MCAsmParser: support .ifne

The .ifne directive assembles the following section of code if the argument
expression is non-zero.  Effectively, it is equivalent to if.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201986 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index fb854c918d4660d1ccfaa706ae3cb34f18385141..aa261c102a98b89c810714aa3b4749f60838974a 100644 (file)
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -350,8 +350,8 @@ private:
     DK_REFERENCE, DK_WEAK_DEFINITION, DK_WEAK_REFERENCE,
     DK_WEAK_DEF_CAN_BE_HIDDEN, DK_COMM, DK_COMMON, DK_LCOMM, DK_ABORT,
     DK_INCLUDE, DK_INCBIN, DK_CODE16, DK_CODE16GCC, DK_REPT, DK_IRP, DK_IRPC,
-    DK_IF, DK_IFB, DK_IFNB, DK_IFC, DK_IFNC, DK_IFDEF, DK_IFNDEF, DK_IFNOTDEF,
-    DK_ELSEIF, DK_ELSE, DK_ENDIF,
+    DK_IF, DK_IFNE, DK_IFB, DK_IFNB, DK_IFC, DK_IFNC, DK_IFDEF, DK_IFNDEF,
+    DK_IFNOTDEF, DK_ELSEIF, DK_ELSE, DK_ENDIF,
     DK_SPACE, DK_SKIP, DK_FILE, DK_LINE, DK_LOC, DK_STABS,
     DK_CFI_SECTIONS, DK_CFI_STARTPROC, DK_CFI_ENDPROC, DK_CFI_DEF_CFA,
     DK_CFI_DEF_CFA_OFFSET, DK_CFI_ADJUST_CFA_OFFSET, DK_CFI_DEF_CFA_REGISTER,
@@ -438,7 +438,8 @@ private:
   bool parseDirectiveInclude(); // ".include"
   bool parseDirectiveIncbin(); // ".incbin"
 
-  bool parseDirectiveIf(SMLoc DirectiveLoc); // ".if"
+  // ".if" or ".ifne"
+  bool parseDirectiveIf(SMLoc DirectiveLoc);
   // ".ifb" or ".ifnb", depending on ExpectBlank.
   bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
   // ".ifc" or ".ifnc", depending on ExpectEqual.
@@ -1230,6 +1231,7 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info) {
   default:
     break;
   case DK_IF:
+  case DK_IFNE:
     return parseDirectiveIf(IDLoc);
   case DK_IFB:
     return parseDirectiveIfb(IDLoc, true);
@@ -3766,6 +3768,7 @@ bool AsmParser::parseDirectiveIncbin() {
 
 /// parseDirectiveIf
 /// ::= .if expression
+/// ::= .ifne expression
 bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc) {
   TheCondStack.push_back(TheCondState);
   TheCondState.TheCond = AsmCond::IfCond;
@@ -4025,6 +4028,7 @@ void AsmParser::initializeDirectiveKindMap() {
   DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
   DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
   DirectiveKindMap[".if"] = DK_IF;
+  DirectiveKindMap[".ifne"] = DK_IFNE;
   DirectiveKindMap[".ifb"] = DK_IFB;
   DirectiveKindMap[".ifnb"] = DK_IFNB;
   DirectiveKindMap[".ifc"] = DK_IFC;

diff --git a/test/MC/AsmParser/conditional_asm.s b/test/MC/AsmParser/conditional_asm.s
index f619ef9bb428a4fe53958d961a8a8f6020375dfe..b9bee33c6a1626f221b5857f56563d5ad44b8c7b 100644 (file)
--- a/test/MC/AsmParser/conditional_asm.s
+++ b/test/MC/AsmParser/conditional_asm.s
@@ -10,3 +10,12 @@
         .byte 0
     .endif
 .endif
+
+# CHECK: .byte 1
+# CHECK-NOT: .byte 0
+.ifne 32 - 32
+       .byte 0
+.else
+       .byte 1
+.endif
+