diff options
Diffstat (limited to 'test/Transforms/IRCE/single-access-with-preloop.ll')
| -rw-r--r-- | test/Transforms/IRCE/single-access-with-preloop.ll | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/test/Transforms/IRCE/single-access-with-preloop.ll b/test/Transforms/IRCE/single-access-with-preloop.ll new file mode 100644 index 0000000..16426b8 --- /dev/null +++ b/test/Transforms/IRCE/single-access-with-preloop.ll @@ -0,0 +1,71 @@ +; RUN: opt -irce -S < %s | FileCheck %s + +define void @single_access_with_preloop(i32 *%arr, i32 *%a_len_ptr, i32 %n, i32 %offset) { + entry: + %len = load i32* %a_len_ptr, !range !0 + %first.itr.check = icmp sgt i32 %n, 0 + br i1 %first.itr.check, label %loop, label %exit + + loop: + %idx = phi i32 [ 0, %entry ] , [ %idx.next, %in.bounds ] + %idx.next = add i32 %idx, 1 + %array.idx = add i32 %idx, %offset + %abc.high = icmp slt i32 %array.idx, %len + %abc.low = icmp sge i32 %array.idx, 0 + %abc = and i1 %abc.low, %abc.high + br i1 %abc, label %in.bounds, label %out.of.bounds, !prof !1 + + in.bounds: + %addr = getelementptr i32* %arr, i32 %array.idx + store i32 0, i32* %addr + %next = icmp slt i32 %idx.next, %n + br i1 %next, label %loop, label %exit + + out.of.bounds: + ret void + + exit: + ret void +} + +; CHECK-LABEL: loop.preheader: +; CHECK: [[not_safe_start:[^ ]+]] = add i32 %offset, -1 +; CHECK: [[not_n:[^ ]+]] = sub i32 -1, %n +; CHECK: [[not_exit_preloop_at_cond_loclamp:[^ ]+]] = icmp sgt i32 [[not_safe_start]], [[not_n]] +; CHECK: [[not_exit_preloop_at_loclamp:[^ ]+]] = select i1 [[not_exit_preloop_at_cond_loclamp]], i32 [[not_safe_start]], i32 [[not_n]] +; CHECK: [[exit_preloop_at_loclamp:[^ ]+]] = sub i32 -1, [[not_exit_preloop_at_loclamp]] +; CHECK: [[exit_preloop_at_cond:[^ ]+]] = icmp sgt i32 [[exit_preloop_at_loclamp]], 0 +; CHECK: [[exit_preloop_at:[^ ]+]] = select i1 [[exit_preloop_at_cond]], i32 [[exit_preloop_at_loclamp]], i32 0 + + +; CHECK: [[not_safe_start_2:[^ ]+]] = add i32 %offset, -1 +; CHECK: [[not_safe_end:[^ ]+]] = sub i32 [[not_safe_start_2]], %len +; CHECK: [[not_exit_mainloop_at_cond_loclamp:[^ ]+]] = icmp sgt i32 [[not_safe_end]], [[not_n]] +; CHECK: [[not_exit_mainloop_at_loclamp:[^ ]+]] = select i1 [[not_exit_mainloop_at_cond_loclamp]], i32 [[not_safe_end]], i32 [[not_n]] +; CHECK: [[exit_mainloop_at_loclamp:[^ ]+]] = sub i32 -1, [[not_exit_mainloop_at_loclamp]] +; CHECK: [[exit_mainloop_at_cmp:[^ ]+]] = icmp sgt i32 [[exit_mainloop_at_loclamp]], 0 +; CHECK: [[exit_mainloop_at:[^ ]+]] = select i1 [[exit_mainloop_at_cmp]], i32 [[exit_mainloop_at_loclamp]], i32 0 + + +; CHECK-LABEL: in.bounds: +; CHECK: [[continue_mainloop_cond:[^ ]+]] = icmp slt i32 %idx.next, [[exit_mainloop_at]] +; CHECK: br i1 [[continue_mainloop_cond]], label %loop, label %main.exit.selector + +; CHECK-LABEL: main.exit.selector: +; CHECK: [[mainloop_its_left:[^ ]+]] = icmp slt i32 %idx.next, %n +; CHECK: br i1 [[mainloop_its_left]], label %main.pseudo.exit, label %exit.loopexit + +; CHECK-LABEL: in.bounds.preloop: +; CHECK: [[continue_preloop_cond:[^ ]+]] = icmp slt i32 %idx.next.preloop, [[exit_preloop_at]] +; CHECK: br i1 [[continue_preloop_cond]], label %loop.preloop, label %preloop.exit.selector + +; CHECK-LABEL: preloop.exit.selector: +; CHECK: [[preloop_its_left:[^ ]+]] = icmp slt i32 %idx.next.preloop, %n +; CHECK: br i1 [[preloop_its_left]], label %preloop.pseudo.exit, label %exit.loopexit + +; CHECK-LABEL: in.bounds.postloop: +; CHECK: %next.postloop = icmp slt i32 %idx.next.postloop, %n +; CHECK: br i1 %next.postloop, label %loop.postloop, label %exit.loopexit + +!0 = !{i32 0, i32 2147483647} +!1 = !{!"branch_weights", i32 64, i32 4} |