[AIX] Turn -fdata-sections on by default in Clang

Summary:

This patch does the following:
1. Make InitTargetOptionsFromCodeGenFlags() accepts Triple as a
 parameter, because some options' default value is triple dependant.
2. DataSections is turned on by default on AIX for llc.
3. Test cases change accordingly because of the default behaviour change.
4. Clang Driver passes in -fdata-sections by default on AIX.

Reviewed By: MaskRay, DiggerLin

Differential Revision: https://reviews.llvm.org/D88737

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/CommandFlags.cpp b/llvm/lib/CodeGen/CommandFlags.cpp
index 078fee6..a909358 100644
--- a/llvm/lib/CodeGen/CommandFlags.cpp
+++ b/llvm/lib/CodeGen/CommandFlags.cpp
@@ -461,7 +461,8 @@ codegen::getBBSectionsMode(llvm::TargetOptions &Options) {
 
 // Common utility function tightly tied to the options listed here. Initializes
 // a TargetOptions object with CodeGen flags and returns it.
-TargetOptions codegen::InitTargetOptionsFromCodeGenFlags() {
+TargetOptions
+codegen::InitTargetOptionsFromCodeGenFlags(const Triple &TheTriple) {
   TargetOptions Options;
   Options.AllowFPOpFusion = getFuseFPOps();
   Options.UnsafeFPMath = getEnableUnsafeFPMath();
@@ -485,7 +486,8 @@ TargetOptions codegen::InitTargetOptionsFromCodeGenFlags() {
   Options.StackSymbolOrdering = getStackSymbolOrdering();
   Options.UseInitArray = !getUseCtors();
   Options.RelaxELFRelocations = getRelaxELFRelocations();
-  Options.DataSections = getDataSections();
+  Options.DataSections =
+      getExplicitDataSections().getValueOr(TheTriple.hasDefaultDataSections());
   Options.FunctionSections = getFunctionSections();
   Options.IgnoreXCOFFVisibility = getIgnoreXCOFFVisibility();
   Options.BBSections = getBBSectionsMode(Options);