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Bug 1832022 - Reset to default -import-instr-limit threshold r=glandium

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The compiler may be imperfect but it evolves, and hard-coded threshold
don't. Plus according to prefherder, the impact on size is within
reasonable bounds.

Differential Revision: https://phabricator.services.mozilla.com/D178152
This commit is contained in:
serge-sans-paille 2023-05-23 12:15:48 +00:00
parent 0b0a150a4c
commit 41ac11b6d4
1 changed files with 0 additions and 10 deletions
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10
build/moz.configure/lto-pgo.configure
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@ -305,16 +305,6 @@ def lto(
ldflags.append("-flto=%s" % num_cores)
ldflags.append("-flifetime-dse=1")
# Tell LTO not to inline functions above a certain size, to mitigate
# binary size growth while still getting good performance.
# (For hot functions, PGO will put a multiplier on this limit.)
if target.os == "WINNT":
ldflags.append("-mllvm:-import-instr-limit=10")
elif target.os == "OSX":
ldflags.append("-Wl,-mllvm,-import-instr-limit=10")
elif c_compiler.type == "clang":
ldflags.append("-Wl,-plugin-opt=-import-instr-limit=10")
# If we're using the new pass manager, we can also enable the new PM
# during LTO. Further we can use the resulting size savings to increase
# the import limit in hot functions.