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Diffstat (limited to 'meson/test cases/frameworks/15 llvm/sum.c')
-rw-r--r-- | meson/test cases/frameworks/15 llvm/sum.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/meson/test cases/frameworks/15 llvm/sum.c b/meson/test cases/frameworks/15 llvm/sum.c new file mode 100644 index 000000000..a93588e5e --- /dev/null +++ b/meson/test cases/frameworks/15 llvm/sum.c @@ -0,0 +1,76 @@ +/** This code is public domain, and taken from + * https://github.com/paulsmith/getting-started-llvm-c-api/blob/master/sum.c + */ +/** + * LLVM equivalent of: + * + * int sum(int a, int b) { + * return a + b; + * } + */ + +#include <llvm-c/Core.h> +#include <llvm-c/ExecutionEngine.h> +#include <llvm-c/Target.h> +#include <llvm-c/Analysis.h> +#include <llvm-c/BitWriter.h> + +#include <inttypes.h> +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char const *argv[]) { + LLVMModuleRef mod = LLVMModuleCreateWithName("my_module"); + + LLVMTypeRef param_types[] = { LLVMInt32Type(), LLVMInt32Type() }; + LLVMTypeRef ret_type = LLVMFunctionType(LLVMInt32Type(), param_types, 2, 0); + LLVMValueRef sum = LLVMAddFunction(mod, "sum", ret_type); + + LLVMBasicBlockRef entry = LLVMAppendBasicBlock(sum, "entry"); + + LLVMBuilderRef builder = LLVMCreateBuilder(); + LLVMPositionBuilderAtEnd(builder, entry); + LLVMValueRef tmp = LLVMBuildAdd(builder, LLVMGetParam(sum, 0), LLVMGetParam(sum, 1), "tmp"); + LLVMBuildRet(builder, tmp); + + char *error = NULL; + LLVMVerifyModule(mod, LLVMAbortProcessAction, &error); + LLVMDisposeMessage(error); + + LLVMExecutionEngineRef engine; + error = NULL; + LLVMLinkInMCJIT(); + LLVMInitializeNativeAsmPrinter(); + LLVMInitializeNativeTarget(); + if (LLVMCreateExecutionEngineForModule(&engine, mod, &error) != 0) { + fprintf(stderr, "failed to create execution engine\n"); + abort(); + } + if (error) { + fprintf(stderr, "error: %s\n", error); + LLVMDisposeMessage(error); + exit(EXIT_FAILURE); + } + + if (argc < 3) { + fprintf(stderr, "usage: %s x y\n", argv[0]); + exit(EXIT_FAILURE); + } + long long x = strtoll(argv[1], NULL, 10); + long long y = strtoll(argv[2], NULL, 10); + + LLVMGenericValueRef args[] = { + LLVMCreateGenericValueOfInt(LLVMInt32Type(), x, 0), + LLVMCreateGenericValueOfInt(LLVMInt32Type(), y, 0) + }; + LLVMGenericValueRef res = LLVMRunFunction(engine, sum, 2, args); + printf("%d\n", (int)LLVMGenericValueToInt(res, 0)); + + // Write out bitcode to file + if (LLVMWriteBitcodeToFile(mod, "sum.bc") != 0) { + fprintf(stderr, "error writing bitcode to file, skipping\n"); + } + + LLVMDisposeBuilder(builder); + LLVMDisposeExecutionEngine(engine); +} |