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Fix the assembler to print a better relocatable expression error

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diagnostic that includes location information.

Currently if one has this assembly:

	.quad (0x1234 + (4 * SOME_VALUE))

where SOME_VALUE is undefined ones gets the less than
useful error message with no location information:

% clang -c x.s
clang -cc1as: fatal error: error in backend: expected relocatable expression

With this fix one now gets a more useful error message
with location information:

% clang -c x.s 
x.s:5:8: error: expected relocatable expression
 .quad (0x1234 + (4 * SOME_VALUE))
       ^

To do this I plumbed the SMLoc through the MCObjectStreamer
EmitValue() and EmitValueImpl() interfaces so it could be used
when creating the MCFixup.

rdar://12391022


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206906 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kevin Enderby
2014-04-22 17:27:29 +00:00
parent 795e462cc4
commit 29c96f133e
14 changed files with 40 additions and 19 deletions
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3
lib/MC/MCNullStreamer.cpp
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@@ -70,7 +70,8 @@ namespace {
uint64_t Size, unsigned ByteAlignment) override {}
void EmitBytes(StringRef Data) override {}
void EmitValueImpl(const MCExpr *Value, unsigned Size) override {}
void EmitValueImpl(const MCExpr *Value, unsigned Size,
const SMLoc &Loc = SMLoc()) override {}
void EmitULEB128Value(const MCExpr *Value) override {}
void EmitSLEB128Value(const MCExpr *Value) override {}
void EmitGPRel32Value(const MCExpr *Value) override {}