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34 lines
796 B
LLVM
34 lines
796 B
LLVM
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; RUN: opt < %s -lint -disable-output 2>&1 | FileCheck %s
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%s = type { i8 }
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declare void @f1(%s*)
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define void @f2() {
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entry:
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%c = alloca %s
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tail call void @f1(%s* %c)
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ret void
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}
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; Lint should complain about the tail call passing the alloca'd value %c to f1.
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; CHECK: Undefined behavior: Call with "tail" keyword references alloca
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; CHECK-NEXT: tail call void @f1(%s* %c)
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declare void @f3(%s* byval)
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define void @f4() {
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entry:
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%c = alloca %s
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tail call void @f3(%s* byval %c)
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ret void
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}
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; Lint should not complain about passing the alloca'd %c since it's passed
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; byval, effectively copying the data to the stack instead of leaking the
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; pointer itself.
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; CHECK-NOT: Undefined behavior: Call with "tail" keyword references alloca
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; CHECK-NOT: tail call void @f3(%s* byval %c)
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