[PowerPC][AIX] Create multiple constant sections.

Fixes issue where late materialized constants can be more strictly
aligned then their containing csect.

Differential Revision: https://reviews.llvm.org/D103103

1 files changed, 14 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index add34ec..3383f5a 100644
--- a/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -2414,7 +2414,20 @@ bool TargetLoweringObjectFileXCOFF::shouldPutJumpTableInFunctionSection(
 MCSection *TargetLoweringObjectFileXCOFF::getSectionForConstant(
     const DataLayout &DL, SectionKind Kind, const Constant *C,
     Align &Alignment) const {
-  //TODO: Enable emiting constant pool to unique sections when we support it.
+  // TODO: Enable emiting constant pool to unique sections when we support it.
+  if (Alignment > Align(16))
+    report_fatal_error("Alignments greater than 16 not yet supported.");
+
+  if (Alignment == Align(8)) {
+    assert(ReadOnly8Section && "Section should always be initialized.");
+    return ReadOnly8Section;
+  }
+
+  if (Alignment == Align(16)) {
+    assert(ReadOnly16Section && "Section should always be initialized.");
+    return ReadOnly16Section;
+  }
+
   return ReadOnlySection;
 }