Stubs out TLOF for AIX and add support for common vars in assembly output.

Stubs out a TargetLoweringObjectFileXCOFF class, implementing only
SelectSectionForGlobal for common symbols. Also adds an override of
EmitGlobalVariable in PPCAIXAsmPrinter which adds a number of defensive errors
and adds support for emitting common globals.

llvm-svn: 366727

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/aix-xcoff-common.ll b/llvm/test/CodeGen/PowerPC/aix-xcoff-common.ll
new file mode 100644
index 00000000000..0774e9f8eaf
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/aix-xcoff-common.ll
@@ -0,0 +1,24 @@
+; RUN: llc -mtriple powerpc-ibm-aix-xcoff < %s | FileCheck %s
+
+@a = common global i32 0, align 4
+@b = common global i64 0, align 8
+@c = common global i16 0, align 2
+
+@d = common local_unnamed_addr global double 0.000000e+00, align 8
+@f = common local_unnamed_addr global float 0.000000e+00, align 4
+@comm = common local_unnamed_addr global double 0.000000e+00, align 8
+
+@over_aligned = common local_unnamed_addr global double 0.000000e+00, align 32
+
+@array = common local_unnamed_addr global [32 x i8] zeroinitializer, align 1
+
+; CHECK:      .csect .text[PR]
+; CHECK-NEXT:  .file
+; CHECK-NEXT: .comm   a,4,2
+; CHECK-NEXT: .comm   b,8,3
+; CHECK-NEXT: .comm   c,2,1
+; CHECK-NEXT: .comm   d,8,3
+; CHECK-NEXT: .comm   f,4,2
+; CHECK-NEXT: .comm   comm,8,3
+; CHECK-NEXT: .comm   over_aligned,8,5
+; CHECK-NEXT: .comm   array,32,0