[llvm] r301165 - [Arch64AsmParser] better diagnostic for isb

[Sjoerd Meijer via llvm-commits]

Author: sjoerdmeijer
Date: Mon Apr 24 03:22:20 2017
New Revision: 301165

URL: http://llvm.org/viewvc/llvm-project?rev=301165&view=rev
Log:
[Arch64AsmParser] better diagnostic for isb

Instruction isb takes as an operand either 'sy' or an immediate value. This
improves the diagnostic when the string is not 'sy' and adds a test case for
this which was missing. This also adds tests to check invalid inputs for dsb
and dmb.

Differential Revision: https://reviews.llvm.org/D32227

Modified:
    llvm/trunk/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
    llvm/trunk/test/MC/AArch64/basic-a64-diagnostics.s

Modified: llvm/trunk/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp?rev=301165&r1=301164&r2=301165&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp (original)
+++ llvm/trunk/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp Mon Apr 24 03:22:20 2017
@@ -2473,16 +2473,14 @@ AArch64AsmParser::tryParseBarrierOperand
     return MatchOperand_ParseFail;
   }
 
-  auto DB = AArch64DB::lookupDBByName(Tok.getString());
-  if (!DB) {
-    TokError("invalid barrier option name");
-    return MatchOperand_ParseFail;
-  }
-
   // The only valid named option for ISB is 'sy'
-  if (Mnemonic == "isb" && DB->Encoding != AArch64DB::sy) {
+  auto DB = AArch64DB::lookupDBByName(Tok.getString());
+  if (Mnemonic == "isb" && (!DB || DB->Encoding != AArch64DB::sy)) {
     TokError("'sy' or #imm operand expected");
     return MatchOperand_ParseFail;
+  } else if (!DB) {
+    TokError("invalid barrier option name");
+    return MatchOperand_ParseFail;
   }
 
   Operands.push_back(AArch64Operand::CreateBarrier(

Modified: llvm/trunk/test/MC/AArch64/basic-a64-diagnostics.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/AArch64/basic-a64-diagnostics.s?rev=301165&r1=301164&r2=301165&view=diff
==============================================================================
--- llvm/trunk/test/MC/AArch64/basic-a64-diagnostics.s (original)
+++ llvm/trunk/test/MC/AArch64/basic-a64-diagnostics.s Mon Apr 24 03:22:20 2017
@@ -3273,29 +3273,41 @@
 
         dsb #-1
         dsb #16
+        dsb foo
         dmb #-1
         dmb #16
+        dmb foo
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         dsb #-1
 // CHECK-ERROR-NEXT:             ^
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         dsb #16
 // CHECK-ERROR-NEXT:             ^
+// CHECK-ERROR-NEXT: error: invalid barrier option name
+// CHECK-ERROR-NEXT:         dsb foo
+// CHECK-ERROR-NEXT:             ^
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         dmb #-1
 // CHECK-ERROR-NEXT:             ^
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         dmb #16
 // CHECK-ERROR-NEXT:             ^
+// CHECK-ERROR-NEXT: error: invalid barrier option name
+// CHECK-ERROR-NEXT:         dmb foo
+// CHECK-ERROR-NEXT:             ^
 
         isb #-1
         isb #16
+        isb foo
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         isb #-1
 // CHECK-ERROR-NEXT:             ^
 // CHECK-ERROR-NEXT: error: {{Invalid immediate for instruction|barrier operand out of range}}
 // CHECK-ERROR-NEXT:         isb #16
 // CHECK-ERROR-NEXT:             ^
+// CHECK-ERROR-NEXT: error: 'sy' or #imm operand expected
+// CHECK-ERROR-NEXT:        isb foo
+// CHECK-ERROR-NEXT:            ^
 
         msr daifset, x4
         msr spsel, #-1