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TheRock/compiler/amd-llvm/llvm/test/Other/cgscc-refscc-mutation-order.ll
derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

45 lines
1.2 KiB
LLVM

; RUN: opt -passes='cgscc(function(instcombine))' -debug-pass-manager -disable-output < %s 2>&1 | FileCheck %s
; We want to run passes on every SCC in a RefSCC without bailing even if one of the SCCs becomes a child SCC.
; This prevents explosive behavior on huge RefSCCs where a non-trivial amount of
; SCCs in the RefSCC become their own RefSCC as passes run on them. Otherwise we
; end up visiting the huge RefSCC the number of times that an SCC is split out
; rather than just twice.
; CHECK: Running pass: InstCombinePass on f1
; CHECK-NOT: InstCombinePass
; CHECK: Running pass: InstCombinePass on f2
; CHECK-NOT: InstCombinePass
; CHECK: Running pass: InstCombinePass on f3
; CHECK-NOT: InstCombinePass
; CHECK: Running pass: InstCombinePass on f4
; CHECK-NOT: InstCombinePass
@a1 = alias void (), ptr @f1
@a2 = alias void (), ptr @f2
@a3 = alias void (), ptr @f3
@a4 = alias void (), ptr @f4
define void @f1() {
call void @a2()
call void @a3()
call void @a4()
ret void
}
define void @f2() {
call void @a1() readnone nounwind willreturn
ret void
}
define void @f3() {
call void @a1() readnone nounwind willreturn
ret void
}
define void @f4() {
call void @a1() readnone nounwind willreturn
ret void
}