| ; RUN: opt -S -basic-aa -licm < %s | FileCheck %s |
| ; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' -S %s| FileCheck %s |
| ; |
| ; Manually validate LCSSA form is preserved even after SSAUpdater is used to |
| ; promote things in the loop bodies. |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @x = common global i32 0, align 4 |
| @y = common global i32 0, align 4 |
| |
| define void @PR18688() { |
| ; CHECK-LABEL: @PR18688( |
| |
| entry: |
| br i1 undef, label %return, label %outer.preheader |
| |
| outer.preheader: |
| br label %outer.header |
| ; CHECK: outer.preheader: |
| ; CHECK: br label %outer.header |
| |
| outer.header: |
| store i32 0, i32* @x, align 4 |
| br i1 undef, label %outer.latch, label %inner.preheader |
| ; CHECK: outer.header: |
| ; CHECK-NEXT: br i1 undef, label %outer.latch, label %inner.preheader |
| |
| inner.preheader: |
| br label %inner.header |
| ; CHECK: inner.preheader: |
| ; CHECK-NEXT: br label %inner.header |
| |
| inner.header: |
| br i1 undef, label %inner.body.rhs, label %inner.latch |
| ; CHECK: inner.header: |
| ; CHECK-NEXT: %[[PHI0:[^,]+]] = phi i32 [ %{{[^,]+}}, %inner.latch ], [ 0, %inner.preheader ] |
| ; CHECK-NEXT: br i1 undef, label %inner.body.rhs, label %inner.latch |
| |
| inner.body.rhs: |
| store i32 0, i32* @x, align 4 |
| br label %inner.latch |
| ; CHECK: inner.body.rhs: |
| ; CHECK-NEXT: br label %inner.latch |
| |
| inner.latch: |
| %y_val = load i32, i32* @y, align 4 |
| %icmp = icmp eq i32 %y_val, 0 |
| br i1 %icmp, label %inner.exit, label %inner.header |
| ; CHECK: inner.latch: |
| ; CHECK-NEXT: %[[PHI1:[^,]+]] = phi i32 [ 0, %inner.body.rhs ], [ %[[PHI0]], %inner.header ] |
| ; CHECK-NEXT: br i1 %{{[^,]+}}, label %inner.exit, label %inner.header |
| |
| inner.exit: |
| br label %outer.latch |
| ; CHECK: inner.exit: |
| ; CHECK-NEXT: %[[INNER_LCSSA:[^,]+]] = phi i32 [ %[[PHI1]], %inner.latch ] |
| ; CHECK-NEXT: br label %outer.latch |
| |
| outer.latch: |
| br i1 undef, label %outer.exit, label %outer.header |
| ; CHECK: outer.latch: |
| ; CHECK-NEXT: %[[PHI2:[^,]+]] = phi i32 [ %[[INNER_LCSSA]], %inner.exit ], [ 0, %outer.header ] |
| ; CHECK-NEXT: br i1 {{.*}}, label %outer.exit, label %outer.header |
| |
| outer.exit: |
| br label %return |
| ; CHECK: outer.exit: |
| ; CHECK-NEXT: %[[OUTER_LCSSA:[^,]+]] = phi i32 [ %[[PHI2]], %outer.latch ] |
| ; CHECK-NEXT: store i32 %[[OUTER_LCSSA]] |
| ; CHECK-NEXT: br label %return |
| |
| return: |
| ret void |
| } |
| |