derek.holloway
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61 lines
2.5 KiB
LLVM
61 lines
2.5 KiB
LLVM
; Check that we promote constant object in the source module and import it
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; even when it is referenced in some other GV initializer and/or is used
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; by store instructions.
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; RUN: opt -thinlto-bc %s -o %t1.bc
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; RUN: opt -thinlto-bc %p/Inputs/import-constant.ll -o %t2.bc
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; RUN: llvm-lto2 run -save-temps %t1.bc %t2.bc -o %t-out \
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; RUN: -import-constants-with-refs \
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; RUN: -r=%t1.bc,main,plx \
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; RUN: -r=%t1.bc,_Z6getObjv,l \
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; RUN: -r=%t2.bc,_Z6getObjv,pl \
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; RUN: -r=%t2.bc,val,pl \
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; RUN: -r=%t2.bc,outer,pl
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; RUN: llvm-dis %t-out.2.1.promote.bc -o - | FileCheck %s --check-prefix=PROMOTE
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; RUN: llvm-dis %t-out.1.3.import.bc -o - | FileCheck %s --check-prefix=IMPORT
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; RUN: llvm-dis %t-out.1.4.opt.bc -o - | FileCheck %s --check-prefix=OPT
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; Check when importing references is prohibited
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; RUN: llvm-lto2 run -save-temps %t1.bc %t2.bc -o %t-out-norefs \
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; RUN: -import-constants-with-refs=false \
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; RUN: -r=%t1.bc,main,plx \
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; RUN: -r=%t1.bc,_Z6getObjv,l \
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; RUN: -r=%t2.bc,_Z6getObjv,pl \
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; RUN: -r=%t2.bc,val,pl \
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; RUN: -r=%t2.bc,outer,pl
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; RUN: llvm-dis %t-out-norefs.1.3.import.bc -o - | FileCheck %s --check-prefix=NOREFS
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; Check that variable has been promoted in the source module
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; PROMOTE: @_ZL3Obj.llvm.{{.*}} = hidden constant %struct.S { i32 4, i32 8, ptr @val }
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; @outer is a write-only variable, so it's been converted to zeroinitializer.
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; IMPORT: @val = available_externally global i32 42
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; IMPORT-NEXT: @_ZL3Obj.llvm.{{.*}} = available_externally hidden constant %struct.S { i32 4, i32 8, ptr @val }
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; IMPORT-NEXT: @outer = internal local_unnamed_addr global %struct.Q zeroinitializer
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; @outer is a write-only variable that's stored to once, so the store and the global can be removed.
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; OPT-NOT: @outer
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; OPT: define dso_local noundef i32 @main()
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; OPT-NEXT: entry:
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; OPT-NEXT: ret i32 12
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; NOREFS: @_ZL3Obj.llvm.{{.*}} = external hidden constant %struct.S
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; NOREFS-NEXT: @outer = internal local_unnamed_addr global %struct.Q zeroinitializer
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%struct.S = type { i32, i32, ptr }
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define dso_local i32 @main() local_unnamed_addr {
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entry:
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%call = tail call ptr @_Z6getObjv()
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%0 = load i32, ptr %call, align 8
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%v = getelementptr inbounds %struct.S, ptr %call, i64 0, i32 1
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%1 = load i32, ptr %v, align 4
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%add = add nsw i32 %1, %0
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ret i32 %add
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}
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declare dso_local ptr @_Z6getObjv() local_unnamed_addr
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