8d05185a26
Summary: ThinLTO is relying on linkInModule to import selected function. However a lot of "magic" was hidden in linkInModule and the IRMover, who would rename and promote global variables on the fly. This is moving to an approach where the steps are decoupled and the client is reponsible to specify the list of globals to import. As a consequence some test are changed because they were relying on the previous behavior which was importing the definition of *every* single global without control on the client side. Now the burden is on the client to decide if a global has to be imported or not. Reviewers: tejohnson Subscribers: joker.eph, llvm-commits Differential Revision: http://reviews.llvm.org/D18122 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 263863
78 lines
3.0 KiB
LLVM
78 lines
3.0 KiB
LLVM
; Do setup work for all below tests: generate bitcode and combined index
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; RUN: llvm-as -module-summary %s -o %t.bc
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; RUN: llvm-as -module-summary %p/Inputs/funcimport.ll -o %t2.bc
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; RUN: llvm-lto -thinlto -o %t3 %t.bc %t2.bc
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; Do the import now
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %s -S | FileCheck %s --check-prefix=CHECK --check-prefix=INSTLIMDEF
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; Test import with smaller instruction limit
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; RUN: opt -function-import -summary-file %t3.thinlto.bc %s -import-instr-limit=5 -S | FileCheck %s --check-prefix=CHECK --check-prefix=INSTLIM5
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; INSTLIM5-NOT: @staticfunc.llvm.2
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define i32 @main() #0 {
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entry:
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call void (...) @weakalias()
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call void (...) @analias()
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call void (...) @linkoncealias()
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%call = call i32 (...) @referencestatics()
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%call1 = call i32 (...) @referenceglobals()
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%call2 = call i32 (...) @referencecommon()
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call void (...) @setfuncptr()
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call void (...) @callfuncptr()
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call void (...) @weakfunc()
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ret i32 0
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}
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; Won't import weak alias
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; CHECK-DAG: declare void @weakalias
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declare void @weakalias(...) #1
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; Cannot create an alias to available_externally
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; CHECK-DAG: declare void @analias
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declare void @analias(...) #1
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; Aliases import the aliasee function
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declare void @linkoncealias(...) #1
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; CHECK-DAG: define linkonce_odr void @linkoncefunc()
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; CHECK-DAG: @linkoncealias = alias void (...), bitcast (void ()* @linkoncefunc to void (...)*
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; INSTLIMDEF-DAG: define available_externally i32 @referencestatics(i32 %i)
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; INSTLIM5-DAG: declare i32 @referencestatics(...)
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declare i32 @referencestatics(...) #1
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; The import of referencestatics will expose call to staticfunc that
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; should in turn be imported as a promoted/renamed and hidden function.
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; Ensure that the call is to the properly-renamed function.
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; INSTLIMDEF-DAG: %call = call i32 @staticfunc.llvm.2()
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; INSTLIMDEF-DAG: define available_externally hidden i32 @staticfunc.llvm.2()
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; CHECK-DAG: define available_externally i32 @referenceglobals(i32 %i)
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declare i32 @referenceglobals(...) #1
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; The import of referenceglobals will expose call to globalfunc1 that
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; should in turn be imported.
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; CHECK-DAG: define available_externally void @globalfunc1()
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; CHECK-DAG: define available_externally i32 @referencecommon(i32 %i)
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declare i32 @referencecommon(...) #1
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; CHECK-DAG: define available_externally void @setfuncptr()
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declare void @setfuncptr(...) #1
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; CHECK-DAG: define available_externally void @callfuncptr()
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declare void @callfuncptr(...) #1
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; Ensure that all uses of local variable @P which has used in setfuncptr
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; and callfuncptr are to the same promoted/renamed global.
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; CHECK-DAG: @P.llvm.2 = external hidden global void ()*
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; CHECK-DAG: %0 = load void ()*, void ()** @P.llvm.2,
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; CHECK-DAG: store void ()* @staticfunc2.llvm.2, void ()** @P.llvm.2,
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; Won't import weak func
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; CHECK-DAG: declare void @weakfunc(...)
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declare void @weakfunc(...) #1
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; INSTLIMDEF-DAG: define available_externally hidden void @funcwithpersonality.llvm.2() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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; INSTLIM5-DAG: declare hidden void @funcwithpersonality.llvm.2()
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