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https://github.com/RPCS3/llvm.git
synced 2026-07-19 23:23:38 -04:00
Teresa Johnson
5758e8da00
Summary: Check if the first eligible callee is under the instruction threshold. Checking this on the first eligible callee ensures that we don't end up selecting different callees to import when we invoke this routine with different thresholds due to reaching the callee via paths that are shallower or hotter (when there are multiple copies, i.e. with weak or linkonce linkage). We don't want to leave the decision of which copy to import up to the backend. Reviewers: mehdi_amini Subscribers: inglorion, fhahn, llvm-commits Differential Revision: https://reviews.llvm.org/D35436 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@308078 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
2.7 KiB
LLVM
44 lines
2.7 KiB
LLVM
; Test to ensure that we always select the same copy of a linkonce function
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; when it is encountered with different thresholds. Initially, we will encounter
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; the copy in funcimport_resolved1.ll with a lower threshold by reaching it
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; from the deeper call chain via foo(), and it won't be selected for importing.
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; Later we encounter it with a higher threshold via the direct call from main()
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; and it will be selected. We don't want to select both the copy from
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; funcimport_resolved1.ll and the smaller one from funcimport_resolved2.ll,
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; leaving it up to the backend to figure out which one to actually import.
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; The linkonce_odr may have different instruction counts in practice due to
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; different inlines in the compile step.
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; RUN: opt -module-summary %s -o %t.bc
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; RUN: opt -module-summary %p/Inputs/funcimport_resolved1.ll -o %t2.bc
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; RUN: opt -module-summary %p/Inputs/funcimport_resolved2.ll -o %t3.bc
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; First do a sanity check that all callees are imported with the default
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; instruction limit
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; RUN: llvm-lto2 run %t.bc %t2.bc %t3.bc -o %t4 -r=%t.bc,_main,pl -r=%t.bc,_linkonceodrfunc,l -r=%t.bc,_foo,l -r=%t2.bc,_foo,pl -r=%t2.bc,_linkonceodrfunc,pl -r=%t2.bc,_linkonceodrfunc2,pl -r=%t3.bc,_linkonceodrfunc,l -debug-only=function-import 2>&1 | FileCheck %s --check-prefix=INSTLIMDEFAULT
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; INSTLIMDEFAULT-DAG: Is importing function {{.*}} foo from {{.*}}funcimport_resolved1.ll
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; INSTLIMDEFAULT-DAG: Is importing function {{.*}} linkonceodrfunc from {{.*}}funcimport_resolved1.ll
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; INSTLIMDEFAULT-DAG: Is importing function {{.*}} linkonceodrfunc2 from {{.*}}funcimport_resolved1.ll
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; INSTLIMDEFAULT-DAG: Is importing function {{.*}} f from {{.*}}funcimport_resolved1.ll
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; Now run with the lower threshold that will only allow linkonceodrfunc to be
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; imported from funcimport_resolved1.ll the second time it is encountered.
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; RUN: llvm-lto2 run %t.bc %t2.bc %t3.bc -o %t4 -r=%t.bc,_main,pl -r=%t.bc,_linkonceodrfunc,l -r=%t.bc,_foo,l -r=%t2.bc,_foo,pl -r=%t2.bc,_linkonceodrfunc,pl -r=%t2.bc,_linkonceodrfunc2,pl -r=%t3.bc,_linkonceodrfunc,l -debug-only=function-import -import-instr-limit=8 2>&1 | FileCheck %s --check-prefix=INSTLIM8
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; INSTLIM8-DAG: Is importing function {{.*}} foo from {{.*}}funcimport_resolved1.ll
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; INSTLIM8-DAG: Is importing function {{.*}} linkonceodrfunc from {{.*}}funcimport_resolved1.ll
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; INSTLIM8-DAG: Not importing function {{.*}} linkonceodrfunc2 from {{.*}}funcimport_resolved1.ll
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; INSTLIM8-DAG: Is importing function {{.*}} f from {{.*}}funcimport_resolved1.ll
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.11.0"
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define i32 @main() #0 {
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entry:
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call void (...) @foo()
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call void (...) @linkonceodrfunc()
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ret i32 0
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}
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declare void @foo(...) #1
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declare void @linkonceodrfunc(...) #1
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