Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/test/Transforms/DeadStoreElimination/invariant.start.ll

@@ -1,34 +0,0 @@
-; Test to make sure llvm.invariant.start calls are not treated as clobbers.
-; RUN: opt < %s -basicaa -dse -S | FileCheck %s
-
-declare {}* @llvm.invariant.start.p0i8(i64, i8* nocapture) nounwind readonly
-
-; We cannot remove the store 1 to %p.
-; FIXME: By the semantics of invariant.start, the store 3 to p is unreachable.
-define void @test(i8 *%p) {
-  store i8 1, i8* %p, align 4
-  %i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %p)
-  store i8 3, i8* %p, align 4
-  ret void
-; CHECK-LABEL: @test(
-; CHECK-NEXT: store i8 1, i8* %p, align 4
-; CHECK-NEXT: %i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %p)
-; CHECK-NEXT: store i8 3, i8* %p, align 4
-; CHECK-NEXT: ret void
-}
-
-; FIXME: We should be able to remove the first store to p, even though p and q
-; may alias.
-define void @test2(i8* %p, i8* %q) {
-  store i8 1, i8* %p, align 4
-  store i8 2, i8* %q, align 4
-  %i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %q)
-  store i8 3, i8* %p, align 4
-  ret void
-; CHECK-LABEL: @test2(
-; CHECK-NEXT: store i8 1, i8* %p, align 4
-; CHECK-NEXT: store i8 2, i8* %q, align 4
-; CHECK-NEXT: %i = call {}* @llvm.invariant.start.p0i8(i64 1, i8* %q)
-; CHECK-NEXT: store i8 3, i8* %p, align 4
-; CHECK-NEXT: ret void
-}