LLVM: make SSE4.2 imply +popcnt
For consistency with the NCG as well as with Clang and GCC, we make the SSE4.2 feature flag imply +popcnt when using the LLVM backend. Fixes #25353
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- compiler/GHC/Driver/Pipeline/Execute.hs 4 additions, 0 deletionscompiler/GHC/Driver/Pipeline/Execute.hs
- testsuite/tests/llvm/should_compile/T25353.asm 1 addition, 0 deletionstestsuite/tests/llvm/should_compile/T25353.asm
- testsuite/tests/llvm/should_compile/T25353.hs 10 additions, 0 deletionstestsuite/tests/llvm/should_compile/T25353.hs
- testsuite/tests/llvm/should_compile/all.T 1 addition, 0 deletionstestsuite/tests/llvm/should_compile/all.T
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