diff options
Diffstat (limited to 'llvm/test/Transforms/SROA/select-load.ll')
| -rw-r--r-- | llvm/test/Transforms/SROA/select-load.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SROA/select-load.ll b/llvm/test/Transforms/SROA/select-load.ll index aac7af93d219..7df72419b0ce 100644 --- a/llvm/test/Transforms/SROA/select-load.ll +++ b/llvm/test/Transforms/SROA/select-load.ll @@ -409,7 +409,31 @@ entry: ret i32 %r } +; When promoting speculative instruction, metadata that may trigger immediate UB should be dropped. +define void @load_of_select_with_noundef_nonnull(ptr %buffer, i1 %b) { +; CHECK-PRESERVE-CFG-LABEL: @load_of_select_with_noundef_nonnull( +; CHECK-PRESERVE-CFG-NEXT: [[UB_PTR:%.*]] = alloca ptr, align 8 +; CHECK-PRESERVE-CFG-NEXT: [[SELECT_PTR:%.*]] = select i1 [[B:%.*]], ptr [[BUFFER:%.*]], ptr [[UB_PTR]] +; CHECK-PRESERVE-CFG-NEXT: [[LOAD_PTR:%.*]] = load ptr, ptr [[SELECT_PTR]], align 8, !nonnull !1, !noundef !1 +; CHECK-PRESERVE-CFG-NEXT: ret void +; +; CHECK-MODIFY-CFG-LABEL: @load_of_select_with_noundef_nonnull( +; CHECK-MODIFY-CFG-NEXT: br i1 [[B:%.*]], label [[DOTTHEN:%.*]], label [[DOTCONT:%.*]] +; CHECK-MODIFY-CFG: .then: +; CHECK-MODIFY-CFG-NEXT: [[LOAD_PTR_THEN_VAL:%.*]] = load ptr, ptr [[BUFFER:%.*]], align 8, !nonnull !2, !noundef !2 +; CHECK-MODIFY-CFG-NEXT: br label [[DOTCONT]] +; CHECK-MODIFY-CFG: .cont: +; CHECK-MODIFY-CFG-NEXT: [[LOAD_PTR:%.*]] = phi ptr [ [[LOAD_PTR_THEN_VAL]], [[DOTTHEN]] ], [ undef, [[TMP0:%.*]] ] +; CHECK-MODIFY-CFG-NEXT: ret void +; + %ub_ptr = alloca ptr + %select_ptr = select i1 %b, ptr %buffer, ptr %ub_ptr + %load_ptr = load ptr, ptr %select_ptr, !nonnull !1, !noundef !1 + ret void +} + !0 = !{!"branch_weights", i32 1, i32 99} +!1 = !{} ; Ensure that the branch metadata is reversed to match the reversals above. |