Add test case for r164850.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164867 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 106 insertions, 0 deletions

diff --git a/test/Transforms/PhaseOrdering/gdce.ll b/test/Transforms/PhaseOrdering/gdce.ll
new file mode 100644
index 0000000000..273e47e97c
--- /dev/null
+++ b/test/Transforms/PhaseOrdering/gdce.ll
@@ -0,0 +1,106 @@
+; RUN: opt -O2 -S %s | FileCheck %s
+
+; Run global DCE to eliminate unused ctor and dtor.
+; rdar://9142819
+
+; CHECK: main
+; CHECK-NOT: _ZN4BaseC1Ev
+; CHECK-NOT: _ZN4BaseD1Ev
+; CHECK-NOT: _ZN4BaseD2Ev
+; CHECK-NOT: _ZN4BaseC2Ev
+; CHECK-NOT: _ZN4BaseD0Ev
+
+%class.Base = type { i32 (...)** }
+
+@_ZTV4Base = linkonce_odr unnamed_addr constant [4 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI4Base to i8*), i8* bitcast (void (%class.Base*)* @_ZN4BaseD1Ev to i8*), i8* bitcast (void (%class.Base*)* @_ZN4BaseD0Ev to i8*)]
+@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
+@_ZTS4Base = linkonce_odr constant [6 x i8] c"4Base\00"
+@_ZTI4Base = linkonce_odr unnamed_addr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([6 x i8]* @_ZTS4Base, i32 0, i32 0) }
+
+define i32 @main() uwtable ssp {
+entry:
+  %retval = alloca i32, align 4
+  %b = alloca %class.Base, align 8
+  %cleanup.dest.slot = alloca i32
+  store i32 0, i32* %retval
+  call void @_ZN4BaseC1Ev(%class.Base* %b)
+  store i32 0, i32* %retval
+  store i32 1, i32* %cleanup.dest.slot
+  call void @_ZN4BaseD1Ev(%class.Base* %b)
+  %0 = load i32* %retval
+  ret i32 %0
+}
+
+define linkonce_odr void @_ZN4BaseC1Ev(%class.Base* %this) unnamed_addr uwtable ssp align 2 {
+entry:
+  %this.addr = alloca %class.Base*, align 8
+  store %class.Base* %this, %class.Base** %this.addr, align 8
+  %this1 = load %class.Base** %this.addr
+  call void @_ZN4BaseC2Ev(%class.Base* %this1)
+  ret void
+}
+
+define linkonce_odr void @_ZN4BaseD1Ev(%class.Base* %this) unnamed_addr uwtable ssp align 2 {
+entry:
+  %this.addr = alloca %class.Base*, align 8
+  store %class.Base* %this, %class.Base** %this.addr, align 8
+  %this1 = load %class.Base** %this.addr
+  call void @_ZN4BaseD2Ev(%class.Base* %this1)
+  ret void
+}
+
+define linkonce_odr void @_ZN4BaseD2Ev(%class.Base* %this) unnamed_addr nounwind uwtable ssp align 2 {
+entry:
+  %this.addr = alloca %class.Base*, align 8
+  store %class.Base* %this, %class.Base** %this.addr, align 8
+  %this1 = load %class.Base** %this.addr
+  ret void
+}
+
+define linkonce_odr void @_ZN4BaseC2Ev(%class.Base* %this) unnamed_addr nounwind uwtable ssp align 2 {
+entry:
+  %this.addr = alloca %class.Base*, align 8
+  store %class.Base* %this, %class.Base** %this.addr, align 8
+  %this1 = load %class.Base** %this.addr
+  %0 = bitcast %class.Base* %this1 to i8***
+  store i8** getelementptr inbounds ([4 x i8*]* @_ZTV4Base, i64 0, i64 2), i8*** %0
+  ret void
+}
+
+define linkonce_odr void @_ZN4BaseD0Ev(%class.Base* %this) unnamed_addr uwtable ssp align 2 {
+entry:
+  %this.addr = alloca %class.Base*, align 8
+  %exn.slot = alloca i8*
+  %ehselector.slot = alloca i32
+  store %class.Base* %this, %class.Base** %this.addr, align 8
+  %this1 = load %class.Base** %this.addr
+  invoke void @_ZN4BaseD1Ev(%class.Base* %this1)
+          to label %invoke.cont unwind label %lpad
+
+invoke.cont:                                      ; preds = %entry
+  %0 = bitcast %class.Base* %this1 to i8*
+  call void @_ZdlPv(i8* %0) nounwind
+  ret void
+
+lpad:                                             ; preds = %entry
+  %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+          cleanup
+  %2 = extractvalue { i8*, i32 } %1, 0
+  store i8* %2, i8** %exn.slot
+  %3 = extractvalue { i8*, i32 } %1, 1
+  store i32 %3, i32* %ehselector.slot
+  %4 = bitcast %class.Base* %this1 to i8*
+  call void @_ZdlPv(i8* %4) nounwind
+  br label %eh.resume
+
+eh.resume:                                        ; preds = %lpad
+  %exn = load i8** %exn.slot
+  %sel = load i32* %ehselector.slot
+  %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn, 0
+  %lpad.val2 = insertvalue { i8*, i32 } %lpad.val, i32 %sel, 1
+  resume { i8*, i32 } %lpad.val2
+}
+
+declare i32 @__gxx_personality_v0(...)
+
+declare void @_ZdlPv(i8*) nounwind