git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125681
91177308-0d34-0410-b5e6-
96231b3b80d8
avoids partial register stalls in some important cases.
//===---------------------------------------------------------------------===//
avoids partial register stalls in some important cases.
//===---------------------------------------------------------------------===//
+
+Some missed instcombine xforms (from GCC PR14753):
+
+void bar (void);
+
+void mask_gt (unsigned int a) {
+/* This is equivalent to a > 15. */
+if ((a & ~7) > 8)
+bar();
+}
+
+void neg_eq_cst(unsigned int a) {
+if (-a == 123)
+bar();
+}
+
+void minus_cst(unsigned int a) {
+if (20 - a == 5)
+bar();
+}
+
+void rotate_cst (unsigned a) {
+a = (a << 10) | (a >> 22);
+if (a == 123)
+bar ();
+}
+
+//===---------------------------------------------------------------------===//
+