Add a new pass "inductive range check elimination"

[oota-llvm.git] / test / Transforms / IRCE / multiple-access-no-preloop.ll

diff --git a/test/Transforms/IRCE/multiple-access-no-preloop.ll b/test/Transforms/IRCE/multiple-access-no-preloop.ll
new file mode 100644 (file)
index 0000000..56b7b7b
--- /dev/null
+++ b/test/Transforms/IRCE/multiple-access-no-preloop.ll
@@ -0,0 +1,59 @@
+; RUN: opt -irce -S < %s | FileCheck %s
+
+define void @multiple_access_no_preloop(
+    i32* %arr_a, i32* %a_len_ptr, i32* %arr_b, i32* %b_len_ptr, i32 %n) {
+
+ entry:
+  %len.a = load i32* %a_len_ptr, !range !0
+  %len.b = load i32* %b_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.b ]
+  %idx.next = add i32 %idx, 1
+  %abc.a = icmp slt i32 %idx, %len.a
+  br i1 %abc.a, label %in.bounds.a, label %out.of.bounds
+
+ in.bounds.a:
+  %addr.a = getelementptr i32* %arr_a, i32 %idx
+  store i32 0, i32* %addr.a
+  %abc.b = icmp slt i32 %idx, %len.b
+  br i1 %abc.b, label %in.bounds.b, label %out.of.bounds
+
+ in.bounds.b:
+  %addr.b = getelementptr i32* %arr_b, i32 %idx
+  store i32 -1, i32* %addr.b
+  %next = icmp slt i32 %idx.next, %n
+  br i1 %next, label %loop, label %exit
+
+ out.of.bounds:
+  ret void
+
+ exit:
+  ret void
+}
+
+; CHECK-LABEL: multiple_access_no_preloop
+
+; CHECK-LABEL: loop.preheader:
+; CHECK: [[smaller_len_cmp:[^ ]+]] = icmp slt i32 %len.a, %len.b
+; CHECK: [[smaller_len:[^ ]+]] = select i1 [[smaller_len_cmp]], i32 %len.a, i32 %len.b
+; CHECK: [[upper_bound_cmp:[^ ]+]] = icmp slt i32 %n, %3
+; CHECK: [[upper_bound:[^ ]+]] = select i1 %5, i32 %n, i32 %3
+
+; CHECK-LABEL: loop:
+; CHECK: br i1 true, label %in.bounds.a, label %out.of.bounds
+
+; CHECK-LABEL: in.bounds.a:
+; CHECK: br i1 true, label %in.bounds.b, label %out.of.bounds
+
+; CHECK-LABEL: in.bounds.b:
+; CHECK: [[main_loop_cond:[^ ]+]] = icmp slt i32 %idx.next, [[upper_bound]]
+; CHECK: br i1 [[main_loop_cond]], label %loop, label %main.exit.selector
+
+; CHECK-LABEL: in.bounds.b.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}