bit = 0; bit < 64; bit++)
+ tmp ^= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+foo5 (unsigned int tmp)
+{
+ for (int bit = 0; bit < 63; bit++)
+ tmp ^= 11304;
+ return tmp;
+}
+
+unsigned int
+__attribute__((noipa))
+f (unsigned int tmp, int bit)
+{
+ unsigned int res = tmp;
+ for (int i = 0; i < bit; i++)
+ res &= 11304;
+ return res;
+}
+
+unsigned int
+__attribute__((noipa))
+f1 (unsigned int tmp, int bit)
+{
+ unsigned int res = tmp;
+ for (int i = 0; i < bit; i++)
+ res |= 11304;
+ return res;
+}
+
+unsigned int
+__attribute__((noipa))
+f2 (unsigned int tmp, int bit)
+{
+ unsigned int res = tmp;
+ for (int i = 0; i < bit; i++)
+ res ^= 11304;
+ return res;
+}
diff --git a/gcc/tree-scalar-evolution.cc b/gcc/tree-scalar-evolution.cc
index 95a15fe0988..33c7711f7e3 100644
--- a/gcc/tree-scalar-evolution.cc
+++ b/gcc/tree-scalar-evolution.cc
@@ -3681,6 +3681,9 @@ analyze_and_compute_bitop_with_inv_effect (class loop*
loop, tree phidef,
match_op[0] = gimple_assign_rhs1 (def);
match_op[1] = gimple_assign_rhs2 (def);
+ if (TREE_CODE (match_op[1]) == INTEGER_CST)
+ std::swap (match_op[0], match_op[1]);
+
if (TREE_CODE (match_op[1]) != SSA_NAME
|| !expr_invariant_in_loop_p (loop, match_op[0])
|| !(header_phi = dyn_cast <gphi *> (SSA_NAME_DEF_STMT (match_op[1])))
--
2.31.1
