derek.holloway
7502bf64a4
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50 lines
1.1 KiB
LLVM
50 lines
1.1 KiB
LLVM
; RUN: opt -S -passes=adce < %s | FileCheck %s
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; While it is normally okay to DCE out calls to @readonly_function and
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; @readnone_function, we cannot do that if they're carrying operand
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; bundles since the presence of unknown operand bundles implies
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; arbitrary memory effects.
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declare void @readonly_function() readonly nounwind willreturn
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declare void @readnone_function() readnone nounwind willreturn
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define void @test0() {
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; CHECK-LABEL: @test0(
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entry:
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call void @readonly_function() [ "tag"() ]
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; CHECK: call void @readonly_function
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ret void
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}
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define void @test1() {
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; CHECK-LABEL: @test1(
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entry:
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call void @readnone_function() [ "tag"() ]
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; CHECK: call void @readnone_function
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ret void
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}
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define void @test2() {
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; CHECK-LABEL: @test2(
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entry:
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; CHECK-NOT: @readonly_function(
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call void @readonly_function() readonly [ "tag"() ]
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ret void
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}
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define void @test3() {
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; CHECK-LABEL: @test3(
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entry:
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; CHECK-NOT: @readnone_function(
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call void @readnone_function() readnone [ "tag"() ]
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ret void
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}
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define void @test4() {
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; CHECK-LABEL: @test4(
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entry:
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; CHECK-NOT: @readonly_function()
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call void @readonly_function() [ "deopt"() ]
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ret void
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}
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