File: crash-lifetime-marker.ll

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llvm-toolchain-20 1%3A20.1.6-1~exp1
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; RUN: opt < %s -passes=inline -S | FileCheck %s
; RUN: opt < %s -passes='cgscc(inline)' -S | FileCheck %s
; RUN: opt < %s -passes='module-inline' -S | FileCheck %s

; InlineFunction would assert inside the loop that leaves lifetime markers if
; there was an zero-sized AllocaInst. Check that it doesn't assert and doesn't
; leave lifetime markers in that case.

declare i32 @callee2(ptr)

define i32 @callee1(i32 %count) {
  %a0 = alloca i8, i32 %count, align 4
  %call0 = call i32 @callee2(ptr %a0)
  ret i32 %call0
}

; CHECK-LABEL: define i32 @caller1(
; CHECK: [[ALLOCA:%[a-z0-9\.]+]] = alloca i8
; CHECK-NOT: call void @llvm.lifetime.start.p0(
; CHECK: call i32 @callee2(ptr [[ALLOCA]])
; CHECK-NOT: call void @llvm.lifetime.end.p0(

define i32 @caller1(i32 %count) {
  %call0 = call i32 @callee1(i32 0)
  ret i32 %call0
}