This patch implement code generation for OP_PTRCAST using LLVMBuildBitCast().
Cc: Christopher Li <sparse@xxxxxxxxxxx>
Cc: Jeff Garzik <jgarzik@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
sparse-llvm.c | 20 +++++++++++++++++++-
validation/backend/ptrcast.c | 9 +++++++++
2 files changed, 28 insertions(+), 1 deletions(-)
create mode 100644 validation/backend/ptrcast.c
diff --git a/sparse-llvm.c b/sparse-llvm.c
index 1a2a34d..e3d8883 100644
--- a/sparse-llvm.c
+++ b/sparse-llvm.c
@@ -812,6 +812,24 @@ static void output_op_phi(struct function *fn, struct instruction *insn)
insn->target->priv = target;
}
+static void output_op_ptrcast(struct function *fn, struct instruction *insn)
+{
+ LLVMValueRef src, target;
+ char target_name[64];
+
+ src = insn->src->priv;
+ if (!src)
+ src = pseudo_to_value(fn, insn, insn->src);
+
+ pseudo_name(insn->target, target_name);
+
+ assert(!symbol_is_fp_type(insn->type));
+
+ target = LLVMBuildBitCast(fn->builder, src, insn_symbol_type(fn->module, insn), target_name);
+
+ insn->target->priv = target;
+}
+
static void output_op_cast(struct function *fn, struct instruction *insn, LLVMOpcode op)
{
LLVMValueRef src, target;
@@ -917,7 +935,7 @@ static void output_insn(struct function *fn, struct instruction *insn)
assert(0);
break;
case OP_PTRCAST:
- assert(0);
+ output_op_ptrcast(fn, insn);
break;
case OP_BINARY ... OP_BINARY_END:
case OP_BINCMP ... OP_BINCMP_END:
diff --git a/validation/backend/ptrcast.c b/validation/backend/ptrcast.c
new file mode 100644
index 0000000..46f8add
--- /dev/null
+++ b/validation/backend/ptrcast.c
@@ -0,0 +1,9 @@
+static char *ptrcast(unsigned long *x)
+{
+ return (unsigned char *) x;
+}
+
+/*
+ * check-name: Pointer cast code generation
+ * check-command: ./sparsec -c $file -o tmp.o
+ */
--
1.7.6.4
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