R600/SI: Store constant initializer data in constant memory

This implements a solution for constant initializers suggested
by Vadim Girlin, where we store the data after the shader code
and then use the S_GETPC instruction to compute its address.

This saves use the trouble of creating a new buffer for constant data
and then having to pass the pointer to the kernel via user SGPRs or the
input buffer.

llvm-svn: 213530

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/Target/R600/MCTargetDesc/AMDGPUELFObjectWriter.cpp b/llvm/lib/Target/R600/MCTargetDesc/AMDGPUELFObjectWriter.cpp
index 53b0e85751d..5fb94d5914d 100644
--- a/llvm/lib/Target/R600/MCTargetDesc/AMDGPUELFObjectWriter.cpp
+++ b/llvm/lib/Target/R600/MCTargetDesc/AMDGPUELFObjectWriter.cpp
@@ -10,6 +10,7 @@
 
 #include "AMDGPUMCTargetDesc.h"
 #include "llvm/MC/MCELFObjectWriter.h"
+#include "llvm/MC/MCFixup.h"
 
 using namespace llvm;
 
@@ -21,7 +22,7 @@ public:
 protected:
   unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
                         bool IsPCRel) const override {
-    llvm_unreachable("Not implemented");
+    return Fixup.getKind();
   }
 
 };