[llvm] [LAA] Prepare to handle diff type sizes (NFC) (PR #122318)
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Wed Sep 24 06:32:59 PDT 2025
KennethHilmersson wrote:
We see a regression with this patch when we compile with -fno-strict-aliasing.
There is a runtime memory check block added and the scalar loop remains with the patch:
[fno-strict-aliasing example](https://godbolt.org/#z:OYLghAFBqd5QCxAYwPYBMCmBRdBLAF1QCcAaPECAMzwBtMA7AQwFtMQByARg9KtQYEAysib0QXACx8BBAKoBnTAAUAHpwAMvAFYTStJg1AB9U8lJL6yAngGVG6AMKpaAVxYM9DgDJ4GmADl3ACNMYgkAJlIAB1QFQlsGZzcPPVj4mwFffyCWUPCuKMtMa0ShAiZiAmT3Ty4LTCtMhnLKgmzAkLDIiwqqmtT6hT72v0687sKASgtUV2Jkdg4AagBSCIBmP2Q3LFWNxz8CAgBPaMwFADoEfexVjQBBe4eAN1Q8dGX%2BVAgjjYjjAQAFTLPzGaJTZ6rADsACFnstEaDBFwAGyAkFzAjgtYbAAiy1%2BKPRwKmYOi%2B3hj3WG2ixCYwBYTGWDDmDGILloCKR/GIRIIoNxBI0lMF%2B0cy3%2Borw63hEVhkMeSMRMKpD2VSKx4NWAFZYTKdQT9gTybr9bq8ZTuUiYZbqdC7Q8ODNaJwdbxPBwtKRUJwJQo5gtMGtNjxSARNM6ZgBrCQADkucakAE44xFUVJURoIjqItJXRxJB7Iz7OLwFCANOHIzM4LAkGgWNE6GFyJRG836OFkDtDMBAcRXAxo3w6AQwhWIMES8E/JUTpww7PmMQTgB5YLaEoR7i8RtsQRrhi0Bde3hYYKuYCOMS0Cu70hYJlGcRnx94YjbvAvC4lzCqEpXHHRdeCORoS1oPBgnpVdnCwEsCGIPAWBLH9iGCOJMDxTBn2ASCjBrPgDGABQADU8EwAB3Ndzk9MN%2BEEEQxHYKQZEERQVHUN9dCiAwCNMYxzEg4IK0gGZUGiZp7wAWjXDZlmkqhWWk4YkOsaSxDwJh4iMXhUDQpCsFEiAZmKUo7AgBwBjqUgfDGXJ8jSOIEgEaynIyRIOgcyYGiaMoRjcoZGi/ARWiqLyugKXo2kC6LwvsyKJFMwNFiS/Q3WLN9fRWVQ41RaTUUkZZeyMQlEKHaMpkJXBCBIEMNi4KZeB3LQphjeNLg2SQdQayQuC4DZoR1ZM%2BrjdLC14FCuA0KtPW9bLy0rasz1rGBEBAD82wgDhFOU/AFFEYh0Gkl4xFcTBpOYNgFA4EsOxbYgAlYJZcvywrir44AysHYcmsfHC%2B3oFSTjyFx729TB8CIQy9BoWhx2IDTjiQy9x3B3g4YR6T90YAh0dHeGwmki8r2kvx%2BBLTGib8VTXHMhhpLYCp0CYCpKdkJjxFYhj5CUNQSx43yQs8SyGCcFxai8MWIomKL0hcpIJcGGJnOaGXHKCvzQoCpWbLM5owtGHJEqGHWUj1kZ1cmGZEMwTAPiWyj6WiECXQy0g5r0zhvG8UiAFllgASQAJWWciqLCZZXoKoqSq%2BiByt%2B6qobqml6mWZwmwe%2BqIj%2Blqo1IWMIg0S4ImhSR/mhNNkx1OMNmTeoCyLD2SwWiwlvz1b4AgBtUCzrstvursUDjiJ%2BqrKniEnac32XecQNIOfVw3LdrAXnHD2PU9vRJ69b3vMMn0BpYd4/L8f3x/9AOAh8wILb1hJgk44JP5qkJQh80IwpRsNw/DQBWkRBkZEKLUVogvHmnMWLSB5hxfm3E9CfRAAJISUFjLiUkokGSckFJKVQCpRCeB1KaW0n4YAekDIfF/GJIW9N7Bi1inZY2st3IK1ivLNWCUWGa2FobWK%2Bt/JtCtlFYYMVdZ6FEfFZhGtkrzFSo1ca7oW5ZU4FHPKMcPp9mWGPS4XBLgaGTrVYg9VGrNRrO1LgyZLhZmTGPDQcYHGWIcaicazdPalg4ItKsndSB1nWptCg21dr4P2odY6p03AXSuhcW6b4h5hCemwTg0d3px20XovRO8AYvgugoEGGE7x/hTjDeok8kaENRr%2BN8ZSN540pmOImu8yYMAptUhpiMablXpozTAzNWZMHZoxUQXMYGyDgVxb0ugeF0NFuLc2Ut0DCNYc0dhqtPJcI1rQg2ZtJbTO2UIjZPlJHVHEabA50jrbhk/PbdAjtnau0UZlea3tfYBxDmHUBkcUmx0%2Buk3R%2BjDHQxMaQDOfdOyRzTnncxhcQARAiJcGuGZCo6h6nGFFEQHGuKeV7Tx7dvHQoLBEbFHizErRmGheIdhJBAA%3D)
https://github.com/llvm/llvm-project/pull/122318
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