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Author SHA1 Message Date
Derek Schuff e2688c432f [WebAssembly] Use LEB encoding for value types 
Previously we were using the encoded LEB hex values
for the value types.  This change uses the decoded
negative value and the LEB encoder to write them out.

Differential Revision: https://reviews.llvm.org/D30847

Patch by Sam Clegg

llvm-svn: 297777
 2017-03-14 20:23:22 +00:00
Dan Gohman d37dc2f773 [WebAssembly] Add some comments and tidy up whitespace. 
llvm-svn: 296402
 2017-02-27 22:41:39 +00:00
Dan Gohman 38b42b4a95 [WebAssembly] Define a table of function signatures for runtime library calls. 
LLVM CodeGen emits references to external symbols that are never declared in
LLVM IR level, so they have no declared signature. However, WebAssembly requires
all functions be declared with signatures. This patch adds a table for providing
signatures for known runtime libcalls that will be used in subsequent patches to
emit declarations for such functions.

llvm-svn: 295857
 2017-02-22 18:34:16 +00:00