[clang] [llvm] [AArch64][SelectionDAG] Add CodeGen support for scalar FEAT_CPA (PR #105669)

[Rodolfo Wottrich via cfe-commits]

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@@ -0,0 +1,451 @@
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs --mattr=+cpa -O0 -global-isel=0 -fast-isel=0 %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK-CPA-O0
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs --mattr=+cpa -O3 -global-isel=0 -fast-isel=0 %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK-CPA-O3
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs --mattr=-cpa -O0 -global-isel=0 -fast-isel=0 %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK-NOCPA-O0
+; RUN: llc -mtriple=aarch64 -verify-machineinstrs --mattr=-cpa -O3 -global-isel=0 -fast-isel=0 %s -o - 2>&1 | FileCheck %s --check-prefixes=CHECK-NOCPA-O3
+
+%struct.my_type = type { i64, i64 }
+%struct.my_type2 = type { i64, i64, i64, i64, i64, i64 }
+
+ at array = external dso_local global [10 x %struct.my_type], align 8
+ at array2 = external dso_local global [10 x %struct.my_type2], align 8
+
+define void @addpt1(i64 %index, i64 %arg) {
+; CHECK-CPA-O0-LABEL:    addpt1:
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rgwott wrote:

I am not sure why, could you explain your rationale?

https://github.com/llvm/llvm-project/pull/105669