Certain multi-platform languages, such as OpenCL, have the concept of

address spaces which is both (1) a "semantic" concept and
(2) possibly a hardware level restriction. It is desirable to
be able to discard/merge the LLVM-level address spaces on arguments for which
there is no difference to the current backend while keeping
track of the semantic address spaces in a funciton prototype. To do this
enable addition of the address space into the name-mangling process. Add
some tests to document this behaviour against inadvertent changes.

Patch by Michele Scandale!

llvm-svn: 190684

2 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 3feaf9e572c..e993055cc88 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -88,6 +88,7 @@ TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
 
   // Default to an empty address space map.
   AddrSpaceMap = &DefaultAddrSpaceMap;
+  UseAddrSpaceMapMangling = false;
 
   // Default to an unknown platform name.
   PlatformName = "unknown";
diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index 00431c2a0d6..b1cbc23f814 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -1266,6 +1266,7 @@ namespace {
       TLSSupported = false;
       LongWidth = LongAlign = 64;
       AddrSpaceMap = &NVPTXAddrSpaceMap;
+      UseAddrSpaceMapMangling = true;
       // Define available target features
       // These must be defined in sorted order!
       NoAsmVariants = true;
@@ -1424,6 +1425,7 @@ public:
       : TargetInfo(Triple), GPU(GK_R600) {
     DescriptionString = DescriptionStringR600;
     AddrSpaceMap = &R600AddrSpaceMap;
+    UseAddrSpaceMapMangling = true;
   }
 
   virtual const char * getClobbers() const {
@@ -4577,6 +4579,7 @@ namespace {
                           "f32:32:32-f64:32:32-v64:32:32-"
                           "v128:32:32-a0:0:32-n32";
       AddrSpaceMap = &TCEOpenCLAddrSpaceMap;
+      UseAddrSpaceMapMangling = true;
     }
 
     virtual void getTargetDefines(const LangOptions &Opts,
@@ -5139,6 +5142,7 @@ namespace {
       TLSSupported = false;
       LongWidth = LongAlign = 64;
       AddrSpaceMap = &SPIRAddrSpaceMap;
+      UseAddrSpaceMapMangling = true;
       // Define available target features
       // These must be defined in sorted order!
       NoAsmVariants = true;