[PATCH] D62729: [ARM] Fix recent breakage of -mfpu=none.
Simon Tatham via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Fri May 31 04:16:58 PDT 2019
simon_tatham marked an inline comment as done.
simon_tatham added inline comments.
Comment at: clang/test/CodeGen/arm-mfpu-none.c:2
+// REQUIRES: arm-registered-target
+// RUN: %clang -target arm-none-eabi -mcpu=cortex-m4 -mfpu=none -S -o - %s | FileCheck %s
> lebedev.ri wrote:
> > Generally clang codegen tests should test `-emit-llvm -S` output
> Perhaps add to the tests in clang/test/Driver/arm-mfpu.c instead?
@lebedev.ri : looking at the IR doesn't show up what I'm trying to test in this case. And I modelled this on existing tests in test/CodeGen, such as `arm-eabi.c`, which also need to test the real assembler output in order to do their job.
@dmgreen: it's true that I could also make `test/Driver/arm-mfpu.c` check that the extra feature name is appearing in the cc1 command line where I currently think it should be, but I think that wouldn't replace this test. The real point of this test is that the //currently// right feature names might not stay right, if the feature set is reorganised again in future – and if that happens, then whoever does it will probably rewrite most of `arm-mfpu.c` anyway.
So this is an end-to-end check that //whatever// detailed command line is generated by the driver in these circumstances, it is sufficient to ensure that the final generated code really doesn't include FP instructions.
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