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[gold] Fix linkInModule and extend common.ll test.

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Fix early exit from linkInModule. IRMover::move returns false on
success and true on error.

Add a few more cases of merged common linkage variables with
different sizes and alignments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267437 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2016-04-25 18:23:29 +00:00
parent 82f582e20e
commit c650ff5ec6
5 changed files with 32 additions and 12 deletions
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2
test/tools/gold/X86/Inputs/common.ll
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@ -1 +1 @@
@a = common global i16 0, align 4
@a = common global i32 0, align 4

1
test/tools/gold/X86/Inputs/common2.ll Normal file
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@ -0,0 +1 @@
@a = common global i8 0, align 16

1
test/tools/gold/X86/Inputs/common3.ll Normal file
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@ -0,0 +1 @@
@a = common global i8 0, align 1

34
test/tools/gold/X86/common.ll
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@ -1,15 +1,33 @@
; RUN: llvm-as %s -o %t1.o
; RUN: llvm-as %p/Inputs/common.ll -o %t2.o
; RUN: llvm-as %p/Inputs/common2.ll -o %t2b.o
; RUN: llvm-as %p/Inputs/common3.ll -o %t2c.o
@a = common global i16 0, align 8
; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN: --plugin-opt=emit-llvm \
; RUN: -shared %t1.o %t2.o -o %t3.o
; RUN: llvm-dis %t3.o -o - | FileCheck %s
@a = common global i8 0, align 8
; RUN: llvm-dis %t3.o -o - | FileCheck %s --check-prefix=A
; Shared library case, we merge @a as common and keep it for the symbol table.
; CHECK: @a = common global i16 0, align 8
; A: @a = common global i32 0, align 8
; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN: --plugin-opt=emit-llvm \
; RUN: -shared %t1.o %t2b.o -o %t3.o
; RUN: llvm-dis %t3.o -o - | FileCheck %s --check-prefix=B
; (i16 align 8) + (i8 align 16) = i16 align 16
; B: @a = common global i16 0, align 16
; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN: --plugin-opt=emit-llvm \
; RUN: -shared %t1.o %t2c.o -o %t3.o
; RUN: llvm-dis %t3.o -o - | FileCheck %s --check-prefix=C
; (i16 align 8) + (i8 align 1) = i16 align 8.
; C: @a = common global i16 0, align 8
; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN: --plugin-opt=emit-llvm \
@ -17,13 +35,13 @@
; RUN: llvm-dis %t3.o -o - | FileCheck --check-prefix=EXEC %s
; All IR case, we internalize a after merging.
; EXEC: @a = internal global i16 0, align 8
; EXEC: @a = internal global i32 0, align 8
; RUN: llc %p/Inputs/common.ll -o %t2.o -filetype=obj
; RUN: llc %p/Inputs/common.ll -o %t2native.o -filetype=obj
; RUN: %gold -plugin %llvmshlibdir/LLVMgold.so \
; RUN: --plugin-opt=emit-llvm \
; RUN: %t1.o %t2.o -o %t3.o
; RUN: %t1.o %t2native.o -o %t3.o
; RUN: llvm-dis %t3.o -o - | FileCheck --check-prefix=MIXED %s
; Mixed ELF and IR. We keep ours as common so the linker will finish the merge.
; MIXED: @a = common global i8 0, align 8
; MIXED: @a = common global i16 0, align 8

6
tools/gold/gold-plugin.cpp
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@ -1090,8 +1090,8 @@ static bool linkInModule(LLVMContext &Context, IRMover &L, claimed_file &F,
M->setTargetTriple(DefaultTriple);
}
if (!L.move(std::move(M), Keep, [](GlobalValue &, IRMover::ValueAdder) {}))
return false;
if (L.move(std::move(M), Keep, [](GlobalValue &, IRMover::ValueAdder) {}))
return true;
for (const auto &I : Realign) {
GlobalValue *Dst = L.getModule().getNamedValue(I.first());
@ -1100,7 +1100,7 @@ static bool linkInModule(LLVMContext &Context, IRMover &L, claimed_file &F,
cast<GlobalVariable>(Dst)->setAlignment(I.second);
}
return true;
return false;
}
/// Perform the ThinLTO backend on a single module, invoking the LTO and codegen