[PATCH] D70783: AMDGPU: Fixed indeterminate map iteration in SIPeepholeSDWA

[Tim Renouf via Phabricator via llvm-commits]

tpr added a comment.

In D70783#1762087 <https://reviews.llvm.org/D70783#1762087>, @rampitec wrote:

> Did the problem manifest in any way?


I had a couple of big graphics shaders that generated different but still correct code due to registers being allocated in a different order, depending on whether I had some other change in the front-end compiler that only affected IR metadata, and the difference only happened on one of two machines I tried it on. I spotted it because I had a bunch of front-end compiler changes that were not supposed to affect output code, and I was testing that by compiling as much stuff as I could with before-change and after-change compilers.


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  https://reviews.llvm.org/D70783/new/

https://reviews.llvm.org/D70783