derek.holloway
7502bf64a4
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90 lines
2.2 KiB
LLVM
90 lines
2.2 KiB
LLVM
; RUN: opt -S -passes=callsite-splitting -callsite-splitting-duplication-threshold=100000000 < %s | FileCheck -enable-var-scope %s
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; Convergent calls should not be duplicated in this case
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; CHECK-LABEL: define void @convergent_caller(
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; CHECK: call void @convergent_callee(
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; CHECK-NOT: call void @convergent_callee(
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define void @convergent_caller(i1 %c, ptr %a_elt, ptr %b_elt) #0 {
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entry:
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br label %Top
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Top:
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%tobool1 = icmp eq ptr %a_elt, null
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br i1 %tobool1, label %CallSiteBB, label %NextCond
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NextCond:
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%cmp = icmp ne ptr %b_elt, null
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br i1 %cmp, label %CallSiteBB, label %End
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CallSiteBB:
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%p = phi i1 [ false, %Top ], [ %c, %NextCond ]
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call void @convergent_callee(ptr %a_elt, i1 %p)
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br label %End
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End:
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ret void
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}
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; CHECK-LABEL: define void @convergent_callee(
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; CHECK: call void @convergent_external(
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; CHECK-NOT: call void @convergent_external(
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define void @convergent_callee(ptr %a_elt, i1 %c) #0 {
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entry:
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%tobool = icmp ne ptr %a_elt, null
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br i1 %tobool, label %then, label %endif
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then:
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br label %endif
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endif:
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call void @convergent_external(ptr %a_elt) #0
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ret void
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}
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; Make sure an otherwise identical function is transformed
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; CHECK-LABEL: define void @reference_caller(
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; CHECK: call void @nonconvergent_callee(
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; CHECK: call void @nonconvergent_callee(
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define void @reference_caller(i1 %c, ptr %a_elt, ptr %b_elt) #1 {
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entry:
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br label %Top
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Top:
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%tobool1 = icmp eq ptr %a_elt, null
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br i1 %tobool1, label %CallSiteBB, label %NextCond
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NextCond:
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%cmp = icmp ne ptr %b_elt, null
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br i1 %cmp, label %CallSiteBB, label %End
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CallSiteBB:
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%p = phi i1 [ false, %Top ], [ %c, %NextCond ]
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call void @nonconvergent_callee(ptr %a_elt, i1 %p)
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br label %End
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End:
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ret void
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}
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; CHECK-LABEL: define void @nonconvergent_callee(
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; CHECK: call void @nonconvergent_external(
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; CHECK-NOT: call void @nonconvergent_external(
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define void @nonconvergent_callee(ptr %a_elt, i1 %c) #1 {
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entry:
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%tobool = icmp ne ptr %a_elt, null
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br i1 %tobool, label %then, label %endif
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then:
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br label %endif
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endif:
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call void @nonconvergent_external(ptr %a_elt)
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ret void
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}
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declare void @convergent_external(ptr) #0
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declare void @nonconvergent_external(ptr) #1
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attributes #0 = { convergent nounwind }
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attributes #1 = { nounwind }
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