improve optimization of invoke instructions:
- simplifycfg: invoke undef/null -> unreachable
- instcombine: invoke new -> invoke expect(0, 0) (an arbitrary NOOP intrinsic; only done if the allocated memory is unused, of course)
- verifier: allow invoke of intrinsics (to make the previous step work)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159146 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/SimplifyCFG/invoke.ll b/test/Transforms/SimplifyCFG/invoke.ll
new file mode 100644
index 0000000..c9169d4
--- /dev/null
+++ b/test/Transforms/SimplifyCFG/invoke.ll
@@ -0,0 +1,45 @@
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+
+declare i32 @__gxx_personality_v0(...)
+declare void @__cxa_call_unexpected(i8*)
+declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
+
+
+; CHECK: @f1
+define i8* @f1() nounwind uwtable ssp {
+entry:
+; CHECK: call void @llvm.trap()
+; CHECK: unreachable
+ %call = invoke noalias i8* undef()
+ to label %invoke.cont unwind label %lpad
+
+invoke.cont:
+ ret i8* %call
+
+lpad:
+ %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+ filter [0 x i8*] zeroinitializer
+ %1 = extractvalue { i8*, i32 } %0, 0
+ tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
+ unreachable
+}
+
+; CHECK: @f2
+define i8* @f2() nounwind uwtable ssp {
+entry:
+; CHECK: call void @llvm.trap()
+; CHECK: unreachable
+ %call = invoke noalias i8* null()
+ to label %invoke.cont unwind label %lpad
+
+invoke.cont:
+ ret i8* %call
+
+lpad:
+ %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+ filter [0 x i8*] zeroinitializer
+ %1 = extractvalue { i8*, i32 } %0, 0
+ tail call void @__cxa_call_unexpected(i8* %1) noreturn nounwind
+ unreachable
+}