[llvm] [X86] Require legal result types for f32 estimates (PR #217810)

[Simon Pilgrim via llvm-commits]

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+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --filter "CALL64pcrel32|:gr32 = COPY \$eax|MOV32mr|:gr64 = COPY|\$rax = COPY|\$eax = COPY|RET" --version 6
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RKSimon wrote:

I'm always suspicious of excessive filtering - it suggests messy codegen is being hidden

https://github.com/llvm/llvm-project/pull/217810