Imported Upstream version 5.18.0.247

Former-commit-id: 2d6af2e4ed0eda5cbdc2946446ef7718456ad190

external/llvm/test/Analysis/ValueTracking/knownzero-addrspacecast.ll

@@ -1,24 +0,0 @@
-; RUN: opt -instcombine -S < %s | FileCheck %s
-
-; When a pointer is addrspacecasted to a another addr space, we cannot assume
-; anything about the new bits.
-
-target datalayout = "p:32:32-p3:32:32-p4:64:64"
-
-; CHECK-LABEL: @test_shift
-; CHECK-NOT: ret i64 0
-define i64 @test_shift(i8* %p) {
-  %g = addrspacecast i8* %p to i8 addrspace(4)*
-  %i = ptrtoint i8 addrspace(4)* %g to i64
-  %shift = lshr i64 %i, 32
-  ret i64 %shift
-}
-
-; CHECK-LABEL: @test_null
-; A null pointer casted to another addr space may no longer have null value.
-; CHECK-NOT: ret i32 0
-define i32 @test_null() {
-  %g = addrspacecast i8* null to i8 addrspace(3)*
-  %i = ptrtoint i8 addrspace(3)* %g to i32
-  ret i32 %i
-}