ac/llvm: make AC_ARG_FLOAT equal to AC_ARG_INT

Nothing cares about the type anymore.

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36696>

src/amd/common/ac_shader_args.h

@@ -24,8 +24,8 @@ enum ac_arg_regfile
 enum ac_arg_type
 {
    AC_ARG_INVALID = -1,
-   AC_ARG_FLOAT,
    AC_ARG_INT,
+   AC_ARG_FLOAT = AC_ARG_INT,
    AC_ARG_CONST_ADDR,
 };
 

src/amd/llvm/ac_llvm_build.c

@@ -3568,8 +3568,6 @@ void ac_export_mrt_z(struct ac_llvm_context *ctx, LLVMValueRef depth, LLVMValueR
 static LLVMTypeRef arg_llvm_type(enum ac_arg_type type, unsigned size, struct ac_llvm_context *ctx)
 {
    switch (type) {
-      case AC_ARG_FLOAT:
-         return size == 1 ? ctx->f32 : LLVMVectorType(ctx->f32, size);
       case AC_ARG_INT:
          return size == 1 ? ctx->i32 : LLVMVectorType(ctx->i32, size);
       case AC_ARG_CONST_ADDR: