[AMDGPU] Add a missing COV6 case to getAMDHSACodeObjectVersion() (#87492)

Author: epilk

llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp

@@ -182,6 +182,8 @@ unsigned getAMDHSACodeObjectVersion(unsigned ABIVersion) {
     return 4;
   case ELF::ELFABIVERSION_AMDGPU_HSA_V5:
     return 5;
+  case ELF::ELFABIVERSION_AMDGPU_HSA_V6:
+    return 6;
   default:
     return getDefaultAMDHSACodeObjectVersion();
   }

llvm/test/tools/llvm-objdump/ELF/AMDGPU/kd-cov5.s

@@ -6,6 +6,13 @@
 ; RUN:   | llvm-mc --triple=amdgcn-amd-amdhsa -mcpu=gfx1010 -mattr=-xnack,+wavefrontsize32,-wavefrontsize64 -filetype=obj > %t.o
 ; RUN: llvm-objdump --disassemble-symbols=kernel.kd %t.o | FileCheck %s --check-prefixes=COV4,CHECK
 
+;; Make sure we override the default COV in the disassembler on COV6 (there
+;; currently aren't any differences between 5 and 6, so set the default to 4 so
+;; we can verify that the default is at least overridden)
+; RUN: sed 's/CODE_OBJECT_VERSION/6/g' %s \
+; RUN:   | llvm-mc --triple=amdgcn-amd-amdhsa -mcpu=gfx1010 -mattr=-xnack,+wavefrontsize32,-wavefrontsize64 -filetype=obj > %t.o
+; RUN: llvm-objdump -mllvm --amdhsa-code-object-version=4 --disassemble-symbols=kernel.kd %t.o | FileCheck %s --check-prefixes=COV5,CHECK
+
 ;; Verify that .amdhsa_uses_dynamic_stack is only printed on COV5+.
 
 ; CHECK: .amdhsa_kernel kernel