| ; RUN: opt -S -passes=loop-simplify,loop-fusion -debug-only=loop-fusion < %s 2>&1 | FileCheck %s |
| ; REQUIRES: asserts |
| ; CHECK: Could not hoist/sink all instructions |
| |
| declare void @unknown_func() |
| |
| define void @sink_preheader(i32 %N) { |
| ; CHECK:pre1: |
| ; CHECK-NEXT: %ptr = alloca i32 |
| ; CHECK-NEXT: br label %body1 |
| pre1: |
| %ptr = alloca i32 |
| br label %body1 |
| |
| ; CHECK:body1: |
| ; CHECK-NOT: store volatile i32 3, ptr %ptr |
| body1: ; preds = %pre1, %body1 |
| %i = phi i32 [%i_next, %body1], [0, %pre1] |
| %i_next = add i32 1, %i |
| %cond = icmp ne i32 %i, %N |
| br i1 %cond, label %body1, label %pre2 |
| |
| ; CHECK:pre2: |
| ; CHECK-NEXT: store volatile i32 3, ptr %ptr |
| pre2: |
| store volatile i32 3, ptr %ptr |
| br label %body2 |
| |
| ; CHECK: body2: |
| ; CHECK-NOT: store volatile i32 3, ptr %ptr |
| body2: ; preds = %pre2, %body2 |
| %i2 = phi i32 [%i_next2, %body2], [0, %pre2] |
| %i_next2 = add i32 1, %i2 |
| %cond2 = icmp ne i32 %i2, %N |
| br i1 %cond2, label %body2, label %exit |
| |
| ; CHECK: exit: |
| exit: |
| ret void |
| } |