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Add support for the Objective-C personality function to the instruction
combining of the landingpad instruction. The ObjC personality function acts almost identically to the C++ personality function. In particular, it uses "null" as a "catch-all" value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142256 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1414,7 +1414,8 @@ Instruction *InstCombiner::visitExtractValueInst(ExtractValueInst &EV) {
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enum Personality_Type {
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Unknown_Personality,
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GNU_Ada_Personality,
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GNU_CXX_Personality
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GNU_CXX_Personality,
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GNU_ObjC_Personality
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};
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/// RecognizePersonality - See if the given exception handling personality
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@ -1426,7 +1427,8 @@ static Personality_Type RecognizePersonality(Value *Pers) {
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return Unknown_Personality;
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return StringSwitch<Personality_Type>(F->getName())
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.Case("__gnat_eh_personality", GNU_Ada_Personality)
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.Case("__gxx_personality_v0", GNU_CXX_Personality)
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.Case("__gxx_personality_v0", GNU_CXX_Personality)
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.Case("__objc_personality_v0", GNU_ObjC_Personality)
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.Default(Unknown_Personality);
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}
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@ -1440,6 +1442,7 @@ static bool isCatchAll(Personality_Type Personality, Constant *TypeInfo) {
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// match foreign exceptions (or didn't, before gcc-4.7).
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return false;
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case GNU_CXX_Personality:
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case GNU_ObjC_Personality:
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return TypeInfo->isNullValue();
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}
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llvm_unreachable("Unknown personality!");
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@ -6,6 +6,7 @@
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declare i32 @generic_personality(i32, i64, i8*, i8*)
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declare i32 @__gxx_personality_v0(i32, i64, i8*, i8*)
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declare i32 @__objc_personality_v0(i32, i64, i8*, i8*)
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declare void @bar()
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@ -179,3 +180,54 @@ lpad.d:
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; CHECK-NEXT: null
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; CHECK-NEXT: unreachable
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}
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define void @foo_objc() {
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; CHECK: @foo_objc
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invoke void @bar()
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to label %cont.a unwind label %lpad.a
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cont.a:
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invoke void @bar()
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to label %cont.b unwind label %lpad.b
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cont.b:
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invoke void @bar()
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to label %cont.c unwind label %lpad.c
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cont.c:
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invoke void @bar()
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to label %cont.d unwind label %lpad.d
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cont.d:
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ret void
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lpad.a:
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%a = landingpad { i8*, i32 } personality i32 (i32, i64, i8*, i8*)* @__objc_personality_v0
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catch i32* null
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catch i32* @T1
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unreachable
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; CHECK: %a = landingpad
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; CHECK-NEXT: null
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; CHECK-NEXT: unreachable
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lpad.b:
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%b = landingpad { i8*, i32 } personality i32 (i32, i64, i8*, i8*)* @__objc_personality_v0
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filter [1 x i32*] zeroinitializer
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unreachable
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; CHECK: %b = landingpad
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: unreachable
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lpad.c:
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%c = landingpad { i8*, i32 } personality i32 (i32, i64, i8*, i8*)* @__objc_personality_v0
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filter [2 x i32*] [i32* @T1, i32* null]
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unreachable
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; CHECK: %c = landingpad
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; CHECK-NEXT: cleanup
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; CHECK-NEXT: unreachable
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lpad.d:
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%d = landingpad { i8*, i32 } personality i32 (i32, i64, i8*, i8*)* @__objc_personality_v0
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cleanup
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catch i32* null
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unreachable
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; CHECK: %d = landingpad
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; CHECK-NEXT: null
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; CHECK-NEXT: unreachable
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}
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