en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll#95c7dd88 Revert "[Hexagon] Don't build two halves of HVX vector in parallel"This reverts commit ba07f300c6d67a2c6dde8eef216b7a77ac4600bb.A build-vector sequence is made of pairs: rotate+insert. When constructinga single vector, this results in a chain of 2*N instructions. The rotateoperation is a permute operation, but the insert uses a multiplicationresource: insert and rotate can execute in the same cycle, but obviouslythey cannot operate on the same vector. The original halving idea is stillbeneficial since it does allow for insert/rotate overlap, and for hidinginsert's latency. List of files: /llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll Thu, 30 Dec 2021 15:57:11 +0000 Krzysztof Parzyszek <kparzysz@quicinc.com> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll#ba07f300 [Hexagon] Don't build two halves of HVX vector in parallelThere can only be one permute operations per packet, so this actuallypessimizes the code (due to the extra "or"). List of files: /llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll Wed, 29 Dec 2021 19:00:01 +0000 Krzysztof Parzyszek <kparzysz@quicinc.com> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll#505d5748 [Hexagon] Improve BUILD_VECTOR codegenFor vectors with repeating values, old codegen would rotate and insertevery duplicate element. This patch replaces that behavior with a splatof the most common element, vinsert/vror only occur when needed. List of files: /llvm-project-15.0.7/llvm/test/CodeGen/Hexagon/autohvx/isel-build-vector.ll Wed, 29 Dec 2021 18:18:21 +0000 Joshua Herrera <joshherr@quicinc.com>