| ; RUN: opt -instcombine -S < %s | FileCheck %s |
| |
| declare void @bar() |
| declare void @baz() |
| |
| ; Check that dereferenceable_or_null metadata is combined |
| ; CHECK-LABEL: cont: |
| ; CHECK: load i32*, i32** |
| ; CHECK-SAME: !dereferenceable_or_null ![[DEREF:[0-9]+]] |
| define i32* @test_phi_combine_load_metadata(i1 %c, i32** dereferenceable(8) %p1, i32** dereferenceable(8) %p2) { |
| br i1 %c, label %t, label %f |
| t: |
| call void @bar() |
| %v1 = load i32*, i32** %p1, align 8, !dereferenceable_or_null !0 |
| br label %cont |
| |
| f: |
| call void @baz() |
| %v2 = load i32*, i32** %p2, align 8, !dereferenceable_or_null !1 |
| br label %cont |
| |
| cont: |
| %res = phi i32* [ %v1, %t ], [ %v2, %f ] |
| ret i32* %res |
| } |
| |
| ; CHECK: ![[DEREF]] = !{i64 8} |
| |
| !0 = !{i64 8} |
| !1 = !{i64 16} |