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Auto merge of #130446 - durin42:llvm-20-fix-CommandLineArgs, r=workingjubilee

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rustc_llvm: adapt to flattened CLI args in LLVM

This changed in
llvm/llvm-project@e190d074a0. I decided to stick with more duplication between the ifdef blocks to make the code easier to read for the next two years before we can plausibly drop LLVM 19.

`@rustbot` label: +llvm-main

try-job: x86_64-msvc
This commit is contained in:
bors 2024-09-22 05:26:41 +00:00
commit 1f9a018fa3
1 changed files with 19 additions and 1 deletions
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20
compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
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@ -485,6 +485,22 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
Options.EmitStackSizeSection = EmitStackSizeSection;
if (ArgsCstrBuff != nullptr) {
#if LLVM_VERSION_GE(20, 0)
int buffer_offset = 0;
assert(ArgsCstrBuff[ArgsCstrBuffLen - 1] == '\0');
auto Arg0 = std::string(ArgsCstrBuff);
buffer_offset = Arg0.size() + 1;
auto ArgsCppStr =
std::string(ArgsCstrBuff + buffer_offset, ArgsCstrBuffLen - 1);
auto i = 0;
while (i != std::string::npos) {
i = ArgsCppStr.find('\0', i + 1);
if (i != std::string::npos)
ArgsCppStr.replace(i, i + 1, " ");
}
Options.MCOptions.Argv0 = Arg0;
Options.MCOptions.CommandlineArgs = ArgsCppStr;
#else
int buffer_offset = 0;
assert(ArgsCstrBuff[ArgsCstrBuffLen - 1] == '\0');
@ -510,6 +526,7 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
Options.MCOptions.Argv0 = arg0;
Options.MCOptions.CommandLineArgs =
llvm::ArrayRef<std::string>(cmd_arg_strings, num_cmd_arg_strings);
#endif
}
TargetMachine *TM = TheTarget->createTargetMachine(
@ -518,10 +535,11 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
}
extern "C" void LLVMRustDisposeTargetMachine(LLVMTargetMachineRef TM) {
#if LLVM_VERSION_LT(20, 0)
MCTargetOptions &MCOptions = unwrap(TM)->Options.MCOptions;
delete[] MCOptions.Argv0;
delete[] MCOptions.CommandLineArgs.data();
#endif
delete unwrap(TM);
}