add -S test and comment

Signed-off-by: Nick Sarnie <[email protected]>

Author: sarnex

clang/include/clang/Driver/CommonArgs.h

@@ -312,6 +312,9 @@ void setComplexRange(const Driver &D, StringRef NewOpt,
                      LangOptions::ComplexRangeKind NewRange, StringRef &LastOpt,
                      LangOptions::ComplexRangeKind &Range);
 
+// This function expects that the inputs to llvm-link will be specified by the
+// caller, but the output is handled by this function, with the optional ability
+// to set the output filename.
 void constructLlvmLinkCommand(Compilation &C, const Tool &T,
                               const JobAction &JA,
                               const InputInfoList &JobInputs,

clang/test/Driver/spirv-llvm-link-emit-asm.c

@@ -0,0 +1,31 @@
+// Check BC input with -S
+// RUN: mkdir -p %t
+// RUN: touch %t/a.bc
+// RUN: touch %t/b.bc
+// RUN: %clang -### --target=spirv64 -emit-llvm -S %t/a.bc %t/b.bc 2>&1 | FileCheck --check-prefix=CHECK-TOOL-BC %s
+
+// CHECK-TOOL-BC: "-cc1" {{.*}} "-o" "{{.*}}.ll" "-x" "ir" "{{.*}}.bc"
+// CHECK-TOOL-BC: "-cc1" {{.*}} "-o" "{{.*}}.ll" "-x" "ir" "{{.*}}.bc"
+// CHECK-TOOL-BC-NOT: llvm-link
+
+// RUN: %clang -ccc-print-bindings --target=spirv64 -emit-llvm -S %t/a.bc %t/b.bc 2>&1 | FileCheck -check-prefix=CHECK-BINDINGS-BC %s
+
+// CHECK-BINDINGS-BC: "spirv64" - "clang", inputs: ["{{.*}}.bc"], output: "[[TMP1_BINDINGS_BC:.+]]"
+// CHECK-BINDINGS-BC: "spirv64" - "clang", inputs: ["{{.*}}.bc"], output: "[[TMP2_BINDINGS_BC:.+]]"
+// CHECK-BINDINGS-BC-NOT: SPIR-V::Linker
+
+// Check source input with -S
+// RUN: touch %t/foo.c
+// RUN: touch %t/bar.c
+
+// RUN: %clang -### --target=spirv64 -emit-llvm -S %t/foo.c %t/bar.c 2>&1 | FileCheck --check-prefix=CHECK-TOOL-SRC %s
+
+// CHECK-TOOL-SRC: "-cc1" {{.*}} "-o" "{{.*}}.ll" "-x" "c" "{{.*}}foo.c"
+// CHECK-TOOL-SRC: "-cc1" {{.*}} "-o" "{{.*}}.ll" "-x" "c" "{{.*}}bar.c"
+// CHECK-TOOL-SRC-NOT: llvm-link
+
+// RUN: %clang -ccc-print-bindings --target=spirv64 -emit-llvm -S %t/foo.c %t/bar.c 2>&1 | FileCheck -check-prefix=CHECK-BINDINGS-SRC %s
+
+// CHECK-BINDINGS-SRC: "spirv64" - "clang", inputs: ["{{.*}}foo.c"], output: "{{.*}}.ll"
+// CHECK-BINDINGS-SRC: "spirv64" - "clang", inputs: ["{{.*}}bar.c"], output: "{{.*}}.ll"
+// CHECK-BINDINGS-SRC-NOT: SPIR-V::Linker