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|
; RUN: llc -mtriple=x86_64-unknown-windows-msvc -o - %s | FileCheck %s
define dso_local void @no_epilog() local_unnamed_addr {
entry:
ret void
}
; CHECK-LABEL: no_epilog:
; CHECK-NOT: .seh_
; CHECK: retq
define dso_local void @stack_alloc_no_pushes() local_unnamed_addr {
entry:
call void @a()
ret void
}
; CHECK-LABEL: stack_alloc_no_pushes:
; CHECK: .seh_unwindversion 2
; CHECK-NOT: .seh_pushreg
; CHECK: .seh_stackalloc
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: retq
define dso_local i32 @stack_alloc_and_pushes(i32 %x) local_unnamed_addr {
entry:
%call = tail call i32 @c(i32 %x)
%call1 = tail call i32 @c(i32 %x)
%add = add nsw i32 %call1, %call
%call2 = tail call i32 @c(i32 %x)
%call3 = tail call i32 @c(i32 %call2)
%add4 = add nsw i32 %add, %call3
ret i32 %add4
}
; CHECK-LABEL: stack_alloc_and_pushes:
; CHECK: .seh_unwindversion 2
; CHECK: .seh_pushreg %rsi
; CHECK: .seh_pushreg %rdi
; CHECK: .seh_pushreg %rbx
; CHECK: .seh_stackalloc
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: popq %rdi
; CHECK-NEXT: popq %rsi
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: retq
define dso_local i32 @tail_call(i32 %x) local_unnamed_addr {
entry:
%call = tail call i32 @c(i32 %x)
%call1 = tail call i32 @c(i32 %call)
ret i32 %call1
}
; CHECK-LABEL: tail_call:
; CHECK: .seh_unwindversion 2
; CHECK-NOT: .seh_pushreg
; CHECK: .seh_stackalloc
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: jmp
define dso_local i32 @multiple_epilogs(i32 %x) local_unnamed_addr {
entry:
%call = tail call i32 @c(i32 noundef %x)
%cmp = icmp sgt i32 %call, 0
br i1 %cmp, label %if.then, label %if.else
if.then:
%call1 = tail call i32 @c(i32 noundef %call)
ret i32 %call1
if.else:
%call2 = tail call i32 @b()
ret i32 %call2
}
; CHECK-LABEL: multiple_epilogs:
; CHECK: .seh_unwindversion 2
; CHECK-NOT: .seh_pushreg
; CHECK: .seh_stackalloc
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: jmp
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: jmp
define dso_local i32 @mismatched_terminators() local_unnamed_addr {
entry:
%call = tail call i32 @b()
%cmp = icmp sgt i32 %call, 0
br i1 %cmp, label %if.then, label %if.else
if.then:
%call1 = tail call i32 @b()
ret i32 %call1
if.else:
ret i32 %call
}
; CHECK-LABEL: mismatched_terminators:
; CHECK: .seh_unwindversion 2
; CHECK-NOT: .seh_pushreg
; CHECK: .seh_stackalloc
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: jmp
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: addq
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: ret
define dso_local void @dynamic_stack_alloc(i32 %x) local_unnamed_addr {
entry:
%y = alloca i32, i32 %x
ret void
}
; CHECK-LABEL: dynamic_stack_alloc:
; CHECK: .seh_unwindversion 2
; CHECK: .seh_pushreg %rbp
; CHECK: .seh_setframe %rbp, 0
; CHECK: .seh_endprologue
; CHECK-NOT: .seh_endproc
; CHECK: .seh_startepilogue
; CHECK-NEXT: movq %rbp, %rsp
; CHECK-NEXT: .seh_unwindv2start
; CHECK-NEXT: popq %rbp
; CHECK-NEXT: .seh_endepilogue
; CHECK-NEXT: retq
; CHECK-NEXT: .seh_endproc
declare void @a() local_unnamed_addr
declare i32 @b() local_unnamed_addr
declare i32 @c(i32) local_unnamed_addr
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"winx64-eh-unwindv2", i32 1}
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