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Summary: The clang driver option -save-temps was not passed to the LTO config, so when invoking the ThinLTO backends via clang during distributed builds there was no way to get LTO to save temp files. Getting this to work with ThinLTO distributed builds also required changing the driver to avoid a separate compile step to emit unoptimized bitcode when the input was already bitcode under -save-temps. Not only is this unnecessary in general, it is problematic for ThinLTO backends since the temporary bitcode file to the backend would not match the module path in the combined index, leading to incorrect ThinLTO backend index-based optimizations. Reviewers: pcc Subscribers: mehdi_amini, inglorion, eraman, cfe-commits Differential Revision: https://reviews.llvm.org/D45217 llvm-svn: 330194
20 lines
1.3 KiB
C
20 lines
1.3 KiB
C
// RUN: %clang -O2 %s -flto=thin -c -o %t.o
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// RUN: llvm-lto -thinlto -o %t %t.o
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// -fthinlto_index should be passed to cc1
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// RUN: %clang -O2 -o %t1.o -x ir %t.o -c -fthinlto-index=%t.thinlto.bc -### 2>&1 | FileCheck %s -check-prefix=CHECK-THINLTOBE-ACTION
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// CHECK-THINLTOBE-ACTION: -fthinlto-index=
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// -save-temps should be passed to cc1
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// RUN: %clang -O2 -o %t1.o -x ir %t.o -c -fthinlto-index=%t.thinlto.bc -save-temps -### 2>&1 | FileCheck %s -check-prefix=CHECK-SAVE-TEMPS -check-prefix=CHECK-SAVE-TEMPS-CWD
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// RUN: %clang -O2 -o %t1.o -x ir %t.o -c -fthinlto-index=%t.thinlto.bc -save-temps=cwd -### 2>&1 | FileCheck %s -check-prefix=CHECK-SAVE-TEMPS -check-prefix=CHECK-SAVE-TEMPS-CWD
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// RUN: %clang -O2 -o %t1.o -x ir %t.o -c -fthinlto-index=%t.thinlto.bc -save-temps=obj -### 2>&1 | FileCheck %s -check-prefix=CHECK-SAVE-TEMPS -check-prefix=CHECK-SAVE-TEMPS-OBJ
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// CHECK-SAVE-TEMPS-NOT: -emit-llvm-bc
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// CHECK-SAVE-TEMPS-CWD: -save-temps=cwd
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// CHECK-SAVE-TEMPS-OBJ: -save-temps=obj
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// CHECK-SAVE-TEMPS-NOT: -emit-llvm-bc
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// Ensure clang driver gives the expected error for incorrect input type
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// RUN: not %clang -O2 -o %t1.o %s -c -fthinlto-index=%t.thinlto.bc 2>&1 | FileCheck %s -check-prefix=CHECK-WARNING
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// CHECK-WARNING: error: invalid argument '-fthinlto-index={{.*}}' only allowed with '-x ir'
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