Make codegen coverage_context optional, and check #78300
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Addresses Issue rust-lang#78286 Libraries compiled with coverage and linked with out enabling coverage would fail when attempting to add the library's coverage statements to the codegen coverage context (None). Now, if coverage statements are encountered while compiling / linking with `-Z instrument-coverage` disabled, codegen will *not* attempt to add code regions to a coverage map, and it will not inject the LLVM instrprof_increment intrinsic calls.
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Oct 23, 2020
Co-authored-by: Wesley Wiser <wwiser@gmail.com>
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…as-schievink Rollup of 15 pull requests Successful merges: - rust-lang#76649 (Add a spin loop hint for Arc::downgrade) - rust-lang#77392 (add `insert` to `Option`) - rust-lang#77716 (Revert "Allow dynamic linking for iOS/tvOS targets.") - rust-lang#78109 (Check for exhaustion in RangeInclusive::contains and slicing) - rust-lang#78198 (Simplify assert terminator only if condition evaluates to expected value) - rust-lang#78243 (--test-args flag description) - rust-lang#78249 (improve const infer error) - rust-lang#78250 (Document inline-const) - rust-lang#78264 (Add regression test for issue-77475) - rust-lang#78274 (Update description of Empty Enum for accuracy) - rust-lang#78278 (move `visit_predicate` into `TypeVisitor`) - rust-lang#78292 (Loop instead of recursion) - rust-lang#78293 (Always store Rustdoc theme when it's changed) - rust-lang#78300 (Make codegen coverage_context optional, and check) - rust-lang#78307 (Revert "Set .llvmbc and .llvmcmd sections as allocatable") Failed merges: r? `@ghost`
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Addresses Issue #78286
Libraries compiled with coverage and linked with out enabling coverage
would fail when attempting to add the library's coverage statements to
the codegen coverage context (None).
Now, if coverage statements are encountered while compiling / linking
with
-Z instrument-coveragedisabled, codegen will not attempt toadd code regions to a coverage map, and it will not inject the LLVM
instrprof_increment intrinsic calls.