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[clang][driver] Enable '-flto' on AVR

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Reviewed By: MaskRay

Closes https://github.com/llvm/llvm-project/issues/55940

Differential Revision: https://reviews.llvm.org/D145646
This commit is contained in:
Ben Shi 2023-03-09 12:04:54 +08:00
parent fa0d4e1f12
commit 0d37efdbc5
3 changed files with 22 additions and 0 deletions
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6
clang/lib/Driver/ToolChains/AVR.cpp
View File

@ -506,6 +506,12 @@ void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA,
D.Diag(diag::warn_drv_avr_linker_section_addresses_not_implemented) << CPU;
}
if (D.isUsingLTO()) {
assert(!Inputs.empty() && "Must have at least one input.");
addLTOOptions(getToolChain(), Args, CmdArgs, Output, Inputs[0],
D.getLTOMode() == LTOK_Thin);
}
// If the family name is known, we can link with the device-specific libgcc.
// Without it, libgcc will simply not be linked. This matches avr-gcc
// behavior.

2
clang/lib/Driver/ToolChains/AVR.h
View File

@ -36,6 +36,8 @@ public:
std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component,
FileType Type) const override;
bool HasNativeLLVMSupport() const override { return true; }
protected:
Tool *buildLinker() const override;

14
clang/test/Driver/avr-ld.c
View File

@ -43,3 +43,17 @@
// RUN: %clang -### --target=avr -mmcu=atxmega128a1 --rtlib=libgcc --sysroot %S/Inputs/basic_avr_tree %s 2>&1 | FileCheck -check-prefix LINKO %s
// LINKO: {{".*ld.*"}} {{.*}} {{"-L.*avrxmega7"}} {{.*}} "--defsym=__DATA_REGION_ORIGIN__=0x802000" "--start-group" {{.*}} "-latxmega128a1" {{.*}} "--end-group" "--relax" "-mavrxmega7"
// RUN: %clang -### --target=avr -mmcu=atmega328 -flto --sysroot %S/Inputs/basic_avr_tree %s 2>&1 | FileCheck -check-prefix LINKP %s
// LINKP: {{".*ld.*"}} {{.*}} "--defsym=__DATA_REGION_ORIGIN__=0x800100" "-plugin" {{.*}} "-plugin-opt=mcpu=atmega328"
// RUN: %clang -### --target=avr -flto --sysroot %S/Inputs/basic_avr_tree %s 2>&1 | FileCheck -check-prefix LINKQ %s
// LINKQ: {{".*ld.*"}} {{.*}} "-plugin"
// LINKQ-NOT: "-plugin-opt=mcpu"
// RUN: %clang -### --target=avr -mmcu=atmega328 -flto=thin --sysroot %S/Inputs/basic_avr_tree %s 2>&1 | FileCheck -check-prefix LINKR %s
// LINKR: {{".*ld.*"}} {{.*}} "--defsym=__DATA_REGION_ORIGIN__=0x800100" "-plugin" {{.*}} "-plugin-opt=mcpu=atmega328" "-plugin-opt=thinlto"
// RUN: %clang -### --target=avr -mmcu=atmega328 -flto --sysroot %S/Inputs/basic_avr_tree %s 2>&1 | FileCheck -check-prefix LINKS %s
// LINKS: {{".*ld.*"}} {{.*}} "--defsym=__DATA_REGION_ORIGIN__=0x800100" "-plugin" {{.*}} "-plugin-opt=mcpu=atmega328"
// LINKS-NOT: "-plugin-opt=thinlto"