OpenCL: Don't warn on v printf modifier

This avoids spurious warnings, but could use
a lot of work. For example the number of vector
elements is not verified, and the passed
value type is not checked.

Fixes bug 39486

llvm-svn: 346806

1 files changed, 34 insertions, 0 deletions

diff --git a/clang/test/SemaOpenCL/printf-format-strings.cl b/clang/test/SemaOpenCL/printf-format-strings.cl
new file mode 100644
index 00000000000..d5748e18ede
--- /dev/null
+++ b/clang/test/SemaOpenCL/printf-format-strings.cl
@@ -0,0 +1,34 @@
+// RUN: %clang_cc1 -cl-std=CL1.2 -fsyntax-only -verify %s
+
+typedef __attribute__((ext_vector_type(2))) float float2;
+typedef __attribute__((ext_vector_type(4))) float float4;
+typedef __attribute__((ext_vector_type(4))) int int4;
+
+int printf(__constant const char* st, ...) __attribute__((format(printf, 1, 2)));
+
+kernel void format_v4f32(float4 arg)
+{
+    printf("%v4f\n", arg); // expected-no-diagnostics
+}
+
+kernel void format_v4f32_wrong_num_elts(float2 arg)
+{
+    printf("%v4f\n", arg); // expected-no-diagnostics
+}
+
+kernel void vector_precision_modifier_v4f32(float4 arg)
+{
+    printf("%.2v4f\n", arg); // expected-no-diagnostics
+}
+
+// FIXME: This should warn
+kernel void format_missing_num_elts(float4 arg)
+{
+    printf("%vf\n", arg); // expected-no-diagnostics
+}
+
+// FIXME: This should warn
+kernel void vector_precision_modifier_v4i32(int4 arg)
+{
+    printf("%.2v4f\n", arg); // expected-no-diagnostics
+}