Reapply "Change -save-temps to emit unoptimized bitcode files."
This reapplies r224503 along with a fix for compiling Fortran by having the
clang driver invoke gcc (see r224546, where it was reverted). I have added
a testcase for that as well.
Original commit message:
It is often convenient to use -save-temps to collect the intermediate
results of a compilation, e.g., when triaging a bug report. Besides the
temporary files for preprocessed source and assembly code, this adds the
unoptimized bitcode files as well.
This adds a new BackendJobAction, which is mostly mechanical, to run after
the CompileJobAction. When not using -save-temps, the BackendJobAction is
combined into one job with the CompileJobAction, similar to the way the
integrated assembler is handled. I've implemented this entirely as a
driver change, so under the hood, it is just using -disable-llvm-optzns
to get the unoptimized bitcode.
Based in part on a patch by Steven Wu.
rdar://problem/18909437
llvm-svn: 224688
2014-12-21 15:00:00 +08:00
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// Check that the clang driver can invoke gcc to compile Fortran.
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// RUN: %clang -target x86_64-unknown-linux-gnu -integrated-as -c %s -### 2>&1 \
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2016-01-06 15:24:45 +08:00
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// RUN: | FileCheck --check-prefix=CHECK-OBJECT %s
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// CHECK-OBJECT: gcc
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// CHECK-OBJECT: "-c"
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// CHECK-OBJECT: "-x" "f95"
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// CHECK-OBJECT-NOT: cc1as
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// RUN: %clang -target x86_64-unknown-linux-gnu -integrated-as -S %s -### 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-ASM %s
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// CHECK-ASM: gcc
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// CHECK-ASM: "-S"
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// CHECK-ASM: "-x" "f95"
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// CHECK-ASM-NOT: cc1
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2016-01-07 17:03:42 +08:00
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// RUN: %clang -Wall -target x86_64-unknown-linux-gnu -integrated-as %s -o %t -### 2>&1 | FileCheck --check-prefix=CHECK-WARN %s
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// CHECK-WARN: gcc
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// CHECK-WARN-NOT: "-Wall"
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// CHECK-WARN: ld
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// CHECK-WARN-NOT: "-Wall"
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