| ; 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>,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> |
| ; CHECK: irce: in function test_03: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK: irce: in function test_04: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK: irce: in function test_05: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK: irce: in function test_06: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK-NOT: irce: in function test_07: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| ; CHECK: irce: in function test_08: constrained Loop at depth 1 containing: %loop<header><exiting>,%in.bounds<latch><exiting> |
| |
| ; IV = 0; IV <s 100; IV += 7; 0 <= Len <= 50. IRCE is allowed. |
| 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-NEXT: [[COND1:%[^ ]+]] = icmp slt i32 0, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preheader, label %main.pseudo.exit |
| ; CHECK: loop.preheader: |
| ; CHECK-NEXT: br label %loop |
| ; CHECK: loop: |
| ; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ] |
| ; CHECK-NEXT: %idx.next = add i32 %idx, 7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; 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, 100 |
| ; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp slt i32 %idx.next, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop, label %main.exit.selector |
| ; CHECK: main.exit.selector: |
| ; CHECK-NEXT: %idx.next.lcssa = phi i32 [ %idx.next, %in.bounds ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp slt i32 %idx.next.lcssa, 100 |
| ; CHECK-NEXT: br i1 [[COND3]], label %main.pseudo.exit, label %exit |
| ; 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, 7 |
| ; 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, 100 |
| ; 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, 7 |
| %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, 100 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; IV = 0; IV <s MAX_INT - 7; IV += 7; 0 <= Len <= 50. IRCE is allowed. |
| define void @test_02(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_02( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr |
| ; CHECK-NEXT: [[COND1:%[^ ]+]] = icmp slt i32 0, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preheader, label %main.pseudo.exit |
| ; CHECK: loop.preheader: |
| ; CHECK-NEXT: br label %loop |
| ; CHECK: loop: |
| ; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ] |
| ; CHECK-NEXT: %idx.next = add i32 %idx, 7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; 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, 2147483640 |
| ; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp slt i32 %idx.next, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop, label %main.exit.selector |
| ; CHECK: main.exit.selector: |
| ; CHECK-NEXT: %idx.next.lcssa = phi i32 [ %idx.next, %in.bounds ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp slt i32 %idx.next.lcssa, 2147483640 |
| ; CHECK-NEXT: br i1 [[COND3]], label %main.pseudo.exit, label %exit |
| ; 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, 7 |
| ; 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, 2147483640 |
| ; 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, 7 |
| %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, 2147483640 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; IV = 0; IV <s MAX_INT; IV += 7; 0 <= Len <= MAX_INT - 7. This is the greatest |
| ; value of Len for which IRCE is allowed. |
| define void @test_03(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_03( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %exit.mainloop.at = load i32, i32* %a_len_ptr |
| ; CHECK-NEXT: [[COND1:%[^ ]+]] = icmp slt i32 0, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preheader, label %main.pseudo.exit |
| ; CHECK: loop.preheader: |
| ; CHECK-NEXT: br label %loop |
| ; CHECK: loop: |
| ; CHECK-NEXT: %idx = phi i32 [ %idx.next, %in.bounds ], [ 0, %loop.preheader ] |
| ; CHECK-NEXT: %idx.next = add i32 %idx, 7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; 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: [[COND2:%[^ ]+]] = icmp slt i32 %idx.next, %exit.mainloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop, label %main.exit.selector |
| ; CHECK: main.exit.selector: |
| ; CHECK-NEXT: %idx.next.lcssa = phi i32 [ %idx.next, %in.bounds ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp slt i32 %idx.next.lcssa, 2147483647 |
| ; CHECK-NEXT: br i1 [[COND3]], label %main.pseudo.exit, label %exit |
| ; 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, 7 |
| ; 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 !1 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, 7 |
| %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 |
| } |
| |
| ; IV = 0; IV <s MAX_INT; IV += 7; 0 <= Len <= MAX_INT - 6. IRCE is allowed |
| ; because the branch would fail once idx.next == MAX_INT - 1 keeping the |
| ; access in bounds. |
| define void @test_04(i32* %arr, i32* %a_len_ptr) { |
| ; CHECK: @test_04( |
| ; CHECK: loop: |
| ; CHECK: [[IV:%[^ ]+]] = phi i32 |
| ; CHECK: [[IDX_NEXT:%[^ ]+]] = add i32 [[IV]], 7 |
| |
| ; CHECK: main.exit.selector: |
| ; CHECK: [[PSEUDO_PHI:%[^ ]+]] = phi i32 [ [[IDX_NEXT]], %in.bounds ] |
| ; CHECK: [[COND:%[^ ]+]] = icmp slt i32 [[PSEUDO_PHI]], 2147483647 |
| ; CHECK: br i1 [[COND]], label %main.pseudo.exit, label %exit |
| |
| ; CHECK: loop.postloop: |
| ; CHECK: [[IDX_POST:%[^ ]+]] = phi i32 |
| ; CHECK: [[COND_POST:%[^ ]+]] = icmp slt i32 [[IDX_POST]], %exit.mainloop.at |
| ; CHECK: br i1 [[COND_POST]], label %in.bounds.postloop, label %out.of.bounds.loopexit |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !2 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 0, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, 7 |
| %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 |
| } |
| |
| ; IV = 100; IV >s -1; IV -= 7; 0 <= Len <= 50. IRCE is allowed. |
| define void @test_05(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_05( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %len = load i32, i32* %a_len_ptr |
| ; CHECK-NEXT: %exit.preloop.at = add nsw i32 %len, -1 |
| ; CHECK-NEXT: [[COND1:%[^ ]+]] = icmp sgt i32 100, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preloop.preheader, label %preloop.pseudo.exit |
| ; CHECK: loop.preloop.preheader: |
| ; CHECK-NEXT: br label %loop.preloop |
| ; 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, -7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %len |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; 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 ], [ 100, %loop.preloop.preheader ] |
| ; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -7 |
| ; 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: [[COND2:%[^ ]+]] = icmp sgt i32 %idx.next.preloop, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop.preloop, label %preloop.exit.selector |
| ; CHECK: preloop.exit.selector: |
| ; CHECK-NEXT: %idx.next.preloop.lcssa = phi i32 [ %idx.next.preloop, %in.bounds.preloop ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp sgt i32 %idx.next.preloop.lcssa, -1 |
| ; CHECK-NEXT: br i1 [[COND3]], label %preloop.pseudo.exit, label %exit |
| ; CHECK: preloop.pseudo.exit: |
| ; CHECK-NEXT: %idx.preloop.copy = phi i32 [ 100, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: %indvar.end = phi i32 [ 100, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: br label %mainloop |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !0 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 100, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, -7 |
| %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 |
| } |
| |
| ; IV = MAX_INT - 7; IV >u 6; IV -= 7; 10 <= Len <= 50. IRCE is allowed. |
| define void @test_06(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_06( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %len = load i32, i32* %a_len_ptr |
| ; CHECK-NEXT: %exit.preloop.at = add nsw i32 %len, -1 |
| ; CHECK-NEXT: [[COND1:%[^ ]+]] = icmp ugt i32 2147483640, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preloop.preheader, label %preloop.pseudo.exit |
| ; CHECK: loop.preloop.preheader: |
| ; CHECK-NEXT: br label %loop.preloop |
| ; 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, -7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %len |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; CHECK: in.bounds: |
| ; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx |
| ; CHECK-NEXT: store i32 0, i32* %addr |
| ; CHECK-NEXT: %next = icmp ugt i32 %idx.next, 6 |
| ; 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 ], [ 2147483640, %loop.preloop.preheader ] |
| ; CHECK-NEXT: %idx.next.preloop = add i32 %idx.preloop, -7 |
| ; 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 ugt i32 %idx.next.preloop, 6 |
| ; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp ugt i32 %idx.next.preloop, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop.preloop, label %preloop.exit.selector |
| ; CHECK: preloop.exit.selector: |
| ; CHECK-NEXT: %idx.next.preloop.lcssa = phi i32 [ %idx.next.preloop, %in.bounds.preloop ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp ugt i32 %idx.next.preloop.lcssa, 6 |
| ; CHECK-NEXT: br i1 [[COND3]], label %preloop.pseudo.exit, label %exit |
| ; CHECK: preloop.pseudo.exit: |
| ; CHECK-NEXT: %idx.preloop.copy = phi i32 [ 2147483640, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: %indvar.end = phi i32 [ 2147483640, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: br label %mainloop |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !3 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 2147483640, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, -7 |
| %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 ugt i32 %idx.next, 6 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; IV = MAX_INT - 7; IV >u 5; IV -= 7; 10 <= Len <= 50. IRCE is not allowed, |
| ; because we can cross the 0 border. |
| define void @test_07(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_07( |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !3 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 2147483640, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, -7 |
| %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 ugt i32 %idx.next, 5 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| ; IV = MAX_INT; IV >u 6; IV -= 7; 10 <= Len <= 50. IRCE is allowed. |
| define void @test_08(i32* %arr, i32* %a_len_ptr) { |
| |
| ; CHECK: @test_08( |
| ; CHECK: entry: |
| ; CHECK-NEXT: %len = load i32, i32* %a_len_ptr |
| ; CHECK-NEXT: %exit.preloop.at = add nsw i32 %len, -1 |
| ; CHECK-NEXT: [[COND1:%[^ ]+]] = icmp ugt i32 2147483647, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND1]], label %loop.preloop.preheader, label %preloop.pseudo.exit |
| ; CHECK: loop.preloop.preheader: |
| ; CHECK-NEXT: br label %loop.preloop |
| ; 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, -7 |
| ; CHECK-NEXT: %abc = icmp slt i32 %idx, %len |
| ; CHECK-NEXT: br i1 true, label %in.bounds, label %out.of.bounds.loopexit1 |
| ; CHECK: in.bounds: |
| ; CHECK-NEXT: %addr = getelementptr i32, i32* %arr, i32 %idx |
| ; CHECK-NEXT: store i32 0, i32* %addr |
| ; CHECK-NEXT: %next = icmp ugt i32 %idx.next, 6 |
| ; 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, -7 |
| ; 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 ugt i32 %idx.next.preloop, 6 |
| ; CHECK-NEXT: [[COND2:%[^ ]+]] = icmp ugt i32 %idx.next.preloop, %exit.preloop.at |
| ; CHECK-NEXT: br i1 [[COND2]], label %loop.preloop, label %preloop.exit.selector |
| ; CHECK: preloop.exit.selector: |
| ; CHECK-NEXT: %idx.next.preloop.lcssa = phi i32 [ %idx.next.preloop, %in.bounds.preloop ] |
| ; CHECK-NEXT: [[COND3:%[^ ]+]] = icmp ugt i32 %idx.next.preloop.lcssa, 6 |
| ; CHECK-NEXT: br i1 [[COND3]], label %preloop.pseudo.exit, label %exit |
| ; CHECK: preloop.pseudo.exit: |
| ; CHECK-NEXT: %idx.preloop.copy = phi i32 [ 2147483647, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: %indvar.end = phi i32 [ 2147483647, %entry ], [ %idx.next.preloop.lcssa, %preloop.exit.selector ] |
| ; CHECK-NEXT: br label %mainloop |
| |
| entry: |
| %len = load i32, i32* %a_len_ptr, !range !3 |
| br label %loop |
| |
| loop: |
| %idx = phi i32 [ 2147483647, %entry ], [ %idx.next, %in.bounds ] |
| %idx.next = add i32 %idx, -7 |
| %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 ugt i32 %idx.next, 6 |
| br i1 %next, label %loop, label %exit |
| |
| out.of.bounds: |
| ret void |
| |
| exit: |
| ret void |
| } |
| |
| !0 = !{i32 0, i32 50} |
| !1 = !{i32 0, i32 2147483640} |
| !2 = !{i32 0, i32 2147483641} |
| !3 = !{i32 10, i32 50} |