dfmc-llvm-back-end: Simplify left shift overflow detection #1369
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* sources/dfmc/llvm-back-end/llvm-primitives-machine-word.dylan (primitive-machine-word-shift-left-signal-overflow): Check for overflow by performing the needed shfit, shifting that back, and comparing the result with the original value to ensure no bits were lost.
cgay
approved these changes
Jan 4, 2021
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This change refines the fix made in PR #1256, simplifying the generated code slightly.