R600: Use StructurizeCFGPass for non SI targets

StructurizeCFG pass allows to make complex cfg reducible ; it allows a lot of
shader from shadertoy (which exhibits complex control flow constructs) to works
correctly with respect to CFG handling (and allow us to detect potential bug in
other part of the backend).

We provide a cmd line argument to disable the pass for debug purpose.

Patch by: Vincent Lejeune

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192363 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Target/R600/AMDGPUSubtarget.cpp b/lib/Target/R600/AMDGPUSubtarget.cpp
index 53cfe84..1e21c8e 100644
--- a/lib/Target/R600/AMDGPUSubtarget.cpp
+++ b/lib/Target/R600/AMDGPUSubtarget.cpp
@@ -36,6 +36,7 @@ AMDGPUSubtarget::AMDGPUSubtarget(StringRef TT, StringRef CPU, StringRef FS) :
   Gen = AMDGPUSubtarget::R600;
   FP64 = false;
   CaymanISA = false;
+  EnableIRStructurizer = false;
   ParseSubtargetFeatures(GPU, FS);
   DevName = GPU;
 }
@@ -65,6 +66,10 @@ AMDGPUSubtarget::hasCaymanISA() const {
   return CaymanISA;
 }
 bool
+AMDGPUSubtarget::IsIRStructurizerEnabled() const {
+  return EnableIRStructurizer;
+}
+bool
 AMDGPUSubtarget::isTargetELF() const {
   return false;
 }