[all-commits] [llvm/llvm-project] 10d9e7: Reapply "[WebAssembly] Constant fold wasm.dot" (#1...

[Jasmine Tang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 10d9e7b1b7913586bb2663cba57c6e25f68a404f
      https://github.com/llvm/llvm-project/commit/10d9e7b1b7913586bb2663cba57c6e25f68a404f
  Author: Jasmine Tang <jjasmine at igalia.com>
  Date:   2025-08-14 (Thu, 14 Aug 2025)

  Changed paths:
    M llvm/lib/Analysis/ConstantFolding.cpp
    A llvm/test/Transforms/InstSimplify/ConstProp/WebAssembly/dot.ll

  Log Message:
  -----------
  Reapply "[WebAssembly] Constant fold wasm.dot" (#153070)

In #149619, for the test of `@dot_follow_modulo_spec_2`, constant
folding the addition of two i32 1073741824 causes an overflow from 2^32
to -2^32=-2147483648, which triggers the UB sanitizer. This PR reapplies
the previous PR, explicitly casting the addition operand to int64_t
first before performing the addition before producing a int32 number via
`Constant *C = get(cast<IntegerType>(Ty->getScalarType()), V, isSigned)`



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