342 lines
6.3 KiB
LLVM
342 lines
6.3 KiB
LLVM
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; RUN: opt -aa-pipeline=basic-aa -passes='cgscc(function-attrs,function(simplify-cfg))' -S < %s | FileCheck %s
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declare void @readnone() readnone
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declare void @unknown()
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declare void @reference_function_pointer(void()*) readnone
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; The @test1_* set of functions checks that when we mutate functions with
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; simplify-cfg to delete call edges and this ends up splitting both the SCCs
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; and the RefSCCs that those functions are in, we re-run the CGSCC passes to
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; observe the refined call graph structure.
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; CHECK: define void @test1_a() {
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define void @test1_a() {
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call void @test1_b1()
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call void @test1_b2()
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call void @test1_b3()
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call void @test1_b4()
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ret void
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}
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; CHECK: define void @test1_b1() #0 {
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define void @test1_b1() {
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call void @readnone()
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ret void
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}
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; CHECK: define void @test1_b2() #0 {
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define void @test1_b2() {
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call void @readnone()
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br i1 false, label %dead, label %exit
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dead:
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call void @test1_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test1_b3() {
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define void @test1_b3() {
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call void @unknown()
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br i1 false, label %dead, label %exit
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dead:
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call void @test1_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test1_b4() #0 {
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define void @test1_b4() {
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call void @readnone()
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br i1 false, label %dead, label %exit
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dead:
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call void @test1_a()
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br label %exit
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exit:
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ret void
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}
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; The @test2_* set of functions provide similar checks to @test1_* but only
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; splitting the SCCs while leaving the RefSCC intact. This is accomplished by
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; having dummy ref edges to the root function.
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; CHECK: define void @test2_a() {
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define void @test2_a() {
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call void @test2_b1()
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call void @test2_b2()
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call void @test2_b3()
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call void @test2_b4()
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ret void
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}
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; CHECK: define void @test2_b1() #0 {
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define void @test2_b1() {
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call void @readnone()
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ret void
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}
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; CHECK: define void @test2_b2() #0 {
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define void @test2_b2() {
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call void @reference_function_pointer(void()* @test2_a)
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br i1 false, label %dead, label %exit
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dead:
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call void @test2_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test2_b3() {
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define void @test2_b3() {
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call void @reference_function_pointer(void()* @test2_a)
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call void @unknown()
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br i1 false, label %dead, label %exit
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dead:
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call void @test2_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test2_b4() #0 {
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define void @test2_b4() {
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call void @reference_function_pointer(void()* @test2_a)
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br i1 false, label %dead, label %exit
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dead:
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call void @test2_a()
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br label %exit
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exit:
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ret void
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}
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; The @test3_* set of functions are the same challenge as @test1_* but with
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; multiple layers that have to be traversed in the correct order instead of
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; a single node.
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; CHECK: define void @test3_a() {
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define void @test3_a() {
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call void @test3_b11()
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call void @test3_b21()
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call void @test3_b31()
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call void @test3_b41()
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ret void
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}
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; CHECK: define void @test3_b11() #0 {
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define void @test3_b11() {
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call void @test3_b12()
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ret void
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}
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; CHECK: define void @test3_b12() #0 {
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define void @test3_b12() {
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call void @test3_b13()
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ret void
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}
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; CHECK: define void @test3_b13() #0 {
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define void @test3_b13() {
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call void @readnone()
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ret void
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}
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; CHECK: define void @test3_b21() #0 {
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define void @test3_b21() {
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call void @test3_b22()
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ret void
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}
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; CHECK: define void @test3_b22() #0 {
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define void @test3_b22() {
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call void @test3_b23()
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ret void
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}
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; CHECK: define void @test3_b23() #0 {
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define void @test3_b23() {
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call void @readnone()
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br i1 false, label %dead, label %exit
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dead:
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call void @test3_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test3_b31() {
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define void @test3_b31() {
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call void @test3_b32()
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ret void
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}
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; CHECK: define void @test3_b32() {
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define void @test3_b32() {
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call void @test3_b33()
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ret void
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}
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; CHECK: define void @test3_b33() {
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define void @test3_b33() {
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call void @unknown()
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br i1 false, label %dead, label %exit
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dead:
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call void @test3_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test3_b41() #0 {
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define void @test3_b41() {
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call void @test3_b42()
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ret void
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}
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; CHECK: define void @test3_b42() #0 {
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define void @test3_b42() {
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call void @test3_b43()
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ret void
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}
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; CHECK: define void @test3_b43() #0 {
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define void @test3_b43() {
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call void @readnone()
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br i1 false, label %dead, label %exit
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dead:
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call void @test3_a()
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br label %exit
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exit:
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ret void
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}
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; The @test4_* functions exercise the same core challenge as the @test2_*
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; functions, but again include long chains instead of single nodes and ensure
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; we traverse the chains in the correct order.
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; CHECK: define void @test4_a() {
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define void @test4_a() {
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call void @test4_b11()
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call void @test4_b21()
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call void @test4_b31()
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call void @test4_b41()
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ret void
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}
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; CHECK: define void @test4_b11() #0 {
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define void @test4_b11() {
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call void @test4_b12()
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ret void
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}
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; CHECK: define void @test4_b12() #0 {
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define void @test4_b12() {
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call void @test4_b13()
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ret void
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}
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; CHECK: define void @test4_b13() #0 {
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define void @test4_b13() {
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call void @readnone()
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ret void
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}
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; CHECK: define void @test4_b21() #0 {
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define void @test4_b21() {
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call void @test4_b22()
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ret void
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}
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; CHECK: define void @test4_b22() #0 {
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define void @test4_b22() {
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call void @test4_b23()
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ret void
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}
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; CHECK: define void @test4_b23() #0 {
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define void @test4_b23() {
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call void @reference_function_pointer(void()* @test4_a)
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br i1 false, label %dead, label %exit
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dead:
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call void @test4_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test4_b31() {
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define void @test4_b31() {
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call void @test4_b32()
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ret void
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}
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; CHECK: define void @test4_b32() {
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define void @test4_b32() {
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call void @test4_b33()
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ret void
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}
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; CHECK: define void @test4_b33() {
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define void @test4_b33() {
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call void @reference_function_pointer(void()* @test4_a)
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call void @unknown()
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br i1 false, label %dead, label %exit
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dead:
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call void @test4_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: define void @test4_b41() #0 {
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define void @test4_b41() {
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call void @test4_b42()
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ret void
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}
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; CHECK: define void @test4_b42() #0 {
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define void @test4_b42() {
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call void @test4_b43()
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ret void
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}
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; CHECK: define void @test4_b43() #0 {
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define void @test4_b43() {
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call void @reference_function_pointer(void()* @test4_a)
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br i1 false, label %dead, label %exit
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dead:
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call void @test4_a()
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br label %exit
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exit:
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ret void
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}
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; CHECK: attributes #0 = { readnone }
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