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Keith Randall bda1ef13f8 cmd/compile: fix memcombine pass for big endian, > 1 byte elements
The shift amounts were wrong in this case, leading to miscompilation
of load combining.

Also the store combining was not triggering when it should.

Fixes #64468

Change-Id: Iaeb08972c5fc1d6f628800334789c6af7216e87b
Reviewed-on: https://go-review.googlesource.com/c/go/+/546355
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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.github .github: clean up issue forms 2023-11-27 17:23:51 +00:00
api api: promote next to go1.22 2023-11-22 18:54:32 +00:00
doc go/types: set correct Var.scopePos for parameters/results 2023-11-30 01:15:55 +00:00
lib/time lib/time: update to 2023c/2023c 2023-05-03 20:14:11 +00:00
misc misc/wasm: support new wasmtime CLI 2023-11-19 21:11:54 +00:00
src cmd/compile: fix memcombine pass for big endian, > 1 byte elements 2023-11-30 18:35:50 +00:00
test cmd/compile: fix memcombine pass for big endian, > 1 byte elements 2023-11-30 18:35:50 +00:00
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