[llvm] [NFC][AMDGPU] Remove redundant code in `AMDGPUSubtarget::getWavesPerEU` (PR #155201)

[Shilei Tian via llvm-commits]

https://github.com/shiltian updated https://github.com/llvm/llvm-project/pull/155201

>From fa43df7e57c14ed46765556dcf8b68457df78a69 Mon Sep 17 00:00:00 2001
From: Shilei Tian <i at tianshilei.me>
Date: Mon, 25 Aug 2025 00:05:13 -0400
Subject: [PATCH] [NFC][AMDGPU] Remove redundant code in
 `AMDGPUSubtarget::getWavesPerEU`

---
 llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
index d095fc6cf9549..a1d82128423bb 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUSubtarget.cpp
@@ -209,19 +209,16 @@ std::pair<unsigned, unsigned>
 AMDGPUSubtarget::getWavesPerEU(const Function &F) const {
   // Default/requested minimum/maximum flat work group sizes.
   std::pair<unsigned, unsigned> FlatWorkGroupSizes = getFlatWorkGroupSizes(F);
-  // Minimum number of bytes allocated in the LDS.
-  unsigned LDSBytes = AMDGPU::getIntegerPairAttribute(F, "amdgpu-lds-size",
-                                                      {0, UINT32_MAX}, true)
-                          .first;
-  return getWavesPerEU(FlatWorkGroupSizes, LDSBytes, F);
+  return getWavesPerEU(F, FlatWorkGroupSizes);
 }
 
 std::pair<unsigned, unsigned> AMDGPUSubtarget::getWavesPerEU(
     const Function &F, std::pair<unsigned, unsigned> FlatWorkGroupSizes) const {
   // Minimum number of bytes allocated in the LDS.
-  unsigned LDSBytes = AMDGPU::getIntegerPairAttribute(F, "amdgpu-lds-size",
-                                                      {0, UINT32_MAX}, true)
-                          .first;
+  unsigned LDSBytes =
+      AMDGPU::getIntegerPairAttribute(F, "amdgpu-lds-size", {0, UINT32_MAX},
+                                      /*OnlyFirstRequired=*/true)
+          .first;
   return getWavesPerEU(FlatWorkGroupSizes, LDSBytes, F);
 }