| ; RUN: opt -verify-loop-info -irce-print-changed-loops -irce -S < %s 2>&1 | FileCheck %s |
| ; RUN: opt -verify-loop-info -irce-print-changed-loops -passes='require<branch-prob>,loop(irce)' -S < %s 2>&1 | FileCheck %s |
| |
| ; CHECK: irce: in function test_01: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK: irce: in function test_02: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| |
| ; Iterate from 0 to SINT_MAX, check that the post-loop is generated. |
| define void @test_01(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: test_01( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr |
| ; CHECK: loop: |
| ; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ] |
| ; CHECK-NEXT: %idx.next = add i32 %idx, 1 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 true, label %in.bounds, |
| ; CHECK: in.bounds: |
| ; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx |
| ; CHECK-NEXT: store i32 0, i32* %addr |
| ; CHECK-NEXT: %next = icmp slt i32 %idx.next, 2147483647 |
| ; CHECK-NEXT: [[COND:%[^ ]+]] = icmp slt i32 %idx.next, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND]], label %loop, label %main.exit.selector |
| ; CHECK: main.pseudo.exit: |
| ; CHECK-NEXT: %idx.copy = phi i32 [ 0, %entry ], [ %idx.next.lcssa, %main.exit.selector ] |
| ; CHECK-NEXT: %indvar.end = phi i32 [ 0, %entry ], [ %idx.next.lcssa, %main.exit.selector ] |
| ; CHECK-NEXT: br label %postloop |
| ; CHECK: postloop: |
| ; CHECK-NEXT: br label %loop.postloop |
| ; CHECK: loop.postloop: |
| ; CHECK-NEXT: %idx.postloop = phi i32 [ %idx.copy, %postloop ], [ %idx.next.postloop, %in.bounds.postloop ] |
| ; CHECK-NEXT: %idx.next.postloop = add i32 %idx.postloop, 1 |
| ; CHECK-NEXT: %abc.postloop = icmp slt i32 %idx.postloop, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 %abc.postloop, label %in.bounds.postloop, label %out.of.bounds.loopexit |
| ; CHECK: in.bounds.postloop: |
| ; CHECK-NEXT: %addr.postloop = getelementptr i32, i32* %arr, i32 %idx.postloop |
| ; CHECK-NEXT: store i32 0, i32* %addr.postloop |
| ; CHECK-NEXT: %next.postloop = icmp slt i32 %idx.next.postloop, 2147483647 |
| ; CHECK-NEXT: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !0 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, 1 |
| %abc = icmp slt i32 %idx, %len |
| br i1 %abc, label %in.bounds, label %out.of.bounds |
| |
| in.bounds: |
| %addr = getelementptr i32, i32* %arr, i32 %idx |
| store i32 0, i32* %addr |
| %next = icmp slt i32 %idx.next, 2147483647 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; Iterate from SINT_MAX to 0, check that the pre-loop is generated. |
| define void @test_02(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: test_02( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %len = load i32, i32* %a_len_ptr, !range !0 |
| ; CHECH-NEXT: br i1 true, label %loop.preloop.preheader |
| ; CHECK: mainloop: |
| ; CHECK-NEXT: br label %loop |
| ; CHECK: loop: |
| ; CHECK-NEXT: %idx = phi i32 [ %idx.preloop.copy, %mainloop ], [ %idx.next, %in.bounds ] |
| ; CHECK-NEXT: %idx.next = add i32 %idx, -1 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %len |
| ; CHECK-NEXT: br i1 true, label %in.bounds |
| ; CHECK: in.bounds: |
| ; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx |
| ; CHECK-NEXT: store i32 0, i32* %addr |
| ; CHECK-NEXT: %next = icmp sgt i32 %idx.next, -1 |
| ; CHECK-NEXT: br i1 %next, label %loop, label %exit.loopexit |
| ; CHECK: loop.preloop: |
| ; CHECK-NEXT: %idx.preloop = phi i32 [ %idx.next.preloop, %in.bounds.preloop ], [ 2147483647, %loop.preloop.preheader ] |
| ; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -1 |
| ; CHECK-NEXT: %abc.preloop = icmp slt i32 %idx.preloop, %len |
| ; CHECK-NEXT: br i1 %abc.preloop, label %in.bounds.preloop, label %out.of.bounds.loopexit |
| ; CHECK: in.bounds.preloop: |
| ; CHECK-NEXT: %addr.preloop = getelementptr i32, i32* %arr, i32 %idx.preloop |
| ; CHECK-NEXT: store i32 0, i32* %addr.preloop |
| ; CHECK-NEXT: %next.preloop = icmp sgt i32 %idx.next.preloop, -1 |
| ; CHECK-NEXT: [[COND:%[^ ]+]] = icmp sgt i32 %idx.next.preloop, -1 |
| ; CHECK-NEXT: br i1 [[COND]], label %loop.preloop, label %preloop.exit.selector |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !0 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 2147483647, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, -1 |
| %abc = icmp slt i32 %idx, %len |
| br i1 %abc, label %in.bounds, label %out.of.bounds |
| |
| in.bounds: |
| %addr = getelementptr i32, i32* %arr, i32 %idx |
| store i32 0, i32* %addr |
| %next = icmp sgt i32 %idx.next, -1 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| !0 = !{i32 0, i32 50} |