| ; RUN: opt -passes='default<O1>' -disable-verify --mtriple x86_64-pc-linux-gnu -new-pm-disable-loop-unrolling=true \ |
| ; RUN: -S -o - %s | FileCheck %s |
| |
| ; This checks that the loop full unroller will fire in the new pass manager |
| ; when forced via #pragma in the source (or annotation in the code). |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; We don't end up deleting the loop, merely turning it infinite, but we remove |
| ; everything inside of it so check for the loop structure and absence of |
| ; conditional branches. |
| ; CHECK-LABEL: bb |
| ; CHECK: br label |
| ; CHECK-NOT: br i1 |
| ; CHECK: br label |
| ; CHECK-NOT: br i1 |
| |
| ; Function Attrs: noinline nounwind optnone uwtable |
| define void @foo() #0 { |
| bb: |
| %tmp = alloca [5 x i32*], align 16 |
| %tmp1 = alloca i32, align 4 |
| %tmp2 = alloca i32, align 4 |
| store i32 5, i32* %tmp1, align 4 |
| br label %bb3 |
| |
| bb3: ; preds = %bb23, %bb |
| %tmp4 = load i32, i32* %tmp1, align 4 |
| %tmp5 = icmp ne i32 %tmp4, 0 |
| br i1 %tmp5, label %bb6, label %bb24 |
| |
| bb6: ; preds = %bb3 |
| store i32 0, i32* %tmp2, align 4 |
| br label %bb7 |
| |
| bb7: ; preds = %bb20, %bb6 |
| %tmp8 = load i32, i32* %tmp2, align 4 |
| %tmp9 = icmp slt i32 %tmp8, 5 |
| br i1 %tmp9, label %bb10, label %bb23 |
| |
| bb10: ; preds = %bb7 |
| %tmp11 = load i32, i32* %tmp2, align 4 |
| %tmp12 = sext i32 %tmp11 to i64 |
| %tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %tmp12 |
| %tmp14 = load i32*, i32** %tmp13, align 8 |
| %tmp15 = icmp ne i32* %tmp14, null |
| br i1 %tmp15, label %bb16, label %bb19 |
| |
| bb16: ; preds = %bb10 |
| %tmp17 = load i32, i32* %tmp1, align 4 |
| %tmp18 = add nsw i32 %tmp17, -1 |
| store i32 %tmp18, i32* %tmp1, align 4 |
| br label %bb19 |
| |
| bb19: ; preds = %bb16, %bb10 |
| br label %bb20 |
| |
| bb20: ; preds = %bb19 |
| %tmp21 = load i32, i32* %tmp2, align 4 |
| %tmp22 = add nsw i32 %tmp21, 1 |
| store i32 %tmp22, i32* %tmp2, align 4 |
| br label %bb7, !llvm.loop !1 |
| |
| bb23: ; preds = %bb7 |
| br label %bb3 |
| |
| bb24: ; preds = %bb3 |
| ret void |
| } |
| |
| attributes #0 = { noinline nounwind optnone uwtable } |
| |
| !llvm.module.flags = !{!0} |
| |
| !0 = !{i32 1, !"wchar_size", i32 4} |
| !1 = distinct !{!1, !2} |
| !2 = !{!"llvm.loop.unroll.full"} |