[llvm] r223396 - Add some tests for SimplifyCFG's TurnSwitchRangeIntoICmp(). NFC.

[Hans Wennborg]

Author: hans
Date: Thu Dec  4 16:19:28 2014
New Revision: 223396

URL: http://llvm.org/viewvc/llvm-project?rev=223396&view=rev
Log:
Add some tests for SimplifyCFG's TurnSwitchRangeIntoICmp(). NFC.

Added:
    llvm/trunk/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll

Added: llvm/trunk/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll?rev=223396&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll (added)
+++ llvm/trunk/test/Transforms/SimplifyCFG/switch-range-to-icmp.ll Thu Dec  4 16:19:28 2014
@@ -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
+}