RegAllocFast: Avoid using temporary DiagnosticInfo (#120184)

This reverts commit 1297933.

Author: arsenm

llvm/lib/CodeGen/RegAllocFast.cpp

@@ -1206,10 +1206,9 @@ MCPhysReg RegAllocFastImpl::getErrorAssignment(const LiveReg &LR,
           "inline assembly requires more registers than available");
     } else {
       const Function &Fn = MBB->getParent()->getFunction();
-      DiagnosticInfoRegAllocFailure DI(
+      Fn.getContext().diagnose(DiagnosticInfoRegAllocFailure(
           "ran out of registers during register allocation", Fn,
-          MI.getDebugLoc());
-      Fn.getContext().diagnose(DI);
+          MI.getDebugLoc()));
     }
   }
 

llvm/test/CodeGen/AMDGPU/ran-out-of-registers-error-all-regs-reserved.ll

@@ -1,4 +1,3 @@
-; UNSUPPORTED: target={{.*}}
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=greedy -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=basic -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -vgpr-regalloc=fast -verify-machineinstrs=0 -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error %s

llvm/test/CodeGen/AMDGPU/ran-out-of-registers-errors.ll

@@ -1,5 +1,3 @@
-; UNSUPPORTED: target={{.*}}
-;
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=greedy -filetype=null %s 2>&1 | FileCheck -check-prefixes=CHECK,GREEDY -implicit-check-not=error %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=basic -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error -check-prefixes=CHECK,BASIC %s
 ; RUN: not llc -mtriple=amdgcn-amd-amdhsa -stress-regalloc=1 -vgpr-regalloc=fast -filetype=null %s 2>&1 | FileCheck -implicit-check-not=error -check-prefixes=CHECK,FAST %s