1a3bf2953a
Constructor homing reduces the amount of class type info that is emitted by emitting conmplete type info for a class only when a constructor for that class is emitted. This will mainly reduce the amount of duplicate debug info in object files. In Chrome enabling ctor homing decreased total build directory sizes by about 30%. It's also expected that some class types (such as unused classes) will no longer be emitted in the debug info. This is fine, since we wouldn't expect to need these types when debugging. In some cases (e.g. libc++, https://reviews.llvm.org/D98750), classes are used without calling the constructor. Since this is technically undefined behavior, enabling constructor homing should be fine. However Clang now has an attribute `__attribute__((standalone_debug))` that can be used on classes to ignore ctor homing. Bug: https://bugs.llvm.org/show_bug.cgi?id=46537 Differential Revision: https://reviews.llvm.org/D106084
78 lines
3.4 KiB
C
78 lines
3.4 KiB
C
// Check to make sure clang is somewhat picky about -g options.
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// (Delived from debug-options.c)
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// rdar://10383444
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// RUN: %clang -### -c -save-temps -integrated-as -g %s 2>&1 \
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// RUN: | FileCheck -check-prefix=SAVE %s
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//
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// SAVE: "-cc1"{{.*}}"-E"{{.*}}"-debug-info-kind=
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// SAVE: "-cc1"{{.*}}"-emit-llvm-bc"{{.*}}"-debug-info-kind=
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// SAVE: "-cc1"{{.*}}"-S"{{.*}}"-debug-info-kind=
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// SAVE: "-cc1as"
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// SAVE-NOT: -debug-info-kind=
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// Make sure that '-ggdb0' is not accidentally mistaken for '-g'
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// RUN: %clang -### -ggdb0 -c -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GGDB0 %s
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//
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// GGDB0: "-cc1as"
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// GGDB0-NOT: -debug-info-kind=
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// Check to make sure clang with -g on a .s file gets passed.
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// rdar://9275556
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// RUN: %clang -### -c -integrated-as -g -x assembler %s 2>&1 \
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// RUN: | FileCheck %s
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//
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// CHECK: "-cc1as"
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// CHECK: "-debug-info-kind=constructor"
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// Check to make sure clang with -g on a .s file gets passed -dwarf-debug-producer.
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// rdar://12955296
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// RUN: %clang -### -c -integrated-as -g -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=P %s
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//
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// P: "-cc1as"
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// P: "-dwarf-debug-producer"
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// Check that -gdwarf64 is passed to cc1as.
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// RUN: %clang -### -c -gdwarf64 -gdwarf-5 -target x86_64 -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_ON %s
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// RUN: %clang -### -c -gdwarf64 -gdwarf-4 -target x86_64 -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_ON %s
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// RUN: %clang -### -c -gdwarf64 -gdwarf-3 -target x86_64 -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_ON %s
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// GDWARF64_ON: "-cc1as"
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// GDWARF64_ON: "-gdwarf64"
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// Check that -gdwarf64 can be reverted with -gdwarf32.
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// RUN: %clang -### -c -gdwarf64 -gdwarf32 -gdwarf-4 -target x86_64 -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_OFF %s
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// GDWARF64_OFF: "-cc1as"
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// GDWARF64_OFF-NOT: "-gdwarf64"
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// Check that an error is reported if -gdwarf64 cannot be used.
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// RUN: %clang -### -c -gdwarf64 -gdwarf-2 -target x86_64 -integrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_VER %s
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// RUN: %clang -### -c -gdwarf64 -gdwarf-4 -target i386-linux-gnu %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_32ARCH %s
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// RUN: %clang -### -c -gdwarf64 -gdwarf-4 -target x86_64-apple-darwin %s 2>&1 \
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// RUN: | FileCheck -check-prefix=GDWARF64_ELF %s
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//
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// GDWARF64_VER: error: invalid argument '-gdwarf64' only allowed with 'DWARFv3 or greater'
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// GDWARF64_32ARCH: error: invalid argument '-gdwarf64' only allowed with '64 bit architecture'
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// GDWARF64_ELF: error: invalid argument '-gdwarf64' only allowed with 'ELF platforms'
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// Check that -gdwarf-N can be placed before other options of the "-g" group.
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// RUN: %clang -### -c -g -gdwarf-3 -target %itanium_abi_triple -fintegrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=DWARF3 %s
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// RUN: %clang -### -c -gdwarf-3 -g -target %itanium_abi_triple -fintegrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=DWARF3 %s
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// RUN: %clang -### -c -g -gdwarf-5 -target %itanium_abi_triple -fintegrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=DWARF5 %s
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// RUN: %clang -### -c -gdwarf-5 -g -target %itanium_abi_triple -fintegrated-as -x assembler %s 2>&1 \
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// RUN: | FileCheck -check-prefix=DWARF5 %s
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// DWARF3: "-cc1as"
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// DWARF3: "-dwarf-version=3"
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// DWARF5: "-cc1as"
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// DWARF5: "-dwarf-version=5"
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