491dd2711f
``` // The legacy PM CGPassManager discovers SCCs this way: for function in the source order tarjanSCC(function) // While the new PM CGSCCPassManager does: for function in the reversed source order [1] discover a reference graph SCC build call graph SCCs inside the reference graph SCC ``` In the common cases, reference graph ~= call graph, the new PM order is undesired because for `a | b | c` (3 independent functions), the new PM will process them in the reversed order: c, b, a. If `a <-> b <-> c`, we can see that `-print-after-all` will report the sole SCC as `scc: (c, b, a)`. This patch corrects the iteration order. The discovered SCC order will match the legacy PM in the common cases. For some tests (`Transforms/Inline/cgscc-*.ll` and `unittests/Analysis/CGSCCPassManagerTest.cpp`), the behaviors are dependent on the SCC discovery order and there are too many check lines for the particular order. This patch simply reverses the function order to avoid changing too many check lines. Differential Revision: https://reviews.llvm.org/D90566
344 lines
7.3 KiB
LLVM
344 lines
7.3 KiB
LLVM
; RUN: opt -disable-output -passes=print-lcg %s 2>&1 | FileCheck %s
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;
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; Basic validation of the call graph analysis used in the new pass manager.
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define void @f() {
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; CHECK-LABEL: Edges in function: f
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; CHECK-NOT: ->
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entry:
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ret void
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}
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; A bunch more functions just to make it easier to test several call edges at once.
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define void @f1() {
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ret void
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}
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define void @f2() {
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ret void
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}
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define void @f3() {
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ret void
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}
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define void @f4() {
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ret void
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}
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define void @f5() {
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ret void
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}
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define void @f6() {
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ret void
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}
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define void @f7() {
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ret void
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}
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define void @f8() {
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ret void
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}
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define void @f9() {
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ret void
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}
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define void @f10() {
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ret void
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}
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define void @f11() {
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ret void
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}
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define void @f12() {
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ret void
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}
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declare i32 @__gxx_personality_v0(...)
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define void @test0() {
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; CHECK-LABEL: Edges in function: test0
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; CHECK-NEXT: call -> f
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; CHECK-NOT: ->
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entry:
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call void @f()
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call void @f()
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call void @f()
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call void @f()
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ret void
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}
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define void ()* @test1(void ()** %x) personality i32 (...)* @__gxx_personality_v0 {
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; CHECK-LABEL: Edges in function: test1
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; CHECK-NEXT: call -> f6
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; CHECK-NEXT: call -> f10
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; CHECK-NEXT: ref -> f12
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; CHECK-NEXT: ref -> f11
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; CHECK-NEXT: ref -> f7
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; CHECK-NEXT: ref -> f9
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; CHECK-NEXT: ref -> f8
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; CHECK-NEXT: ref -> f5
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; CHECK-NEXT: ref -> f4
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; CHECK-NEXT: ref -> f3
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; CHECK-NEXT: ref -> f2
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; CHECK-NEXT: ref -> f1
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; CHECK-NOT: ->
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entry:
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br label %next
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dead:
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br label %next
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next:
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phi void ()* [ @f1, %entry ], [ @f2, %dead ]
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select i1 true, void ()* @f3, void ()* @f4
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store void ()* @f5, void ()** %x
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call void @f6()
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call void (void ()*, void ()*) bitcast (void ()* @f7 to void (void ()*, void ()*)*)(void ()* @f8, void ()* @f9)
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invoke void @f10() to label %exit unwind label %unwind
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exit:
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ret void ()* @f11
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unwind:
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%res = landingpad { i8*, i32 }
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cleanup
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resume { i8*, i32 } { i8* bitcast (void ()* @f12 to i8*), i32 42 }
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}
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@g = global void ()* @f1
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@g1 = global [4 x void ()*] [void ()* @f2, void ()* @f3, void ()* @f4, void ()* @f5]
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@g2 = global {i8, void ()*, i8} {i8 1, void ()* @f6, i8 2}
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@h = constant void ()* @f7
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define void @test2() {
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; CHECK-LABEL: Edges in function: test2
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; CHECK-NEXT: ref -> f7
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; CHECK-NEXT: ref -> f6
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; CHECK-NEXT: ref -> f5
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; CHECK-NEXT: ref -> f4
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; CHECK-NEXT: ref -> f3
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; CHECK-NEXT: ref -> f2
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; CHECK-NEXT: ref -> f1
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; CHECK-NOT: ->
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load i8*, i8** bitcast (void ()** @g to i8**)
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load i8*, i8** bitcast (void ()** getelementptr ([4 x void ()*], [4 x void ()*]* @g1, i32 0, i32 2) to i8**)
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load i8*, i8** bitcast (void ()** getelementptr ({i8, void ()*, i8}, {i8, void ()*, i8}* @g2, i32 0, i32 1) to i8**)
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load i8*, i8** bitcast (void ()** @h to i8**)
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ret void
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}
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@test3_ptr = external global void ()*
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define void @test3_aa1() {
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; CHECK-LABEL: Edges in function: test3_aa1
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; CHECK-NEXT: call -> test3_aa2
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; CHECK-NEXT: ref -> test3_ab1
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; CHECK-NOT: ->
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entry:
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call void @test3_aa2()
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store void ()* @test3_ab1, void ()** @test3_ptr
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ret void
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}
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define void @test3_aa2() {
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; CHECK-LABEL: Edges in function: test3_aa2
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; CHECK-NEXT: call -> test3_aa1
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; CHECK-NEXT: call -> test3_ab2
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; CHECK-NOT: ->
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entry:
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call void @test3_aa1()
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call void @test3_ab2()
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ret void
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}
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define void @test3_ab1() {
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; CHECK-LABEL: Edges in function: test3_ab1
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; CHECK-NEXT: call -> test3_ab2
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; CHECK-NEXT: call -> test3_ac1
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; CHECK-NOT: ->
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entry:
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call void @test3_ab2()
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call void @test3_ac1()
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ret void
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}
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define void @test3_ab2() {
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; CHECK-LABEL: Edges in function: test3_ab2
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; CHECK-NEXT: call -> test3_ab1
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; CHECK-NEXT: call -> test3_ba1
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; CHECK-NOT: ->
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entry:
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call void @test3_ab1()
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call void @test3_ba1()
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ret void
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}
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define void @test3_ac1() {
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; CHECK-LABEL: Edges in function: test3_ac1
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; CHECK-NEXT: call -> test3_ac2
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; CHECK-NEXT: ref -> test3_aa2
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; CHECK-NOT: ->
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entry:
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call void @test3_ac2()
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store void ()* @test3_aa2, void ()** @test3_ptr
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ret void
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}
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define void @test3_ac2() {
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; CHECK-LABEL: Edges in function: test3_ac2
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; CHECK-NEXT: call -> test3_ac1
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; CHECK-NEXT: ref -> test3_ba1
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; CHECK-NOT: ->
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entry:
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call void @test3_ac1()
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store void ()* @test3_ba1, void ()** @test3_ptr
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ret void
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}
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define void @test3_ba1() {
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; CHECK-LABEL: Edges in function: test3_ba1
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; CHECK-NEXT: call -> test3_bb1
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; CHECK-NEXT: ref -> test3_ca1
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; CHECK-NOT: ->
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entry:
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call void @test3_bb1()
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store void ()* @test3_ca1, void ()** @test3_ptr
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ret void
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}
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define void @test3_bb1() {
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; CHECK-LABEL: Edges in function: test3_bb1
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; CHECK-NEXT: call -> test3_ca2
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; CHECK-NEXT: ref -> test3_ba1
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; CHECK-NOT: ->
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entry:
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call void @test3_ca2()
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store void ()* @test3_ba1, void ()** @test3_ptr
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ret void
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}
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define void @test3_ca1() {
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; CHECK-LABEL: Edges in function: test3_ca1
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; CHECK-NEXT: call -> test3_ca2
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; CHECK-NOT: ->
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entry:
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call void @test3_ca2()
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ret void
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}
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define void @test3_ca2() {
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; CHECK-LABEL: Edges in function: test3_ca2
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; CHECK-NEXT: call -> test3_ca3
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; CHECK-NOT: ->
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entry:
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call void @test3_ca3()
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ret void
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}
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define void @test3_ca3() {
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; CHECK-LABEL: Edges in function: test3_ca3
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; CHECK-NEXT: call -> test3_ca1
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; CHECK-NOT: ->
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entry:
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call void @test3_ca1()
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ret void
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}
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; Verify the SCCs formed.
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f1
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f2
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f3
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f4
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f5
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f6
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f7
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f8
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f9
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f10
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f11
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: f12
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: test0
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: test1
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: test2
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;
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; CHECK-LABEL: RefSCC with 1 call SCCs:
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; CHECK-NEXT: SCC with 3 functions:
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; CHECK-NEXT: test3_ca2
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; CHECK-NEXT: test3_ca3
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; CHECK-NEXT: test3_ca1
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;
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; CHECK-LABEL: RefSCC with 2 call SCCs:
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: test3_bb1
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; CHECK-NEXT: SCC with 1 functions:
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; CHECK-NEXT: test3_ba1
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;
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; CHECK-LABEL: RefSCC with 3 call SCCs:
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; CHECK-NEXT: SCC with 2 functions:
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; CHECK-NEXT: test3_ac1
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; CHECK-NEXT: test3_ac2
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; CHECK-NEXT: SCC with 2 functions:
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; CHECK-NEXT: test3_ab2
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; CHECK-NEXT: test3_ab1
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; CHECK-NEXT: SCC with 2 functions:
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; CHECK-NEXT: test3_aa1
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; CHECK-NEXT: test3_aa2
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