ac/nir: move ac_build_alloca() to ac_llvm_build.c

As well as si_build_alloca_undef() and drop the si prefix.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/common/ac_llvm_build.h

@@ -390,6 +390,11 @@ void ac_build_if(struct ac_llvm_context *ctx, LLVMValueRef value,
 void ac_build_uif(struct ac_llvm_context *ctx, LLVMValueRef value,
 		  int lable_id);
 
+LLVMValueRef ac_build_alloca(struct ac_llvm_context *ac, LLVMTypeRef type,
+			     const char *name);
+LLVMValueRef ac_build_alloca_undef(struct ac_llvm_context *ac, LLVMTypeRef type,
+				   const char *name);
+
 #ifdef __cplusplus
 }
 #endif