From: Hans Wennborg <hans@hanshq.net>
Date: Thu, 4 Dec 2014 22:19:28 +0000 (+0000)
Subject: Add some tests for SimplifyCFG's TurnSwitchRangeIntoICmp(). NFC.
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=76b1313e75a594f3a5e128fff2c2fa1a1d339309;hp=8de6d3e5105e2d4c0db899996606c7eb81a07e22

Add some tests for SimplifyCFG's TurnSwitchRangeIntoICmp(). NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223396 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll b/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll
new file mode 100644
index 00000000000..8bf2b04520b
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll
@@ -0,0 +1,50 @@
+; RUN: opt %s -simplifycfg -S | FileCheck %s
+
+declare i32 @f(i32)
+
+define i32 @basic(i32 %x) {
+; CHECK-LABEL: @basic
+; CHECK: x.off = add i32 %x, -5
+; CHECK: %switch = icmp ult i32 %x.off, 3
+; CHECK: br i1 %switch, label %a, label %default
+
+entry:
+  switch i32 %x, label %default [
+    i32 5, label %a
+    i32 6, label %a
+    i32 7, label %a
+  ]
+default:
+  %0 = call i32 @f(i32 0)
+  ret i32 %0
+a:
+  %1 = call i32 @f(i32 1)
+  ret i32 %1
+}
+
+
+define i32 @unreachable(i32 %x) {
+; CHECK-LABEL: @unreachable
+; CHECK: x.off = add i32 %x, -5
+; CHECK: %switch = icmp ult i32 %x.off, 3
+; CHECK: br i1 %switch, label %a, label %b
+
+entry:
+  switch i32 %x, label %unreachable [
+    i32 5, label %a
+    i32 6, label %a
+    i32 7, label %a
+    i32 10, label %b
+    i32 20, label %b
+    i32 30, label %b
+    i32 40, label %b
+  ]
+unreachable:
+  unreachable
+a:
+  %0 = call i32 @f(i32 0)
+  ret i32 %0
+b:
+  %1 = call i32 @f(i32 1)
+  ret i32 %1
+}