[mips] Check for the correct error message in tests for interrupt attributes.

Instead of XFAIL-ing the tests with the wrong usage of the "interrupt"
attribute, we should check that we emit the correct error messages to
the user.

llvm-svn: 251295
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index a36725a..7e8bccd 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -2952,9 +2952,9 @@
   const Function *Func = DAG.getMachineFunction().getFunction();
   Function::const_arg_iterator FuncArg = Func->arg_begin();
 
-  if (Func->hasFnAttribute("interrupt"))
-    assert(Func->arg_empty() &&
-           "Functions with the interrupt attribute cannot have arguments!");
+  if (Func->hasFnAttribute("interrupt") && !Func->arg_empty())
+    report_fatal_error(
+        "Functions with the interrupt attribute cannot have arguments!");
 
   CCInfo.AnalyzeFormalArguments(Ins, CC_Mips_FixedArg);
   MipsFI->setFormalArgInfo(CCInfo.getNextStackOffset(),
diff --git a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
index 70f4a63..297e7a2 100644
--- a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
@@ -548,8 +548,8 @@
   // clearing is not provided so reject that configuration.
   if (!STI.hasMips32r2())
     report_fatal_error(
-        "\"interrupt\" attribute is not supported on pre-r2 MIPS or"
-        "Mips16 targets.");
+        "\"interrupt\" attribute is not supported on pre-MIPS32R2 or "
+        "MIPS16 targets.");
 
   // The GP register contains the "user" value, so we cannot perform
   // any gp relative loads until we restore the "kernel" or "system" gp
@@ -561,7 +561,7 @@
 
   if (!STI.isABI_O32() || STI.hasMips64())
     report_fatal_error("\"interrupt\" attribute is only supported for the "
-                       "O32 ABI on MIPS32r2+ at the present time.");
+                       "O32 ABI on MIPS32R2+ at the present time.");
 
   // Perform ISR handling like GCC
   StringRef IntKind =