From 4d0589d9f9b02b87703dfcf309e8e3382a256ab0 Mon Sep 17 00:00:00 2001
From: Andrea Shepard <andrea@persephoneslair.org>
Date: Thu, 24 Nov 2016 04:15:41 +0000
Subject: [PATCH] Implement LLVM backend for h_nothing_p()
---
src/parsers/nothing.c | 27 +++++++++++++++++++++++++++
src/t_parser.c | 1 +
2 files changed, 28 insertions(+)
diff --git a/src/parsers/nothing.c b/src/parsers/nothing.c
index 0a60108b..d95f3f24 100644
--- a/src/parsers/nothing.c
+++ b/src/parsers/nothing.c
@@ -1,3 +1,10 @@
+#ifdef HAMMER_LLVM_BACKEND
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+#include <llvm-c/Core.h>
+#pragma GCC diagnostic pop
+#include "../backends/llvm/llvm.h"
+#endif
#include "parser_internal.h"
static HParseResult* parse_nothing() {
@@ -16,12 +23,32 @@ static bool nothing_ctrvm(HRVMProg *prog, void* env) {
return true;
}
+#ifdef HAMMER_LLVM_BACKEND
+
+static bool nothing_llvm(HLLVMParserCompileContext *ctxt, void* env) {
+ if (!ctxt) return false;
+
+ /* This one just always returns NULL */
+ LLVMBasicBlockRef entry = LLVMAppendBasicBlock(ctxt->func, "nothing_entry");
+ LLVMBuildBr(ctxt->builder, entry);
+ LLVMPositionBuilderAtEnd(ctxt->builder, entry);
+
+ LLVMBuildRet(ctxt->builder, LLVMConstNull(ctxt->llvm_parseresultptr));
+
+ return true;
+}
+
+#endif /* defined(HAMMER_LLVM_BACKEND) */
+
static const HParserVtable nothing_vt = {
.parse = parse_nothing,
.isValidRegular = h_true,
.isValidCF = h_true,
.desugar = desugar_nothing,
.compile_to_rvm = nothing_ctrvm,
+#ifdef HAMMER_LLVM_BACKEND
+ .llvm = nothing_llvm,
+#endif
.higher = false,
};
diff --git a/src/t_parser.c b/src/t_parser.c
index b7e2393b..30e9fc77 100644
--- a/src/t_parser.c
+++ b/src/t_parser.c
@@ -1049,5 +1049,6 @@ void register_parser_tests(void) {
g_test_add_data_func("/core/parser/llvm/uint8", GINT_TO_POINTER(PB_LLVM), test_uint8);
g_test_add_data_func("/core/parser/llvm/in", GINT_TO_POINTER(PB_LLVM), test_in);
g_test_add_data_func("/core/parser/llvm/not_in", GINT_TO_POINTER(PB_LLVM), test_not_in);
+ g_test_add_data_func("/core/parser/llvm/nothing_p", GINT_TO_POINTER(PB_LLVM), test_nothing_p);
#endif /* defined(HAMMER_LLVM_BACKEND) */
}
--
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