Backport 3e6b904f0a5075a3f33683ce38b5a4fd18280e5e to the release/14.x branch

[phoebewang]

Trunings for several GLC instructions. It's better to backport to LLVM14.

3e6b904

[llvmbot]

@llvm/issue-subscribers-backend-x86

[phoebewang]

/cherry-pick 3e6b904

[llvmbot]

Failed to cherry-pick: 3e6b904

https://github.com/llvm/llvm-project/actions/runs/2231053176

Please manually backport the fix and push it to your github fork. Once this is done, please add a comment like this:

/branch <user>/<repo>/<branch>

[phoebewang]

/branch phoebewang/llvm-project/release/14.x

[phoebewang]

@tstellar The /branch command didn't work?

[tstellar]

/branch phoebewang/llvm-project/release/14.x

[llvmbot]

/pull-request llvmbot#196