[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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251295 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MipsISelLowering.cpp

@@ -2952,9 +2952,9 @@ MipsTargetLowering::LowerFormalArguments(SDValue Chain,
   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(),

lib/Target/Mips/MipsSEFrameLowering.cpp

@@ -548,8 +548,8 @@ void MipsSEFrameLowering::emitInterruptPrologueStub(
   // 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 @@ void MipsSEFrameLowering::emitInterruptPrologueStub(
 
   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 =

test/CodeGen/Mips/interrupt-attr-64-error.ll

@@ -0,0 +1,9 @@
+; RUN: not llc -mcpu=mips64r6 -march=mipsel -relocation-model=static < %s 2>%t
+; RUN: FileCheck %s < %t
+
+; CHECK: LLVM ERROR: "interrupt" attribute is only supported for the O32 ABI on MIPS32R2+ at the present time.
+define i32 @isr_sw0() #0 {
+  ret i32 0
+}
+
+attributes #0 = { "interrupt"="sw0" }

test/CodeGen/Mips/interrupt-attr-64-fail.ll

@@ -1,11 +0,0 @@
-; RUN: llc -mcpu=mips64r6 -march=mipsel -relocation-model=static -o - %s | FileCheck %s
-; XFAIL: *
-
-define void @isr_sw0() #0 {
-  call void bitcast (void (...)* @write to void ()*)()
-}
-
-declare void @write(...)
-
-attributes #0 = { "interrupt"="sw0" }
-

test/CodeGen/Mips/interrupt-attr-args-error.ll

@@ -0,0 +1,9 @@
+; RUN: not llc -mcpu=mips32r2 -march=mipsel -relocation-model=static < %s 2> %t
+; RUN: FileCheck %s < %t
+
+; CHECK: LLVM ERROR: Functions with the interrupt attribute cannot have arguments!
+define i32 @isr_sw0(i8 signext %n) #0 {
+  ret i32 0
+}
+
+attributes #0 = { "interrupt"="sw0" }

test/CodeGen/Mips/interrupt-attr-args-fail.ll

@@ -1,11 +0,0 @@
-; RUN: llc -mcpu=mips32r2 -march=mipsel -relocation-model=static -o - %s | FileCheck %s
-; XFAIL: *
-
-define void @isr_sw0(i8 signext %n) #0 {
-  call void bitcast (void (...)* @write to void ()*)()
-}
-
-declare void @write(...)
-
-attributes #0 = { "interrupt"="sw0" }
-

test/CodeGen/Mips/interrupt-attr-error.ll

@@ -0,0 +1,9 @@
+; RUN: not llc -mcpu=mips32 -march=mipsel -relocation-model=static < %s 2>%t
+; RUN: FileCheck %s < %t
+
+; CHECK: LLVM ERROR: "interrupt" attribute is not supported on pre-MIPS32R2 or MIPS16 targets.
+define i32 @isr_sw0() #0 {
+  ret i32 0
+}
+
+attributes #0 = { "interrupt"="sw0" }

test/CodeGen/Mips/interrupt-attr-fail.ll

@@ -1,11 +0,0 @@
-; RUN: llc -mcpu=mips32 -march=mipsel -relocation-model=static -o - %s | FileCheck %s
-; XFAIL: *
-
-define void @isr_sw0() #0 {
-  call void bitcast (void (...)* @write to void ()*)()
-}
-
-declare void @write(...)
-
-attributes #0 = { "interrupt"="sw0" }
-