| ; RUN: opt -S -loop-sink < %s | FileCheck %s |
| |
| ; The load instruction should not be sunk into following loop. |
| ; CHECK: @foo |
| ; CHECK-NEXT: entry |
| ; CHECK-NEXT: %ptr = load i8*, i8** %pp, align 8 |
| ; CHECK-NEXT: store i8* null, i8** %pp, align 8 |
| |
| define i32 @foo(i32 %n, i8** %pp) !prof !0 { |
| entry: |
| %ptr = load i8*, i8** %pp, align 8 |
| store i8* null, i8** %pp, align 8 |
| br label %for.cond |
| |
| for.cond: ; preds = %for.body, %entry |
| %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| %cmp = icmp ult i32 %i.0, %n |
| br i1 %cmp, label %for.body, label %for.end, !prof !1 |
| |
| for.body: ; preds = %for.cond |
| %0 = sext i32 %i.0 to i64 |
| %arrayidx = getelementptr inbounds i8, i8* %ptr, i64 %0 |
| %1 = load i8, i8* %arrayidx, align 1 |
| %or19 = call i8 @llvm.bitreverse.i8(i8 %1) |
| %v = sext i8 %or19 to i32 |
| %inc = add i32 %i.0, %v |
| br label %for.cond |
| |
| for.end: ; preds = %for.cond |
| ret i32 %i.0 |
| } |
| |
| declare i8 @llvm.bitreverse.i8(i8) #0 |
| attributes #0 = { nounwind readnone speculatable } |
| |
| !0 = !{!"function_entry_count", i64 1} |
| !1 = !{!"branch_weights", i32 1, i32 2000} |
