[llvm] [NVPTX][NFC] Update NVPTXLowerAlloca comments to use opaque pointer syntax (PR #190573)

[Balaji Krishna Yugandhar Atukuri via llvm-commits]

https://github.com/balaji-krishna-atukuri created https://github.com/llvm/llvm-project/pull/190573

Modernize the header comment IR examples in `NVPTXLowerAlloca.cpp` to use opaque pointer syntax (`ptr` instead of `i32*`, `i32 addrspace(5)*`, etc.), matching the LLVM-wide move to opaque pointers in LLVM 17+.

Also fix a grammar issue: "For all alloca instructions, **and** add a pair of cast" → "For all alloca instructions, add a pair of **casts**".

Comment-only change, no functional impact.

>From 9e51aff00d41f87a2f8a5f870e679a7872b133b7 Mon Sep 17 00:00:00 2001
From: Balaji Krishna Yugandhar Atukuri <balaji.k.atukuri at gmail.com>
Date: Sun, 5 Apr 2026 19:21:39 -0700
Subject: [PATCH] [NVPTX][NFC] Update NVPTXLowerAlloca comments to use opaque
 pointer syntax

Modernize the header comment IR examples to use opaque pointer syntax
(ptr instead of i32*, i32 addrspace(5)*, etc.), matching the LLVM-wide
move to opaque pointers in LLVM 17+. Also fix a grammar issue in the
comment.
---
 llvm/lib/Target/NVPTX/NVPTXLowerAlloca.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/llvm/lib/Target/NVPTX/NVPTXLowerAlloca.cpp b/llvm/lib/Target/NVPTX/NVPTXLowerAlloca.cpp
index 1583d45eeb3a6..2262decfc3c76 100644
--- a/llvm/lib/Target/NVPTX/NVPTXLowerAlloca.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXLowerAlloca.cpp
@@ -6,18 +6,18 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// For all alloca instructions, and add a pair of cast to local address for
+// For all alloca instructions, add a pair of casts to local address for
 // each of them. For example,
 //
 //   %A = alloca i32
-//   store i32 0, i32* %A ; emits st.u32
+//   store i32 0, ptr %A ; emits st.u32
 //
 // will be transformed to
 //
 //   %A = alloca i32
-//   %Local = addrspacecast i32* %A to i32 addrspace(5)*
-//   %Generic = addrspacecast i32 addrspace(5)* %A to i32*
-//   store i32 0, i32 addrspace(5)* %Generic ; emits st.local.u32
+//   %Local = addrspacecast ptr %A to ptr addrspace(5)
+//   %Generic = addrspacecast ptr addrspace(5) %Local to ptr
+//   store i32 0, ptr %Generic ; emits st.local.u32
 //
 // And we will rely on NVPTXInferAddressSpaces to combine the last two
 // instructions.