| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -canon-freeze -S | FileCheck %s |
| ; A set of tests that have several phi nodes |
| declare void @call(i32) |
| declare i32 @call2() |
| |
| define void @onephi_used(i32 %n, i32 %i.init, i32 %j.init) { |
| ; CHECK-LABEL: @onephi_used( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[I_INIT_FROZEN:%.*]] = freeze i32 [[I_INIT:%.*]] |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INIT_FROZEN]], [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_INIT:%.*]], [[ENTRY]] ], [ [[J_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1 |
| ; CHECK-NEXT: [[J_NEXT]] = add nuw nsw i32 [[J]], -2 |
| ; CHECK-NEXT: call void @call(i32 [[I]]) |
| ; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[I_NEXT]], [[N:%.*]] |
| ; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT:%.*]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop |
| loop: |
| %i = phi i32 [ %i.init, %entry ], [ %i.next, %loop ] |
| %j = phi i32 [ %j.init, %entry ], [ %j.next, %loop ] |
| %i.next = add nuw nsw i32 %i, 1 |
| %j.next = add nuw nsw i32 %j, -2 |
| %i.fr = freeze i32 %i |
| call void @call(i32 %i.fr) |
| %cond = icmp eq i32 %i.next, %n |
| br i1 %cond, label %loop, label %exit |
| |
| exit: |
| ret void |
| } |
| |
| ; Negative test |
| define void @twophis_used(i32 %n, i32 %i.init, i32 %j.init) { |
| ; CHECK-LABEL: @twophis_used( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INIT:%.*]], [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_INIT:%.*]], [[ENTRY]] ], [ [[J_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[I_NEXT]] = add nuw nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[J_NEXT]] = add nuw nsw i32 [[J]], -2 |
| ; CHECK-NEXT: [[IJ:%.*]] = add i32 [[I]], [[J]] |
| ; CHECK-NEXT: [[IJ_FR:%.*]] = freeze i32 [[IJ]] |
| ; CHECK-NEXT: call void @call(i32 [[IJ_FR]]) |
| ; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[I_NEXT]], [[N:%.*]] |
| ; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT:%.*]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop |
| loop: |
| %i = phi i32 [ %i.init, %entry ], [ %i.next, %loop ] |
| %j = phi i32 [ %j.init, %entry ], [ %j.next, %loop ] |
| %i.next = add nuw nsw i32 %i, 1 |
| %j.next = add nuw nsw i32 %j, -2 |
| %ij = add i32 %i, %j |
| %ij.fr = freeze i32 %ij |
| call void @call(i32 %ij.fr) |
| %cond = icmp eq i32 %i.next, %n |
| br i1 %cond, label %loop, label %exit |
| |
| exit: |
| ret void |
| } |
| |
| ; Negative test |
| define void @nonindphi_used(i32 %n, i32 %i.init, i32 %j.init, i32 %k.init) { |
| ; CHECK-LABEL: @nonindphi_used( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: br label [[LOOP:%.*]] |
| ; CHECK: loop: |
| ; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[I_INIT:%.*]], [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[J:%.*]] = phi i32 [ [[J_INIT:%.*]], [[ENTRY]] ], [ [[J_NEXT:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[K:%.*]] = phi i32 [ [[K_INIT:%.*]], [[ENTRY]] ], [ [[ANY:%.*]], [[LOOP]] ] |
| ; CHECK-NEXT: [[I_NEXT]] = add nuw nsw i32 [[I]], 1 |
| ; CHECK-NEXT: [[J_NEXT]] = add nuw nsw i32 [[J]], -2 |
| ; CHECK-NEXT: [[IJ:%.*]] = add i32 [[I]], [[J]] |
| ; CHECK-NEXT: [[IJK:%.*]] = add i32 [[IJ]], [[K]] |
| ; CHECK-NEXT: [[IJK_FR:%.*]] = freeze i32 [[IJK]] |
| ; CHECK-NEXT: call void @call(i32 [[IJK_FR]]) |
| ; CHECK-NEXT: [[ANY]] = call i32 @call2() |
| ; CHECK-NEXT: [[COND:%.*]] = icmp eq i32 [[I_NEXT]], [[N:%.*]] |
| ; CHECK-NEXT: br i1 [[COND]], label [[LOOP]], label [[EXIT:%.*]] |
| ; CHECK: exit: |
| ; CHECK-NEXT: ret void |
| ; |
| entry: |
| br label %loop |
| |
| loop: |
| %i = phi i32 [ %i.init, %entry ], [ %i.next, %loop ] |
| %j = phi i32 [ %j.init, %entry ], [ %j.next, %loop ] |
| %k = phi i32 [ %k.init, %entry ], [ %any, %loop ] |
| %i.next = add nuw nsw i32 %i, 1 |
| %j.next = add nuw nsw i32 %j, -2 |
| %ij = add i32 %i, %j |
| %ijk = add i32 %ij, %k |
| %ijk.fr = freeze i32 %ijk |
| call void @call(i32 %ijk.fr) |
| %any = call i32 @call2() |
| %cond = icmp eq i32 %i.next, %n |
| br i1 %cond, label %loop, label %exit |
| |
| exit: |
| ret void |
| } |