[KeyInstr] Enable Key Instructions support in LLVM #144324
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Set LLVM_EXPERIMENTAL_KEY_INSTRUCTIONS=ON by default. This enables support for Key Instructions in LLVM by default, it does not enable the feature by default. This does have an affect on compile time, which looks to have mostly been "paid for" (if that argument stands) by my PR llvm#143399. From compile-time-tracker: 1. this patch 2. PR llvm#143399 3. base ``` Commit stage1-O3 stage1-ReleaseThinLTO stage1-ReleaseLTO-g stage1-O0-g stage1-aarch64-O3 stage1-aarch64-O0-g stage2-O3 stage2-O0-g stage2-clang 1. 61213M (+0.02%) 77397M (+0.01%) 89413M (+0.08%) 18865M (+0.13%) 68670M (+0.01%) 23100M (+0.12%) 53409M (+0.00%) 16550M (+0.20%) 34060797M (+0.02%) 2. 61201M (-0.01%) 77389M (+0.00%) 89343M (-0.06%) 18841M (-0.16%) 68666M (+0.00%) 23073M (-0.16%) 53408M (-0.01%) 16518M (+0.01%) 34054978M (+0.00%) 3. 61207M (+0.00%) 77386M (-0.01%) 89396M (-0.02%) 18871M (-0.02%) 68665M (+0.01%) 23109M (+0.02%) 53415M (-0.02%) 16516M (-0.00%) 34054300M (-0.00%) ``` Compare 2-1: https://llvm-compile-time-tracker.com/compare.php?from=89490929c34f45842df1588cf78d836f51c2c222&to=7d00712c28bbcc8a8e00d672f2f7c109fb5823c9&stat=instructions%3Au Compare 3-2: https://llvm-compile-time-tracker.com/compare.php?from=2b7b0e178259a910355631d7d648c89052000872&to=89490929c34f45842df1588cf78d836f51c2c222&stat=instructions%3Au
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Set LLVM_EXPERIMENTAL_KEY_INSTRUCTIONS=ON by default. This enables support for Key Instructions in LLVM by default, it does not enable the feature by default.
This does have an affect on compile time, which looks to have mostly been "paid for" (if that argument stands) by my PR #143399.
From compile-time-tracker:
Compare 2-1: https://llvm-compile-time-tracker.com/compare.php?from=89490929c34f45842df1588cf78d836f51c2c222&to=7d00712c28bbcc8a8e00d672f2f7c109fb5823c9&stat=instructions%3Au
Compare 3-2: https://llvm-compile-time-tracker.com/compare.php?from=2b7b0e178259a910355631d7d648c89052000872&to=89490929c34f45842df1588cf78d836f51c2c222&stat=instructions%3Au