[Clang][OpenCL][NVPTX] precommit test for using vprintf to implement builtin printf on OpenCL with NVPTX

Author: boxu-zhang

clang/test/CodeGenOpenCL/test-printf-nvptx.cl

@@ -0,0 +1,14 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 4
+// RUN: %clang_cc1 -cl-std=CL3.0 -triple nvptx-- -disable-llvm-passes -emit-llvm -o - %s | FileCheck -check-prefixes=NV %s
+
+int printf(__constant const char* st, ...) __attribute__((format(printf, 1, 2)));
+
+// NV-LABEL: define dso_local spir_kernel void @test_printf(
+// NV-SAME: ) #[[ATTR0:[0-9]+]] !kernel_arg_addr_space !4 !kernel_arg_access_qual !4 !kernel_arg_type !4 !kernel_arg_base_type !4 !kernel_arg_type_qual !4 {
+// NV-NEXT:  entry:
+// NV-NEXT:    [[CALL:%.*]] = call i32 (ptr addrspace(4), ...) @printf(ptr addrspace(4) noundef @.str) #[[ATTR2:[0-9]+]]
+// NV-NEXT:    ret void
+//
+__kernel void test_printf() {
+  printf("hello, printf on nvptx.");
+}