Message ID | 20221011083137.336470-1-aldyh@redhat.com |
---|---|
State | New |
Headers | show |
Series | [COMMITTED,PR107195] Set range to zero when nonzero mask is 0. | expand |
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr107195-1.c b/gcc/testsuite/gcc.dg/tree-ssa/pr107195-1.c new file mode 100644 index 00000000000..a0c20dbd4b1 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr107195-1.c @@ -0,0 +1,15 @@ +// { dg-do run } +// { dg-options "-O1 -fno-tree-ccp" } + +int a, b; +int main() { + int c = 0; + if (a) + c = 1; + c = 1 & (a && c) && b; + if (a) { + b = c; + __builtin_abort (); + } + return 0; +} diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr107195-2.c b/gcc/testsuite/gcc.dg/tree-ssa/pr107195-2.c new file mode 100644 index 00000000000..d447c78bdd3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/pr107195-2.c @@ -0,0 +1,16 @@ +// { dg-do run } +// { dg-options "-O1" } + +int a, b; +int main() { + int c = 0; + long d; + for (; b < 1; b++) { + (c && d) & 3 || a; + d = c; + c = -1; + if (d) + __builtin_abort(); + } + return 0; +} diff --git a/gcc/value-range.cc b/gcc/value-range.cc index a14f9bc4394..e07d2aa9a5b 100644 --- a/gcc/value-range.cc +++ b/gcc/value-range.cc @@ -2903,6 +2903,11 @@ irange::set_range_from_nonzero_bits () } return true; } + else if (popcount == 0) + { + set_zero (type ()); + return true; + } return false; }