Update aosp/master LLVM for rebase to r230699.

Change-Id: I2b5be30509658cb8266be782de0ab24f9099f9b9

1 files changed, 43 insertions, 0 deletions

diff --git a/test/Transforms/IRCE/decrementing-loop.ll b/test/Transforms/IRCE/decrementing-loop.ll
new file mode 100644
index 0000000..877a2c2
--- /dev/null
+++ b/test/Transforms/IRCE/decrementing-loop.ll
@@ -0,0 +1,43 @@
+; RUN: opt -irce -S < %s | FileCheck %s
+
+define void @decrementing_loop(i32 *%arr, i32 *%a_len_ptr, i32 %n) {
+ entry:
+  %len = load i32* %a_len_ptr, !range !0
+  %first.itr.check = icmp sgt i32 %n, 0
+  %start = sub i32 %n, 1
+  br i1 %first.itr.check, label %loop, label %exit
+
+ loop:
+  %idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ]
+  %idx.dec = sub i32 %idx, 1
+  %abc.high = icmp slt i32 %idx, %len
+  %abc.low = icmp sge i32 %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 %idx
+  store i32 0, i32* %addr
+  %next = icmp sgt i32 %idx.dec, -1
+  br i1 %next, label %loop, label %exit
+
+ out.of.bounds:
+  ret void
+
+ exit:
+  ret void
+
+; CHECK: loop.preheader:
+; CHECK:   [[indvar_start:[^ ]+]] = add i32 %n, -1
+; CHECK:   [[not_len:[^ ]+]] = sub i32 -1, %len
+; CHECK:   [[not_n:[^ ]+]] = sub i32 -1, %n
+; CHECK:   [[not_len_hiclamp_cmp:[^ ]+]] = icmp sgt i32 [[not_len]], [[not_n]]
+; CHECK:   [[not_len_hiclamp:[^ ]+]] = select i1 [[not_len_hiclamp_cmp]], i32 [[not_len]], i32 [[not_n]]
+; CHECK:   [[len_hiclamp:[^ ]+]] = sub i32 -1, [[not_len_hiclamp]]
+; CHECK:   [[not_exit_preloop_at_cmp:[^ ]+]] = icmp sgt i32 [[len_hiclamp]], 0
+; CHECK:   [[not_exit_preloop_at:[^ ]+]] = select i1 [[not_exit_preloop_at_cmp]], i32 [[len_hiclamp]], i32 0
+; CHECK:   %exit.preloop.at = add i32 [[not_exit_preloop_at]], -1
+}
+
+!0 = !{i32 0, i32 2147483647}
+!1 = !{!"branch_weights", i32 64, i32 4}