Index: clang/lib/Driver/Driver.cpp =================================================================== --- clang/lib/Driver/Driver.cpp +++ clang/lib/Driver/Driver.cpp @@ -4604,6 +4604,17 @@ return Args.MakeArgString(Filename.c_str()); } +static bool HasPreprocessOutput(const Action &JA) { + if (isa(JA)) + return true; + if (isa(JA) && isa(JA.getInputs()[0])) + return true; + if (isa(JA) && + HasPreprocessOutput(*(JA.getInputs()[0]))) + return true; + return false; +} + const char *Driver::GetNamedOutputPath(Compilation &C, const JobAction &JA, const char *BaseInput, StringRef BoundArch, bool AtTopLevel, @@ -4629,8 +4640,9 @@ } // Default to writing to stdout? - if (AtTopLevel && !CCGenDiagnostics && isa(JA)) + if (AtTopLevel && !CCGenDiagnostics && HasPreprocessOutput(JA)) { return "-"; + } // Is this the assembly listing for /FA? if (JA.getType() == types::TY_PP_Asm && Index: clang/test/Driver/hip-output-file-name.hip =================================================================== --- clang/test/Driver/hip-output-file-name.hip +++ clang/test/Driver/hip-output-file-name.hip @@ -7,3 +7,27 @@ // RUN: 2>&1 | FileCheck %s // CHECK: {{.*}}clang-offload-bundler{{.*}}"-outputs=hip-output-file-name.o" + +// Check -E default output is "-" (stdout). + +// RUN: %clang -### -E -target x86_64-linux-gnu \ +// RUN: --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %s \ +// RUN: 2>&1 | FileCheck -check-prefixes=DASH %s + +// RUN: %clang -### -E -save-temps -target x86_64-linux-gnu \ +// RUN: --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %s \ +// RUN: 2>&1 | FileCheck -check-prefixes=DASH %s + +// DASH: {{.*}}clang-offload-bundler{{.*}}"-outputs=-" + +// Check -E with -o. + +// RUN: %clang -### -E -o test.cui -target x86_64-linux-gnu \ +// RUN: --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %s \ +// RUN: 2>&1 | FileCheck -check-prefixes=OUT %s + +// RUN: %clang -### -E -o test.cui -save-temps -target x86_64-linux-gnu \ +// RUN: --cuda-gpu-arch=gfx803 --cuda-gpu-arch=gfx900 %s \ +// RUN: 2>&1 | FileCheck -check-prefixes=OUT %s + +// OUT: {{.*}}clang-offload-bundler{{.*}}"-outputs=test.cui"