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2016 Jul 19
3
X86ISelLowering: Promote 'add nsw' to a wider type
Hi Sanjay,
Some time ago you implemented a sext(add_nsw(x, C)) --> add(sext(x), C_sext) transformation in X86ISelLowering
https://reviews.llvm.org/D13757
Is there any reason why this transformation is limited to sexts and doesn’t support zexts?
Thanks,
Artur
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2016 Aug 08
2
X86ISelLowering: Promote 'add nsw' to a wider type
...he backend fixups...or it could make them harder. Are there bug reports for the cases that you are looking at?
On Tue, Jul 19, 2016 at 9:13 AM, Artur Pilipenko <apilipenko at azulsystems.com<mailto:apilipenko at azulsystems.com>> wrote:
Hi Sanjay,
Some time ago you implemented a sext(add_nsw(x, C)) --> add(sext(x), C_sext) transformation in X86ISelLowering
https://reviews.llvm.org/D13757
Is there any reason why this transformation is limited to sexts and doesn’t support zexts?
Thanks,
Artur
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