ac: fix buffer overflow bug in 64bit SSBO loads

Fixes: 441ee1e65b04 "radv/ac: Implement Float64 SSBO loads"
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 1dc64f87cc9be064299dc9b675af524171376968..e07330ca5c840d028bd20e57e5f2072a11dc9d3a 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -2588,8 +2588,11 @@ static LLVMValueRef visit_load_buffer(struct ac_nir_context *ctx,
                        ctx->ac.i1false,
                };
 
-               results[i] = ac_build_intrinsic(&ctx->ac, load_name, data_type, params, 5, 0);
+               int idx = i;
+               if (instr->dest.ssa.bit_size == 64)
+                       idx = i > 1 ? 1 : 0;
 
+               results[idx] = ac_build_intrinsic(&ctx->ac, load_name, data_type, params, 5, 0);
        }
 
        assume(results[0]);