[llvm] r356972 - X86AsmParser: Do not process a non-existent token

[Craig Topper via llvm-commits]

Author: ctopper
Date: Mon Mar 25 20:12:41 2019
New Revision: 356972

URL: http://llvm.org/viewvc/llvm-project?rev=356972&view=rev
Log:
X86AsmParser: Do not process a non-existent token

This error can only happen if an unfinished operation is at Eof.

Patch by Brandon Jones

Differential Revision: https://reviews.llvm.org/D57379

Added:
    llvm/trunk/test/MC/AsmParser/unfinished-op.s
Modified:
    llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
    llvm/trunk/test/MC/X86/x86_operands.s

Modified: llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp?rev=356972&r1=356971&r2=356972&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp Mon Mar 25 20:12:41 2019
@@ -2992,6 +2992,11 @@ bool X86AsmParser::MatchAndEmitATTInstru
   case Match_MnemonicFail:
     break;
   }
+  if (Op.getToken().empty()) {
+    Error(IDLoc, "instruction must have size higher than 0", EmptyRange,
+          MatchingInlineAsm);
+    return true;
+  }
 
   // FIXME: Ideally, we would only attempt suffix matches for things which are
   // valid prefixes, and we could just infer the right unambiguous

Added: llvm/trunk/test/MC/AsmParser/unfinished-op.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/AsmParser/unfinished-op.s?rev=356972&view=auto
==============================================================================
--- llvm/trunk/test/MC/AsmParser/unfinished-op.s (added)
+++ llvm/trunk/test/MC/AsmParser/unfinished-op.s Mon Mar 25 20:12:41 2019
@@ -0,0 +1,4 @@
+# RUN: not llvm-mc -triple i386-unknown-unknown %s 2>&1 > /dev/null| FileCheck %s --check-prefix=CHECK-ERROR
+
+#CHECK-ERROR: error: instruction must have size higher than 0
+    .byte 64;""

Modified: llvm/trunk/test/MC/X86/x86_operands.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/X86/x86_operands.s?rev=356972&r1=356971&r2=356972&view=diff
==============================================================================
--- llvm/trunk/test/MC/X86/x86_operands.s (original)
+++ llvm/trunk/test/MC/X86/x86_operands.s Mon Mar 25 20:12:41 2019
@@ -9,7 +9,7 @@
         addl $a, %eax
 # CHECK: addl $3, %eax
         addl $1 + 2, %eax
-        
+
 # Disambiguation
 
 # CHECK: addl $1, 8
@@ -26,7 +26,7 @@
         addl $1, (%eax)
 # CHECK: addl $1, 8(,%eax)
         addl $1, (4+4)(,%eax)
-        
+
 # Indirect Memory Operands
 # CHECK: addl $1, 1(%eax)
         addl $1, 1(%eax)