[clang] [llvm] [IR] Avoid creating icmp/fcmp constant expressions (PR #92885)

[Philip Reames via llvm-commits]

================
@@ -8,7 +8,8 @@
 // CHECK:      entry:
 // CHECK-NEXT:   %retval = alloca i32
 // CHECK-NEXT:   store i32 0, ptr %retval
-// CHECK-NEXT:   [[ZEXT:%.*]] = zext i1 true to i32
+// CHECK-NEXT:   [[CMP:%.*]] = icmp ne ptr @b, @a
+// CHECK-NEXT:   [[ZEXT:%.*]] = zext i1 [[CMP]] to i32
----------------
preames wrote:

This looks to be a missing constant fold somewhere.  The compare should be folded to true, not a constantexpr.  

https://github.com/llvm/llvm-project/pull/92885