derek.holloway
7502bf64a4
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81 lines
2.0 KiB
LLVM
81 lines
2.0 KiB
LLVM
; RUN: opt < %s -passes=callsite-splitting -verify-dom-info -S | FileCheck %s
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define ptr @callee(ptr %a, ptr %b) noinline {
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ret ptr %a
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}
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;CHECK-LABEL: @no_cast_caller
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;CHECK-LABEL: Top.split:
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;CHECK: %ca1 = musttail call ptr @callee(ptr null, ptr %b)
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;CHECK: ret ptr %ca1
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;CHECK-LABEL: TBB.split
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;CHECK: %ca2 = musttail call ptr @callee(ptr nonnull %a, ptr null)
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;CHECK: ret ptr %ca2
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define ptr @no_cast_caller(ptr %a, ptr %b) {
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Top:
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%c = icmp eq ptr %a, null
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br i1 %c, label %Tail, label %TBB
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TBB:
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%c2 = icmp eq ptr %b, null
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br i1 %c2, label %Tail, label %End
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Tail:
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%ca = musttail call ptr @callee(ptr %a, ptr %b)
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ret ptr %ca
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End:
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ret ptr null
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}
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;CHECK-LABEL: @void_caller
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;CHECK-LABEL: Top.split:
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;CHECK: musttail call void @void_callee(ptr null, ptr %b)
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;CHECK: ret void
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;CHECK-LABEL: TBB.split
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;CHECK: musttail call void @void_callee(ptr nonnull %a, ptr null)
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;CHECK: ret void
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define void @void_caller(ptr %a, ptr %b) {
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Top:
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%c = icmp eq ptr %a, null
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br i1 %c, label %Tail, label %TBB
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TBB:
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%c2 = icmp eq ptr %b, null
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br i1 %c2, label %Tail, label %End
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Tail:
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musttail call void @void_callee(ptr %a, ptr %b)
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ret void
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End:
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ret void
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}
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define void @void_callee(ptr %a, ptr %b) noinline {
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ret void
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}
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; Include a test with a larger CFG that exercises the DomTreeUpdater
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; machinery a bit more.
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;CHECK-LABEL: @larger_cfg_caller
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;CHECK-LABEL: Top.split:
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;CHECK: %r1 = musttail call ptr @callee(ptr null, ptr %b)
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;CHECK: ret ptr %r1
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;CHECK-LABEL: TBB.split
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;CHECK: %r2 = musttail call ptr @callee(ptr nonnull %a, ptr null)
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;CHECK: ret ptr %r2
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define ptr @larger_cfg_caller(ptr %a, ptr %b) {
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Top:
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%cond1 = icmp eq ptr %a, null
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br i1 %cond1, label %Tail, label %ExtraTest
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ExtraTest:
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%a0 = load i8, ptr %a
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%cond2 = icmp eq i8 %a0, 0
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br i1 %cond2, label %TBB_pred, label %End
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TBB_pred:
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br label %TBB
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TBB:
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%cond3 = icmp eq ptr %b, null
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br i1 %cond3, label %Tail, label %End
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Tail:
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%r = musttail call ptr @callee(ptr %a, ptr %b)
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ret ptr %r
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End:
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ret ptr null
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}
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