53 lines
1.3 KiB
LLVM
53 lines
1.3 KiB
LLVM
; Test that if an invoked function is inlined, and if that function cannot
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; throw, that the dead handler is now unreachable.
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; RUN: opt < %s -inline -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
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declare void @might_throw()
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define internal i32 @callee() personality i32 (...)* @__gxx_personality_v0 {
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enrty:
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invoke void @might_throw()
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to label %cont unwind label %exc
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cont:
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ret i32 0
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exc:
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%exn = landingpad {i8*, i32}
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cleanup
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ret i32 1
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}
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; caller returns true if might_throw throws an exception... callee cannot throw.
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define i32 @caller() personality i32 (...)* @__gxx_personality_v0 {
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; CHECK-LABEL: define i32 @caller() personality i32 (...)* @__gxx_personality_v0
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enrty:
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%X = invoke i32 @callee()
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to label %cont unwind label %UnreachableExceptionHandler
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; CHECK-NOT: @callee
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; CHECK: invoke void @might_throw()
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; CHECK: to label %[[C:.*]] unwind label %[[E:.*]]
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; CHECK: [[E]]:
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; CHECK: landingpad
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; CHECK: cleanup
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; CHECK: br label %[[C]]
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cont:
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; CHECK: [[C]]:
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ret i32 %X
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; CHECK: %[[PHI:.*]] = phi i32
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; CHECK: ret i32 %[[PHI]]
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UnreachableExceptionHandler:
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; CHECK-NOT: UnreachableExceptionHandler:
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%exn = landingpad {i8*, i32}
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cleanup
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ret i32 -1
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; CHECK-NOT: ret i32 -1
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}
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; CHECK: }
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declare i32 @__gxx_personality_v0(...)
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