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a2f6e4d840
Summary: 1. Use stream 0 only for combined module. Previously if combined module was not processes ThinLTO used the stream for own output. However small changes in input, could trigger combined module and shuffle outputs making life of llvm::LTO harder. 2. Always process combined module and write output to stream 0. Processing empty combined module is cheap and allows llvm::LTO users to avoid implementing processing which is already done in llvm::LTO. Subscribers: mehdi_amini, inglorion, eraman, hiraditya Differential Revision: https://reviews.llvm.org/D41267 llvm-svn: 320905
129 lines
3.9 KiB
LLVM
129 lines
3.9 KiB
LLVM
; Test to ensure that uses and defs in module level asm are handled
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; appropriately. Specifically, we should conservatively block importing
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; of any references to these values, as they can't be renamed.
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; RUN: opt -module-summary %s -o %t1.bc
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; RUN: opt -module-summary %p/Inputs/module_asm2.ll -o %t2.bc
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; RUN: llvm-lto -thinlto-action=run -exported-symbol=main -exported-symbol=func1 -exported-symbol=func2 -exported-symbol=func3 -exported-symbol=callglobalfunc -exported-symbol=callweakfunc %t1.bc %t2.bc
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; RUN: llvm-nm %t1.bc.thinlto.o | FileCheck %s --check-prefix=NM0
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; RUN: llvm-nm %t2.bc.thinlto.o | FileCheck %s --check-prefix=NM1
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; RUN: llvm-lto2 run %t1.bc %t2.bc -o %t.o -save-temps \
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; RUN: -r=%t1.bc,foo,plx \
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; RUN: -r=%t1.bc,globalfunc,plx \
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; RUN: -r=%t1.bc,globalfunc,lx \
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; RUN: -r=%t1.bc,weakfunc,plx \
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; RUN: -r=%t1.bc,weakfunc,lx \
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; RUN: -r=%t1.bc,b,pl \
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; RUN: -r=%t1.bc,x,pl \
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; RUN: -r=%t1.bc,func1,pl \
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; RUN: -r=%t1.bc,func2,pl \
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; RUN: -r=%t1.bc,func3,pl \
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; RUN: -r=%t1.bc,callglobalfunc,plx \
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; RUN: -r=%t1.bc,callweakfunc,plx \
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; RUN: -r=%t2.bc,main,plx \
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; RUN: -r=%t2.bc,func1,l \
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; RUN: -r=%t2.bc,func2,l \
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; RUN: -r=%t2.bc,func3,l \
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; RUN: -r=%t2.bc,callglobalfunc,l \
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; RUN: -r=%t2.bc,callweakfunc,l
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; RUN: llvm-nm %t.o.1 | FileCheck %s --check-prefix=NM0
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; RUN: llvm-nm %t.o.2 | FileCheck %s --check-prefix=NM1
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; Check that local values b and x, which are referenced on
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; llvm.used and llvm.compiler.used, respectively, are not promoted.
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; Similarly, foo which is defined in module level asm should not be
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; promoted.
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; NM0-DAG: d b
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; NM0-DAG: d x
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; NM0-DAG: t foo
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; NM0-DAG: T func1
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; NM0-DAG: T func2
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; NM0-DAG: T func3
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; NM0-DAG: T callglobalfunc
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; NM0-DAG: T callweakfunc
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; NM0-DAG: T globalfunc
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; NM0-DAG: W weakfunc
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; Ensure that foo, b and x are likewise not exported (imported as refs
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; into the other module), since they can't be promoted. Additionally,
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; referencing functions func2 and func3 should not have been
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; imported. However, we should have been able to import callglobalfunc
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; and callweakfunc (leaving undefined symbols globalfunc and weakfunc)
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; since globalfunc and weakfunc were defined but not local in module asm.
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; NM1-NOT: foo
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; NM1-NOT: b
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; NM1-NOT: x
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; NM1-DAG: U func1
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; NM1-DAG: U func2
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; NM1-DAG: U func3
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; NM1-DAG: U globalfunc
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; NM1-DAG: U weakfunc
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; NM1-DAG: T main
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; NM1-NOT: foo
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; NM1-NOT: b
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; NM1-NOT: x
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@b = internal global i32 1, align 4
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@x = internal global i32 1, align 4
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@llvm.compiler.used = appending global [1 x i8*] [i8* bitcast (i32* @b to i8*)], section "llvm.metadata"
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@llvm.used = appending global [1 x i8*] [i8* bitcast (i32* @x to i8*)], section "llvm.metadata"
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module asm "\09.text"
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module asm "\09.type\09foo,@function"
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module asm "foo:"
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module asm "\09movl b, %eax"
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module asm "\09movl x, %edx"
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module asm "\09ret "
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module asm "\09.size\09foo, .-foo"
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module asm ""
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module asm "\09.globl\09globalfunc"
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module asm "\09.type\09globalfunc,@function"
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module asm "globalfunc:"
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module asm "\09movl b, %eax"
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module asm "\09movl x, %edx"
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module asm "\09ret "
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module asm "\09.size\09globalfunc, .-globalfunc"
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module asm ""
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module asm "\09.weak\09weakfunc"
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module asm "\09.type\09weakfunc,@function"
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module asm "weakfunc:"
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module asm "\09movl b, %eax"
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module asm "\09movl x, %edx"
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module asm "\09ret "
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module asm "\09.size\09weakfunc, .-weakfunc"
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module asm ""
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declare i16 @foo() #0
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declare i16 @globalfunc() #0
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declare i16 @weakfunc() #0
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define i32 @func1() #1 {
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call i16 @foo()
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ret i32 1
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}
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define i32 @func2() #1 {
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%1 = load i32, i32* @b, align 4
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ret i32 %1
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}
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define i32 @func3() #1 {
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%1 = load i32, i32* @x, align 4
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ret i32 %1
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}
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define i32 @callglobalfunc() #1 {
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call i16 @globalfunc()
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ret i32 1
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}
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define i32 @callweakfunc() #1 {
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call i16 @weakfunc()
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ret i32 1
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}
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