Anthony Latsis 3d898f71e5 SwiftCompilerSources/SIL: More robust IntegerLiteralInst construction ...

ac619010e3 backfired when building the
stdlib on rebranch. This time the problem is reversed: we should be
interpreting an integer as unsigned where we no longer do, here:
8f7af45115/SwiftCompilerSources/Sources/Optimizer/InstructionSimplification/SimplifyLoad.swift (L78).

Rather than treating integers as signed by default, make
`Builder.createIntegerLiteral` accept a generic `FixedWidthInteger`, and
manipulate the value based on the generic type argument's signedness.

This doesn't entirely define away unintentional sign extensions, but
makes this mistake of humouring the parameter type less likely.

2025-09-25 08:05:57 +01:00

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