[AMDGPU] Fix number of reserved SGPRs on CI to reflect flat scratch use

Differential Revision: https://reviews.llvm.org/D27225

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289095 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/AMDGPU/SIRegisterInfo.cpp b/lib/Target/AMDGPU/SIRegisterInfo.cpp
index 4bc605322f5d38e142c05035edbc78fb0f3ceccb..440ce1b4fc4ddbe58f5b3a742268c4fc374c299a 100644 (file)
--- a/lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ b/lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -1181,6 +1181,8 @@ unsigned SIRegisterInfo::getNumAddressableSGPRs(const SISubtarget &ST) const {
 unsigned SIRegisterInfo::getNumReservedSGPRs(const SISubtarget &ST) const {
   if (ST.getGeneration() >= AMDGPUSubtarget::VOLCANIC_ISLANDS)
     return 6; // VCC, FLAT_SCRATCH, XNACK.
+  if (ST.getGeneration() >= AMDGPUSubtarget::SEA_ISLANDS)
+    return 4; // VCC, FLAT_SCRATCH.
   return 2; // VCC.
 }