test/CodeGen/XCore/exception.ll

; RUN: llc < %s -march=xcore | FileCheck %s

declare void @g()
declare i32 @__gxx_personality_v0(...)
declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare i8* @__cxa_allocate_exception(i32)
declare void @__cxa_throw(i8*, i8*, i8*)

@_ZTIi = external constant i8*
@_ZTId = external constant i8*

; CHECK-LABEL: fn_typeid:
; CHECK: .cfi_startproc
; CHECK: mkmsk r0, 1
; CHECK: retsp 0
; CHECK: .cfi_endproc
define i32 @fn_typeid() {
entry:
  %0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind
  ret i32 %0
}

; CHECK-LABEL: fn_throw
; CHECK: .cfi_startproc
; CHECK: entsp 1
; CHECK: .cfi_def_cfa_offset 4
; CHECK: .cfi_offset 15, 0
; CHECK: ldc r0, 4
; CHECK: bl __cxa_allocate_exception
; CHECK: ldaw r11, cp[_ZTIi]
; CHECK: ldc r2, 0
; CHECK: mov r1, r11
; CHECK: bl __cxa_throw
define void @fn_throw() {
entry:
  %0 = call i8* @__cxa_allocate_exception(i32 4) nounwind
  call void @__cxa_throw(i8* %0, i8* bitcast (i8** @_ZTIi to i8*), i8* null) noreturn
  unreachable
}

; CHECK-LABEL: fn_catch
; CHECK: .cfi_startproc
; CHECK: .cfi_personality 0, __gxx_personality_v0
; CHECK: [[START:.L[a-zA-Z0-9_]+]]
; CHECK: .cfi_lsda 0, [[LSDA:.L[a-zA-Z0-9_]+]]
; CHECK: entsp 4
; CHECK: .cfi_def_cfa_offset 16
; CHECK: .cfi_offset 15, 0
define void @fn_catch() {
entry:

; N.B. we alloc no variables, hence force compiler to spill
; CHECK: stw r4, sp[3]
; CHECK: .cfi_offset 4, -4
; CHECK: stw r5, sp[2]
; CHECK: .cfi_offset 5, -8
; CHECK: stw r6, sp[1]
; CHECK: .cfi_offset 6, -12
; CHECK: [[PRE_G:.L[a-zA-Z0-9_]+]]
; CHECK: bl g
; CHECK: [[POST_G:.L[a-zA-Z0-9_]+]]
; CHECK: [[RETURN:.L[a-zA-Z0-9_]+]]
; CHECK: ldw r6, sp[1]
; CHECK: ldw r5, sp[2]
; CHECK: ldw r4, sp[3]
; CHECK: retsp 4
  invoke void @g() to label %cont unwind label %lpad
cont:
  ret void

; CHECK: {{.L[a-zA-Z0-9_]+}}
; CHECK: [[LANDING:.L[a-zA-Z0-9_]+]]
; CHECK: mov r5, r1
; CHECK: mov r4, r0
; CHECK: bl __cxa_begin_catch
; CHECK: ldw r6, r0[0]
; CHECK: bl __cxa_end_catch
lpad:
  %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
          catch i8* bitcast (i8** @_ZTIi to i8*)
          catch i8* bitcast (i8** @_ZTId to i8*)
  %1 = extractvalue { i8*, i32 } %0, 0
  %2 = extractvalue { i8*, i32 } %0, 1
  %3 = call i8* @__cxa_begin_catch(i8* %1) nounwind
  %4 = bitcast i8* %3 to i32*
  %5 = load i32* %4
  call void @__cxa_end_catch() nounwind

; CHECK: eq r0, r6, r5
; CHECK: bf r0, [[RETURN]]
; CHECK: mov r0, r4
; CHECK: bl _Unwind_Resume
; CHECK: .cfi_endproc
; CHECK: [[END:.L[a-zA-Z0-9_]+]]
  %6 = icmp eq i32 %5, %2
  br i1 %6, label %Resume, label %Exit
Resume:
  resume { i8*, i32 } %0
Exit:
  ret void
}

; CHECK: [[LSDA]]:
; CHECK: .byte  255
; CHECK: .byte  0
; CHECK: .asciiz
; CHECK: .byte  3
; CHECK: .byte  26
; CHECK: [[SET0:.L[a-zA-Z0-9_]+]] = [[PRE_G]]-[[START]]
; CHECK: .long [[SET0]]
; CHECK: [[SET1:.L[a-zA-Z0-9_]+]] = [[POST_G]]-[[PRE_G]]
; CHECK: .long [[SET1]]
; CHECK: [[SET2:.L[a-zA-Z0-9_]+]] = [[LANDING]]-[[START]]
; CHECK: .long [[SET2]]
; CHECK: .byte 3
; CHECK: [[SET3:.L[a-zA-Z0-9_]+]] = [[POST_G]]-[[START]]
; CHECK: .long [[SET3]]
; CHECK: [[SET4:.L[a-zA-Z0-9_]+]] = [[END]]-[[POST_G]]
; CHECK: .long [[SET4]]
; CHECK: .long 0
; CHECK: .byte 0
; CHECK: .byte 1
; CHECK: .byte 0
; CHECK: .byte 2
; CHECK: .byte 125
; CHECK: .long _ZTIi
; CHECK: .long _ZTId