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https://github.com/c64scene-ar/llvm-6502.git
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97d9903236
Consider the following program: $ cat main.c void foo(void) { } int main(int argc, char *argv[]) { foo(); return 0; } $ cat bundle.c extern void foo(void); void bar(void) { foo(); } $ clang -o main main.c $ clang -o bundle.so bundle.c -bundle -bundle_loader ./main $ nm -m bundle.so 0000000000000f40 (__TEXT,__text) external _bar (undefined) external _foo (from executable) (undefined) external dyld_stub_binder (from libSystem) $ clang -o main main.c -O4 $ clang -o bundle.so bundle.c -bundle -bundle_loader ./main Undefined symbols for architecture x86_64: "_foo", referenced from: _bar in bundle-elQN6d.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) The linker was told that the 'foo' in 'main' was 'internal' and had no uses, so it was dead stripped. Another situation is something like: define void @foo() { ret void } define void @bar() { call asm volatile "call _foo" ... ret void } The only use of 'foo' is inside of an inline ASM call. Since we don't look inside those for uses of functions, we don't specify this as a "use." Get around this by not invoking the 'internalize' pass by default. This is an admitted hack for LTO correctness. <rdar://problem/11185386> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154124 91177308-0d34-0410-b5e6-96231b3b80d8 |
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bugpoint | ||
bugpoint-passes | ||
gold | ||
llc | ||
lli | ||
llvm-ar | ||
llvm-as | ||
llvm-bcanalyzer | ||
llvm-config | ||
llvm-cov | ||
llvm-diff | ||
llvm-dis | ||
llvm-dwarfdump | ||
llvm-extract | ||
llvm-ld | ||
llvm-link | ||
llvm-mc | ||
llvm-nm | ||
llvm-objdump | ||
llvm-prof | ||
llvm-ranlib | ||
llvm-readobj | ||
llvm-rtdyld | ||
llvm-shlib | ||
llvm-size | ||
llvm-stress | ||
llvm-stub | ||
lto | ||
macho-dump | ||
opt | ||
CMakeLists.txt | ||
LLVMBuild.txt | ||
Makefile |