| ; RUN: opt < %s -S -passes=licm | FileCheck %s |
| |
| ; Check that the LICM pass does not operate on a loop which has the |
| ; llvm.licm.disable metadata. |
| ; CHECK-LABEL: @licm_disable |
| ; CHECK: entry: |
| ; CHECK-NOT: load |
| ; CHECK: do.body: |
| ; CHECK: load i64, ptr @in |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-windows-msvc" |
| |
| @in = internal unnamed_addr global ptr null, align 8 |
| @out = internal unnamed_addr global ptr null, align 8 |
| |
| define void @licm_disable(i32 %N) { |
| entry: |
| br label %do.body |
| |
| do.body: ; preds = %entry |
| %i.0 = phi i32 [ 0, %entry ], [ %inc, %do.body ] |
| %v1 = load i64, ptr @in, align 8 |
| store i64 %v1, ptr @out, align 8 |
| %inc = add nsw i32 %i.0, 1 |
| %cmp = icmp slt i32 %inc, %N |
| br i1 %cmp, label %do.body, label %do.end, !llvm.loop !1 |
| |
| do.end: ; preds = %do.body |
| ret void |
| } |
| !1 = !{!1, !2} |
| !2 = !{!"llvm.licm.disable"} |
