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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
; RUN: opt -S -passes=attributor -aa-pipeline='basic-aa' -attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=2 < %s | FileCheck %s
; PR5596
; IPSCCP should propagate the 0 argument, eliminate the switch, and propagate
; the result.
; FIXME: Remove obsolete calls/instructions
define i32 @main() noreturn nounwind {
; CHECK-LABEL: define {{[^@]+}}@main()
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CALL2:%.*]] = tail call i32 @wwrite(i64 0)
; CHECK-NEXT: ret i32 123
;
entry:
%call2 = tail call i32 @wwrite(i64 0) nounwind
ret i32 %call2
}
define internal i32 @wwrite(i64 %i) nounwind readnone {
; CHECK-LABEL: define {{[^@]+}}@wwrite
; CHECK-SAME: (i64 [[I:%.*]])
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i64 0, label [[SW_DEFAULT:%.*]] [
; CHECK-NEXT: i64 3, label [[RETURN:%.*]]
; CHECK-NEXT: i64 10, label [[RETURN]]
; CHECK-NEXT: ]
; CHECK: sw.default:
; CHECK-NEXT: ret i32 123
; CHECK: return:
; CHECK-NEXT: unreachable
;
entry:
switch i64 %i, label %sw.default [
i64 3, label %return
i64 10, label %return
]
sw.default:
ret i32 123
return:
ret i32 0
}
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