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| ; RUN: opt < %s -callsite-splitting -verify-dom-info -S | FileCheck %s
;CHECK-LABEL: @caller
;CHECK-LABEL: Top.split:
;CHECK: %ca1 = musttail call i8* @callee(i8* null, i8* %b)
;CHECK: %cb2 = bitcast i8* %ca1 to i8*
;CHECK: ret i8* %cb2
;CHECK-LABEL: TBB.split
;CHECK: %ca3 = musttail call i8* @callee(i8* nonnull %a, i8* null)
;CHECK: %cb4 = bitcast i8* %ca3 to i8*
;CHECK: ret i8* %cb4
define i8* @caller(i8* %a, i8* %b) {
Top:
%c = icmp eq i8* %a, null
br i1 %c, label %Tail, label %TBB
TBB:
%c2 = icmp eq i8* %b, null
br i1 %c2, label %Tail, label %End
Tail:
%ca = musttail call i8* @callee(i8* %a, i8* %b)
%cb = bitcast i8* %ca to i8*
ret i8* %cb
End:
ret i8* null
}
define i8* @callee(i8* %a, i8* %b) noinline {
ret i8* %a
}
;CHECK-LABEL: @no_cast_caller
;CHECK-LABEL: Top.split:
;CHECK: %ca1 = musttail call i8* @callee(i8* null, i8* %b)
;CHECK: ret i8* %ca1
;CHECK-LABEL: TBB.split
;CHECK: %ca2 = musttail call i8* @callee(i8* nonnull %a, i8* null)
;CHECK: ret i8* %ca2
define i8* @no_cast_caller(i8* %a, i8* %b) {
Top:
%c = icmp eq i8* %a, null
br i1 %c, label %Tail, label %TBB
TBB:
%c2 = icmp eq i8* %b, null
br i1 %c2, label %Tail, label %End
Tail:
%ca = musttail call i8* @callee(i8* %a, i8* %b)
ret i8* %ca
End:
ret i8* null
}
;CHECK-LABEL: @void_caller
;CHECK-LABEL: Top.split:
;CHECK: musttail call void @void_callee(i8* null, i8* %b)
;CHECK: ret void
;CHECK-LABEL: TBB.split
;CHECK: musttail call void @void_callee(i8* nonnull %a, i8* null)
;CHECK: ret void
define void @void_caller(i8* %a, i8* %b) {
Top:
%c = icmp eq i8* %a, null
br i1 %c, label %Tail, label %TBB
TBB:
%c2 = icmp eq i8* %b, null
br i1 %c2, label %Tail, label %End
Tail:
musttail call void @void_callee(i8* %a, i8* %b)
ret void
End:
ret void
}
define void @void_callee(i8* %a, i8* %b) noinline {
ret void
}
; Include a test with a larger CFG that exercises the DomTreeUpdater
; machinery a bit more.
;CHECK-LABEL: @larger_cfg_caller
;CHECK-LABEL: Top.split:
;CHECK: %r1 = musttail call i8* @callee(i8* null, i8* %b)
;CHECK: ret i8* %r1
;CHECK-LABEL: TBB.split
;CHECK: %r2 = musttail call i8* @callee(i8* nonnull %a, i8* null)
;CHECK: ret i8* %r2
define i8* @larger_cfg_caller(i8* %a, i8* %b) {
Top:
%cond1 = icmp eq i8* %a, null
br i1 %cond1, label %Tail, label %ExtraTest
ExtraTest:
%a0 = load i8, i8* %a
%cond2 = icmp eq i8 %a0, 0
br i1 %cond2, label %TBB_pred, label %End
TBB_pred:
br label %TBB
TBB:
%cond3 = icmp eq i8* %b, null
br i1 %cond3, label %Tail, label %End
Tail:
%r = musttail call i8* @callee(i8* %a, i8* %b)
ret i8* %r
End:
ret i8* null
}
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