| ; RUN: opt < %s -scalar-evolution -analyze -enable-new-pm=0 | FileCheck %s |
| ; RUN: opt < %s "-passes=print<scalar-evolution>" -disable-output 2>&1 | FileCheck %s |
| |
| define void @test1(i32 %n) { |
| entry: |
| %s = mul i32 %n, 96 |
| br label %loop |
| loop: |
| %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] |
| %i.next = add i32 %i, 32 |
| %t = icmp ne i32 %i.next, %s |
| br i1 %t, label %loop, label %exit |
| exit: |
| ret void |
| |
| ; CHECK-LABEL: @test1 |
| ; CHECK: Loop %loop: backedge-taken count is ((-32 + (96 * %n)) /u 32) |
| ; CHECK: Loop %loop: max backedge-taken count is 134217727 |
| } |
| |
| ; PR19183 |
| define i32 @test2(i32 %n) { |
| entry: |
| %s = and i32 %n, -32 |
| br label %loop |
| loop: |
| %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] |
| %i.next = add i32 %i, 32 |
| %t = icmp ne i32 %i.next, %s |
| br i1 %t, label %loop, label %exit |
| exit: |
| ret i32 %i |
| |
| ; CHECK-LABEL: @test2 |
| ; CHECK: Loop %loop: backedge-taken count is ((-32 + (32 * (%n /u 32))<nuw>) /u 32) |
| ; CHECK: Loop %loop: max backedge-taken count is 134217727 |
| } |
| |
| define void @test3(i32 %n) { |
| entry: |
| %s = mul i32 %n, 96 |
| br label %loop |
| loop: |
| %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] |
| %i.next = add i32 %i, 96 |
| %t = icmp ne i32 %i.next, %s |
| br i1 %t, label %loop, label %exit |
| exit: |
| ret void |
| |
| ; CHECK-LABEL: @test3 |
| ; CHECK: Loop %loop: backedge-taken count is ((-32 + (32 * %n)) /u 32) |
| ; CHECK: Loop %loop: max backedge-taken count is 134217727 |
| } |
| |
| define void @test4(i32 %n) { |
| entry: |
| %s = mul i32 %n, 4 |
| br label %loop |
| loop: |
| %i = phi i32 [ 0, %entry ], [ %i.next, %loop ] |
| %i.next = add i32 %i, 12 |
| %t = icmp ne i32 %i.next, %s |
| br i1 %t, label %loop, label %exit |
| exit: |
| ret void |
| |
| ; CHECK-LABEL: @test4 |
| ; CHECK: Loop %loop: backedge-taken count is ((-4 + (-1431655764 * %n)) /u 4) |
| ; CHECK: Loop %loop: max backedge-taken count is 1073741823 |
| } |
| |
| define void @test5(i32 %n) { |
| entry: |
| %s = mul i32 %n, 4 |
| br label %loop |
| loop: |
| %i = phi i32 [ %s, %entry ], [ %i.next, %loop ] |
| %i.next = add i32 %i, -4 |
| %t = icmp ne i32 %i.next, 0 |
| br i1 %t, label %loop, label %exit |
| exit: |
| ret void |
| |
| ; CHECK-LABEL: @test5 |
| ; CHECK: Loop %loop: backedge-taken count is ((-4 + (4 * %n)) /u 4) |
| ; CHECK: Loop %loop: max backedge-taken count is 1073741823 |
| } |