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DAG: correctly legalize UMULO. #85
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We were incorrectly sign extending into the high word (as you would for SMULO) when legalizing UMULO in terms of a wider full multiplication. Patch by James Duley. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305800 91177308-0d34-0410-b5e6-96231b3b80d8
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arielb1
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DAG: correctly legalize UMULO.
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This fixes unsigned multiplication with overflow when one of the operands is greater than max signed for some targets, notably thumbv6m.
Should fix rust-lang/compiler-builtins#150
We were incorrectly sign extending into the high word (as you would for
SMULO) when legalizing UMULO in terms of a wider full multiplication.
Patch by James Duley.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305800 91177308-0d34-0410-b5e6-96231b3b80d8