1 ; RUN: opt -S -basicaa -licm < %s | FileCheck %s 2 ; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' -S %s| FileCheck %s 3 ; 4 ; Manually validate LCSSA form is preserved even after SSAUpdater is used to 5 ; promote things in the loop bodies. 6 7 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 8 target triple = "x86_64-unknown-linux-gnu" 9 10 @x = common global i32 0, align 4 11 @y = common global i32 0, align 4 12 13 define void @PR18688() { 14 ; CHECK-LABEL: @PR18688( 15 16 entry: 17 br i1 undef, label %return, label %outer.preheader 18 19 outer.preheader: 20 br label %outer.header 21 ; CHECK: outer.preheader: 22 ; CHECK: br label %outer.header 23 24 outer.header: 25 store i32 0, i32* @x, align 4 26 br i1 undef, label %outer.latch, label %inner.preheader 27 ; CHECK: outer.header: 28 ; CHECK-NEXT: br i1 undef, label %outer.latch, label %inner.preheader 29 30 inner.preheader: 31 br label %inner.header 32 ; CHECK: inner.preheader: 33 ; CHECK-NEXT: br label %inner.header 34 35 inner.header: 36 br i1 undef, label %inner.body.rhs, label %inner.latch 37 ; CHECK: inner.header: 38 ; CHECK-NEXT: %[[PHI0:[^,]+]] = phi i32 [ %{{[^,]+}}, %inner.latch ], [ 0, %inner.preheader ] 39 ; CHECK-NEXT: br i1 undef, label %inner.body.rhs, label %inner.latch 40 41 inner.body.rhs: 42 store i32 0, i32* @x, align 4 43 br label %inner.latch 44 ; CHECK: inner.body.rhs: 45 ; CHECK-NEXT: br label %inner.latch 46 47 inner.latch: 48 %y_val = load i32, i32* @y, align 4 49 %icmp = icmp eq i32 %y_val, 0 50 br i1 %icmp, label %inner.exit, label %inner.header 51 ; CHECK: inner.latch: 52 ; CHECK-NEXT: %[[PHI1:[^,]+]] = phi i32 [ 0, %inner.body.rhs ], [ %[[PHI0]], %inner.header ] 53 ; CHECK-NEXT: br i1 %{{[^,]+}}, label %inner.exit, label %inner.header 54 55 inner.exit: 56 br label %outer.latch 57 ; CHECK: inner.exit: 58 ; CHECK-NEXT: %[[INNER_LCSSA:[^,]+]] = phi i32 [ %[[PHI1]], %inner.latch ] 59 ; CHECK-NEXT: br label %outer.latch 60 61 outer.latch: 62 br i1 undef, label %outer.exit, label %outer.header 63 ; CHECK: outer.latch: 64 ; CHECK-NEXT: %[[PHI2:[^,]+]] = phi i32 [ %[[INNER_LCSSA]], %inner.exit ], [ 0, %outer.header ] 65 ; CHECK-NEXT: br i1 {{.*}}, label %outer.exit, label %outer.header 66 67 outer.exit: 68 br label %return 69 ; CHECK: outer.exit: 70 ; CHECK-NEXT: %[[OUTER_LCSSA:[^,]+]] = phi i32 [ %[[PHI2]], %outer.latch ] 71 ; CHECK-NEXT: store i32 %[[OUTER_LCSSA]] 72 ; CHECK-NEXT: br label %return 73 74 return: 75 ret void 76 } 77 78
