From e1fd20172bdceb13393461075c5b3d2f43af76f1 Mon Sep 17 00:00:00 2001
From: Hongbin Zheng <etherzhhb@gmail.com>
Date: Wed, 4 Apr 2012 13:24:40 +0000
Subject: [PATCH] Add testcase for r154007, when a function has the optsize
 attribute,   the loop should be unrolled according the value of
 OptSizeUnrollThreshold.

llvm-svn: 154014
---
 .../LoopUnroll/partial-unroll-optsize.ll      | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 llvm/test/Transforms/LoopUnroll/partial-unroll-optsize.ll

diff --git a/llvm/test/Transforms/LoopUnroll/partial-unroll-optsize.ll b/llvm/test/Transforms/LoopUnroll/partial-unroll-optsize.ll
new file mode 100644
index 000000000000..3179d55e978a
--- /dev/null
+++ b/llvm/test/Transforms/LoopUnroll/partial-unroll-optsize.ll
@@ -0,0 +1,35 @@
+; RUN: opt < %s -S -loop-unroll -unroll-allow-partial | FileCheck %s
+; Loop size = 3, when the function has the optsize attribute, the
+; OptSizeUnrollThreshold, i.e. 50, is used, hence the loop should be unrolled
+; by 16 times because 3 * 16 < 50.
+define void @unroll_opt_for_size() nounwind optsize {
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry ], [ %inc, %loop ]
+  %inc = add i32 %iv, 1
+  %exitcnd = icmp uge i32 %inc, 1024
+  br i1 %exitcnd, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+; CHECK:      add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: add
+; CHECK-NEXT: icmp