[AMDGPU] Adjust number of SGPRs available in Calling Convention

This reduces the number of SGPRs due to some concerns about running
out of SGPRs if you make all the SGPRs that aren't reserved available
for the calling convention.

Change-Id: Idb4ca4dc72f5b6808cb524ff7270915a8de5b4c1
llvm-svn: 370215

1 files changed, 4 insertions, 14 deletions

diff --git a/llvm/lib/CodeGen/CallingConvLower.cpp b/llvm/lib/CodeGen/CallingConvLower.cpp
index 92da621fabb..39eabd92690 100644
--- a/llvm/lib/CodeGen/CallingConvLower.cpp
+++ b/llvm/lib/CodeGen/CallingConvLower.cpp
@@ -89,13 +89,8 @@ CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
   for (unsigned i = 0; i != NumArgs; ++i) {
     MVT ArgVT = Ins[i].VT;
     ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
-    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
-#ifndef NDEBUG
-      dbgs() << "Formal argument #" << i << " has unhandled type "
-             << EVT(ArgVT).getEVTString() << '\n';
-#endif
-      llvm_unreachable(nullptr);
-    }
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this))
+      report_fatal_error("unable to allocate function argument #" + Twine(i));
   }
 }
 
@@ -121,13 +116,8 @@ void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
   for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
     MVT VT = Outs[i].VT;
     ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
-    if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
-#ifndef NDEBUG
-      dbgs() << "Return operand #" << i << " has unhandled type "
-             << EVT(VT).getEVTString() << '\n';
-#endif
-      llvm_unreachable(nullptr);
-    }
+    if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
+      report_fatal_error("unable to allocate function return #" + Twine(i));
   }
 }