[llvm] [AMDGPU] Fix an invalid cast in `AMDGPULateCodeGenPrepare::visitLoadInst` (PR #122494)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,37 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a %s -o - | FileCheck %s
+
+define amdgpu_kernel void @load_idx_idy(ptr addrspace(4) %disp, ptr %g) {
+; CHECK-LABEL: load_idx_idy:
+; CHECK:       ; %bb.0: ; %entry
+; CHECK-NEXT:    s_load_dword s6, s[4:5], 0x4
+; CHECK-NEXT:    s_load_dwordx4 s[0:3], s[8:9], 0x0
+; CHECK-NEXT:    v_mov_b32_e32 v0, 0
+; CHECK-NEXT:    s_waitcnt lgkmcnt(0)
+; CHECK-NEXT:    s_lshr_b32 s4, s6, 16
+; CHECK-NEXT:    s_bfe_i64 s[4:5], s[4:5], 0x10000
+; CHECK-NEXT:    s_lshl_b64 s[4:5], s[4:5], 6
+; CHECK-NEXT:    s_add_u32 s0, s0, s4
+; CHECK-NEXT:    s_addc_u32 s1, s1, s5
+; CHECK-NEXT:    global_load_ubyte v2, v0, s[0:1] offset:4
+; CHECK-NEXT:    v_mov_b32_e32 v0, s2
+; CHECK-NEXT:    v_mov_b32_e32 v1, s3
+; CHECK-NEXT:    s_waitcnt vmcnt(0)
+; CHECK-NEXT:    flat_store_byte v[0:1], v2
+; CHECK-NEXT:    s_endpgm
+entry:
+  %disp1 = tail call ptr addrspace(4) @llvm.amdgcn.dispatch.ptr()
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arsenm wrote:

You probably missed adding the dereferenceable and align attributes to the pointer, which are implied by the intrinsic declaration 

https://github.com/llvm/llvm-project/pull/122494