@a = common global i8 0, align 8
+; Shared library case, we merge @a as common and keep it for the symbol table.
; CHECK: @a = common global i16 0, align 8
+
+; RUN: ld -plugin %llvmshlibdir/LLVMgold.so \
+; RUN: --plugin-opt=emit-llvm \
+; RUN: %t1.o %t2.o -o %t3.o
+; 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
+
+; RUN: llc %p/Inputs/common.ll -o %t2.o -filetype=obj
+; RUN: ld -plugin %llvmshlibdir/LLVMgold.so \
+; RUN: --plugin-opt=emit-llvm \
+; RUN: %t1.o %t2.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
if (!GV)
continue; // Asm symbol.
- if (GV->hasCommonLinkage()) {
+ if (Resolution != LDPR_PREVAILING_DEF_IRONLY && GV->hasCommonLinkage()) {
// Common linkage is special. There is no single symbol that wins the
// resolution. Instead we have to collect the maximum alignment and size.
// The IR linker does that for us if we just pass it every common GV.
+ // We still have to keep track of LDPR_PREVAILING_DEF_IRONLY so we
+ // internalize once the IR linker has done its job.
continue;
}