[llvm] [Attributor] Change allocation size and load/store offsets using AAPointerInfo for Alloca instructions (PR #72029)

[Vidush Singhal via llvm-commits]

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@@ -10,15 +10,14 @@ define hidden i64 @f1() align 2 {
 ; TUNIT-LABEL: define {{[^@]+}}@f1
 ; TUNIT-SAME: () #[[ATTR0:[0-9]+]] align 2 {
 ; TUNIT-NEXT:  entry:
-; TUNIT-NEXT:    [[REF_TMP1:%.*]] = alloca i8, i32 0, align 8
+; TUNIT-NEXT:    [[REF_TMP1:%.*]] = alloca [0 x i8], align 1
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vidsinghal wrote:

I would think AAIsDead should be able to remove it, However it seems like it is not implemented atm. 
I think this should be taken care of when the implementation of AAIsDead is extended to keep track of each instruction. 

https://github.com/llvm/llvm-project/pull/72029