[llvm] 4135077 - [AMDGPU] use llvm_unreachable instead of default for rp set

[Stanislav Mekhanoshin via llvm-commits]

Author: Stanislav Mekhanoshin
Date: 2020-02-24T12:02:12-08:00
New Revision: 4135077e2694435d675e64ff95f167b4e27ba5c7

URL: https://github.com/llvm/llvm-project/commit/4135077e2694435d675e64ff95f167b4e27ba5c7
DIFF: https://github.com/llvm/llvm-project/commit/4135077e2694435d675e64ff95f167b4e27ba5c7.diff

LOG: [AMDGPU] use llvm_unreachable instead of default for rp set

GCC 9.2 seems to incorrectly issue warning about out of bounds
access. This situation should not happen in any way.

Differential Revision: https://reviews.llvm.org/D75071

Added: 
    

Modified: 
    llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
index 77100c3299d6..0b12e649e3e2 100644
--- a/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -1820,7 +1820,7 @@ unsigned SIRegisterInfo::getRegPressureSetLimit(const MachineFunction &MF,
     return getRegPressureLimit(&AMDGPU::SGPR_32RegClass,
                                const_cast<MachineFunction &>(MF));
 
-  return AMDGPUGenRegisterInfo::getRegPressureSetLimit(MF, Idx);
+  llvm_unreachable("Unexpected register pressure set!");
 }
 
 const int *SIRegisterInfo::getRegUnitPressureSets(unsigned RegUnit) const {