[llvm] [AMDGPU] Update base addr of dyn alloca considering GrowingUp stack (PR #119822)

[Matt Arsenault via llvm-commits]

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@@ -4002,8 +4002,9 @@ SDValue SITargetLowering::LowerCall(CallLoweringInfo &CLI,
                          InVals, /*IsThisReturn=*/false, SDValue());
 }
 
-// This is identical to the default implementation in ExpandDYNAMIC_STACKALLOC,
-// except for applying the wave size scale to the increment amount.
+// This is similar to the default implementation in ExpandDYNAMIC_STACKALLOC,
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arsenm wrote:

Mirror change in globalisel is needed 

https://github.com/llvm/llvm-project/pull/119822