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MCAsmParser: add support for .err directive
The .err directive produces an error whenever it is assembled. This can be useful for preventing assembly when an unexpected condition occurs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201984 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -361,6 +361,7 @@ private:
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DK_CFI_REGISTER, DK_CFI_WINDOW_SAVE,
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DK_MACROS_ON, DK_MACROS_OFF, DK_MACRO, DK_ENDM, DK_ENDMACRO, DK_PURGEM,
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DK_SLEB128, DK_ULEB128,
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DK_ERR,
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DK_END
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};
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@ -471,6 +472,9 @@ private:
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// "end"
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bool parseDirectiveEnd(SMLoc DirectiveLoc);
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// "err"
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bool parseDirectiveErr(SMLoc DirectiveLoc);
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void initializeDirectiveKindMap();
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};
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}
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@ -1526,6 +1530,8 @@ bool AsmParser::parseStatement(ParseStatementInfo &Info) {
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return parseDirectivePurgeMacro(IDLoc);
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case DK_END:
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return parseDirectiveEnd(IDLoc);
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case DK_ERR:
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return parseDirectiveErr(IDLoc);
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}
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return Error(IDLoc, "unknown directive");
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@ -3931,6 +3937,15 @@ bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
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return false;
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}
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/// parseDirectiveErr
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/// ::= .err
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bool AsmParser::parseDirectiveErr(SMLoc Loc) {
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if (!TheCondStack.empty())
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if (TheCondStack.back().Ignore)
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return false;
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return Error(Loc, ".err encountered");
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}
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/// parseDirectiveEndIf
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/// ::= .endif
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bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
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@ -4054,6 +4069,7 @@ void AsmParser::initializeDirectiveKindMap() {
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DirectiveKindMap[".endm"] = DK_ENDM;
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DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
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DirectiveKindMap[".purgem"] = DK_PURGEM;
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DirectiveKindMap[".err"] = DK_ERR;
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}
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MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
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19
test/MC/AsmParser/directive-err.s
Normal file
19
test/MC/AsmParser/directive-err.s
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@ -0,0 +1,19 @@
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// RUN: not llvm-mc -triple i386 %s 2>&1 | FileCheck %s
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.err
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// CHECK: error: .err encountered
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// CHECK-NEXT: .err
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// CHECK-NEXT: ^
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.ifc a,a
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.err
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.endif
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// CHECK: error: .err encountered
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// CHECK-NEXT: .err
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// CHECK-NEXT: ^
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.ifnc a,a
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.err
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.endif
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// CHECK-NOT: error: .err encountered
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