[OpenCL][AMDGPU] Add support for -cl-denorms-are-zero
Adjust target features for amdgcn target when -cl-denorms-are-zero is set.
Denormal support is controlled by feature strings fp32-denormals fp64-denormals in amdgcn target. If -cl-denorms-are-zero is not set and the command line does not set fp32/64-denormals feature string, +fp32-denormals +fp64-denormals will be on for GPU's supporting them.
A new virtual function virtual void TargetInfo::adjustTargetOptions(const CodeGenOptions &CGOpts, TargetOptions &TargetOpts) const is introduced to allow adjusting target option by codegen option.
Differential Revision: https://reviews.llvm.org/D22815
llvm-svn: 278151
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index d440624c..3d37a82 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -842,6 +842,9 @@
// created. This complexity should be lifted elsewhere.
getTarget().adjust(getLangOpts());
+ // Adjust target options based on codegen options.
+ getTarget().adjustTargetOptions(getCodeGenOpts(), getTargetOpts());
+
// rewriter project will change target built-in bool type from its default.
if (getFrontendOpts().ProgramAction == frontend::RewriteObjC)
getTarget().noSignedCharForObjCBool();