AMDGPU: Create emergency stack slots during frame lowering

[oota-llvm.git] / lib / Target / AMDGPU / AMDGPUSubtarget.cpp

diff --git a/lib/Target/AMDGPU/AMDGPUSubtarget.cpp b/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
index 5f32a65c93382ba18a5a3fdda9f6d0dc10067de5..a50097fa097e74a2bf9a578d690b43ca1fb28512 100644 (file)
--- a/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
+++ b/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
@@ -74,19 +74,29 @@ AMDGPUSubtarget::AMDGPUSubtarget(const Triple &TT, StringRef GPU, StringRef FS,
       EnableVGPRSpilling(false), SGPRInitBug(false), IsGCN(false),
       GCN1Encoding(false), GCN3Encoding(false), CIInsts(false), LDSBankCount(0),
       IsaVersion(ISAVersion0_0_0), EnableHugeScratchBuffer(false),
-      FrameLowering(TargetFrameLowering::StackGrowsUp,
-                    64 * 16, // Maximum stack alignment (long16)
-                    0),
+      FrameLowering(nullptr),
       InstrItins(getInstrItineraryForCPU(GPU)), TargetTriple(TT) {
 
   initializeSubtargetDependencies(TT, GPU, FS);
 
+  const unsigned MaxStackAlign = 64 * 16; // Maximum stack alignment (long16)
+
   if (getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
     InstrInfo.reset(new R600InstrInfo(*this));
     TLInfo.reset(new R600TargetLowering(TM, *this));
+
+    // FIXME: Should have R600 specific FrameLowering
+    FrameLowering.reset(new AMDGPUFrameLowering(
+                          TargetFrameLowering::StackGrowsUp,
+                          MaxStackAlign,
+                          0));
   } else {
     InstrInfo.reset(new SIInstrInfo(*this));
     TLInfo.reset(new SITargetLowering(TM, *this));
+    FrameLowering.reset(new SIFrameLowering(
+                          TargetFrameLowering::StackGrowsUp,
+                          MaxStackAlign,
+                          0));
   }
 }