[Assembler] Improve diagnostics for inline assembly.
Summary:
Keep a vector of LocInfos around; one for each call to EmitInlineAsm.
Since each call to EmitInlineAsm creates a new buffer in the inline asm
SourceMgr, we can use the buffer number to map to the right LocInfo.
Reviewers: rengolin, grosbach, rnk, echristo
Reviewed By: rnk
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D29769
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294947
91177308-0d34-0410-b5e6-
96231b3b80d8
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