tree 1bb066347fe36f528bbffade1d6dff43cacd41a0
parent b4559296693c8ae022c19e6d1e42a09f21e6d84f
author Sam Clegg <sbc@chromium.org> 1538153414 +0000
committer Sam Clegg <sbc@chromium.org> 1538153414 +0000

[WebAssembly] Preserve function signatures during LTO

With LTO when and undefined function (with a known signature)
in replaced by a defined bitcode function we were loosing the
signature information (since bitcode functions don't have
signatures).

With this change we preserve the original signature from the
undefined function and verify that the post LTO compiled
function has the correct signature.

This change improves the error handling in the case where
there is a signature mismatch with a function defined in
a bitcode file.

Differential Revision: https://reviews.llvm.org/D50721

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@343340 91177308-0d34-0410-b5e6-96231b3b80d8