add support for zero initialized unions, patch by Tim Northover!

[oota-llvm.git] / test / Transforms / SimplifyCFG / basictest.ll

diff --git a/test/Transforms/SimplifyCFG/basictest.ll b/test/Transforms/SimplifyCFG/basictest.ll
index c16b1cd6b0791cb62873f98ba27c89593c72c50c..83a9fa7ad1b8da349ba0e1bf8c576c2177efac7e 100644 (file)
--- a/test/Transforms/SimplifyCFG/basictest.ll
+++ b/test/Transforms/SimplifyCFG/basictest.ll
@@ -1,24 +1,59 @@
-; Test CFG simplify removal of branch instructions...
+; Test CFG simplify removal of branch instructions.
 ;
-; RUN: as < %s | opt -simplifycfg | dis | not grep br
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 
+define void @test1() {
+        br label %BB1
+BB1:            ; preds = %0
+        ret void
+; CHECK: @test1
+; CHECK-NEXT: ret void
+}
 
-void "test1"() {
-       br label %BB1
-BB1:
-       ret void
+define void @test2() {
+        ret void
+BB1:            ; No predecessors!
+        ret void
+; CHECK: @test2
+; CHECK-NEXT: ret void
+; CHECK-NEXT: }
 }
 
-void "test2"() {
-       ret void
-BB1:
-       ret void
+define void @test3(i1 %T) {
+        br i1 %T, label %BB1, label %BB1
+BB1:            ; preds = %0, %0
+        ret void
+; CHECK: @test3
+; CHECK-NEXT: ret void
 }
 
-void "test3"(bool %T) {
-       br bool %T, label %BB1, label %BB1
-BB1:
-       ret void
+
+define void @test4() {
+  br label %return
+return:
+  ret void
+; CHECK: @test4
+; CHECK-NEXT: ret void
 }
+@test4g = global i8* blockaddress(@test4, %return)
+
 
+; PR5795
+define void @test5(i32 %A) {
+  switch i32 %A, label %return [
+    i32 2, label %bb
+    i32 10, label %bb1
+  ]
 
+bb:                                               ; preds = %entry
+  ret void
+
+bb1:                                              ; preds = %entry
+  ret void
+
+return:                                           ; preds = %entry
+  ret void
+; CHECK: @test5
+; CHECK-NEXT: bb:
+; CHECK-NEXT: ret void
+}