24e52992c0
- We actually pretend that we have two separate types for LLVM assembly/bitcode because we need to use the standard suffixes with LTO ('clang -O4 -c t.c' should generate 't.o').
It is now possible to do something like:
$ clang -emit-llvm -S t.c -o t.ll ... assorted other compile flags ...
$ clang -c t.ll -o t.o ... assorted other compile flags ...
and expect that the output will be almost* identical to:
$ clang -c t.c -o t.o ... assorted other compile flags ...
because all the target settings (default CPU, target features, etc.) will all be initialized properly by the driver/frontend.
*: This isn't perfect yet, because in practice we will end up running the optimization passes twice. It's possible to get something equivalent out with a well placed -mllvm -disable-llvm-optzns, but I'm still thinking about the cleanest way to solve this problem more generally.
llvm-svn: 105584
24 lines
984 B
C
24 lines
984 B
C
// -emit-llvm, -flto, and -O4 all cause a switch to llvm-bc object files.
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// RUN: %clang -ccc-print-phases -c %s -flto 2> %t.log
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// RUN: grep '2: compiler, {1}, lto-bc' %t.log
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// RUN: %clang -ccc-print-phases -c %s -O4 2> %t.log
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// RUN: grep '2: compiler, {1}, lto-bc' %t.log
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// and -emit-llvm doesn't alter pipeline (unfortunately?).
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// RUN: %clang -ccc-print-phases %s -emit-llvm 2> %t.log
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// RUN: grep '0: input, ".*lto.c", c' %t.log
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// RUN: grep '1: preprocessor, {0}, cpp-output' %t.log
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// RUN: grep '2: compiler, {1}, lto-bc' %t.log
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// RUN: grep '3: linker, {2}, image' %t.log
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// llvm-bc and llvm-ll outputs need to match regular suffixes
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// (unfortunately).
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// RUN: %clang %s -emit-llvm -save-temps -### 2> %t.log
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// RUN: grep '"-o" ".*lto\.i" "-x" "c" ".*lto\.c"' %t.log
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// RUN: grep '"-o" ".*lto\.o" .*".*lto\.i"' %t.log
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// RUN: grep '".*a.out" .*".*lto\.o"' %t.log
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// RUN: %clang %s -emit-llvm -S -### 2> %t.log
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// RUN: grep '"-o" ".*lto\.s" "-x" "c" ".*lto\.c"' %t.log
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