f39c399d9d
The exit code for -### is inconsistent. Unrecognized options lead to exit code 1, as expected. However, most others errors (including invalid option value) lead to exit code 0, differing from GCC and most utilities. This is a longstanding quirk of -###, and we didn't fix it because many driver tests need adjustment. Change -### to be similar to -fdriver-only -v and exit with code 1. This requires fixing many driver tests, but the end result gives us stronger tests. * Existing `RUN: %clang -### ...` tests usually don't use `CHECK-NOT: error:` or `--implicit-check-not=error:`. If a change introduces an error, such a change usually cannot be detected. * Many folks contributing new tests don't know `-fdriver-only -v`. To test no driver error/warning for new tests, they can use the familiar `-### -Werror` instead of `-fdriver-only -v -Werror`. An incomplete list of prerequisite test improvement: * 2f79bb10461d114783a1548201928549ace09755: add -nogpulib to some AMDGPU tests * 9155e517e6e1cda474d0d0fa82f71696c325bc10: add --cuda-path= (test w/ and w/o /usr/local/cuda) * 80765ede5bbcca1364c2d4ae06127011eaba6389: -mcpu=native may return either 0 or 1, depending on whether `--target=` specifies a native target * abae53f43f0d1da8d8e421f4a628d7ec64d6e365: fix -fuse-ld=lld misuses (test w/o and w/o /usr/local/bin/ld.lld) * ab68df505e5bb8808ee44f53044b50ca7575098e: add -resource-dir= and -fvisibility=hidden to some -fsanitize=cfi tests * d5ca1602f64114f612ad5630f04e4aa90591c78d: --rtlib=platform without --unwindlib= may fail if CLANG_DEFAULT_UNWINDLIB=unwindlib Reviewed By: jhuber6, yaxunl, dblaikie Differential Revision: https://reviews.llvm.org/D156363
23 lines
1.3 KiB
C
23 lines
1.3 KiB
C
// Check that -mfloat-abi=hard gives a warning if FP registers aren't available.
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// RUN: %clang --target=arm-none-eabi -mcpu=cortex-m0 -mfloat-abi=hard -### -c %s 2>&1 \
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// RUN: | FileCheck %s
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// RUN: %clang --target=arm-none-eabi -mcpu=cortex-m0 -mhard-float -### -c %s 2>&1 \
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// RUN: | FileCheck -check-prefix=HARDFLOAT %s
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// -mfloat-abi=hard and -march=...+nofp are incompatible in this instance:
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// RUN: %clang --target=arm-none-eabi -march=armv8.1-m.main+nofp -mfloat-abi=hard -### -c %s 2>&1
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// -mfloat-abi=hard and -march=...+nofp are compatible in this instance:
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// RUN: %clang --target=arm-none-eabi -march=armv8.1-m.main+mve+nofp -mfloat-abi=hard -### -c %s 2>&1 \
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// RUN: | FileCheck -check-prefix=NOWARN %s
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// Here the float ABI is calculated as "hard" and FP registers are
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// calculated to not be available. Since the float ABI wasn't specified
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// explicitly, the warning should not be emitted.
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// RUN: not %clang --target=thumbv5-windows -mcpu=arm10tdmi -### -c %s -o /dev/null 2>&1 \
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// RUN: | FileCheck -check-prefix=NOWARN %s
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// CHECK: warning: '-mfloat-abi=hard': selected processor lacks floating point registers
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// HARDFLOAT: warning: '-mhard-float': selected processor lacks floating point registers
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// NOWARN-NOT: selected processor lacks floating point registers
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