tree 4d6d02d3da6b2b8aced521d5f39879991b1e74be
parent a826459b5e251896674675a86ca45a2297a415c5
author Matt Arsenault <Matthew.Arsenault@amd.com> 1552424574 +0000
committer Matt Arsenault <Matthew.Arsenault@amd.com> 1552424574 +0000

IR: Add immarg attribute

This indicates an intrinsic parameter is required to be a constant,
and should not be replaced with a non-constant value.

Add the attribute to all AMDGPU and generic intrinsics that comments
indicate it should apply to. I scanned other target intrinsics, but I
don't see any obvious comments indicating which arguments are intended
to be only immediates.

This breaks one questionable testcase for the autoupgrade. I'm unclear
on whether the autoupgrade is supposed to really handle declarations
which were never valid. The verifier fails because the attributes now
refer to a parameter past the end of the argument list.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@355981 91177308-0d34-0410-b5e6-96231b3b80d8