Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Other/cgscc-observe-devirt.ll

@@ -1,106 +0,0 @@
-; Make sure that even without some external devirtualization iteration tool,
-; the CGSCC pass manager correctly observes and re-visits SCCs that change
-; structure due to devirtualization. We trigger devirtualization here with GVN
-; which forwards a store through a load and to an indirect call.
-;
-; RUN: opt -aa-pipeline=basic-aa -passes='cgscc(function-attrs)' -S < %s | FileCheck %s --check-prefix=BEFORE
-; RUN: opt -aa-pipeline=basic-aa -passes='cgscc(function-attrs,function(gvn))' -S < %s | FileCheck %s --check-prefix=AFTER
-;
-; Also check that adding an extra CGSCC pass after the function update but
-; without requiring the outer manager to iterate doesn't break any invariant.
-; RUN: opt -aa-pipeline=basic-aa -passes='cgscc(function-attrs,function(gvn),function-attrs)' -S < %s | FileCheck %s --check-prefix=AFTER
-
-declare void @readnone() readnone
-declare void @unknown()
-
-; The @test1_* checks that if we refine an indirect call to a direct call and
-; in the process change the very structure of the call graph we also revisit
-; that component of the graph and do so in an up-to-date fashion.
-
-; BEFORE: define void @test1_a1() {
-; AFTER: define void @test1_a1() {
-define void @test1_a1() {
-  %fptr = alloca void()*
-  store void()* @test1_b2, void()** %fptr
-  store void()* @test1_b1, void()** %fptr
-  %f = load void()*, void()** %fptr
-  call void %f()
-  ret void
-}
-
-; BEFORE: define void @test1_b1() {
-; AFTER: define void @test1_b1() {
-define void @test1_b1() {
-  call void @unknown()
-  call void @test1_a1()
-  ret void
-}
-
-; BEFORE: define void @test1_a2() {
-; AFTER: define void @test1_a2() #0 {
-define void @test1_a2() {
-  %fptr = alloca void()*
-  store void()* @test1_b1, void()** %fptr
-  store void()* @test1_b2, void()** %fptr
-  %f = load void()*, void()** %fptr
-  call void %f()
-  ret void
-}
-
-; BEFORE: define void @test1_b2() {
-; AFTER: define void @test1_b2() #0 {
-define void @test1_b2() {
-  call void @readnone()
-  call void @test1_a2()
-  ret void
-}
-
-
-; The @test2_* set of functions exercise a case where running function passes
-; introduces a new post-order relationship that was not present originally and
-; makes sure we walk across the SCCs in that order.
-
-; CHECK: define void @test2_a() {
-define void @test2_a() {
-  call void @test2_b1()
-  call void @test2_b2()
-  call void @test2_b3()
-  call void @unknown()
-  ret void
-}
-
-; CHECK: define void @test2_b1() #0 {
-define void @test2_b1() {
-  %fptr = alloca void()*
-  store void()* @test2_a, void()** %fptr
-  store void()* @readnone, void()** %fptr
-  %f = load void()*, void()** %fptr
-  call void %f()
-  ret void
-}
-
-; CHECK: define void @test2_b2() #0 {
-define void @test2_b2() {
-  %fptr = alloca void()*
-  store void()* @test2_a, void()** %fptr
-  store void()* @test2_b2, void()** %fptr
-  store void()* @test2_b3, void()** %fptr
-  store void()* @test2_b1, void()** %fptr
-  %f = load void()*, void()** %fptr
-  call void %f()
-  ret void
-}
-
-; CHECK: define void @test2_b3() #0 {
-define void @test2_b3() {
-  %fptr = alloca void()*
-  store void()* @test2_a, void()** %fptr
-  store void()* @test2_b2, void()** %fptr
-  store void()* @test2_b3, void()** %fptr
-  store void()* @test2_b1, void()** %fptr
-  %f = load void()*, void()** %fptr
-  call void %f()
-  ret void
-}
-
-; CHECK: attributes #0 = { readnone }