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