In output_op_compare() everything that is not of interger
type is treated as floats. Pointers disagree.
Fix this by rearranging the code and treat pointers like integers
as required for LLVM's icmp.
Reported-by: Dibyendu Majumdar <mobile@xxxxxxxxxxxxxxx>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
sparse-llvm.c | 17 +++++++++++++++--
validation/backend/pointer-cmp.c | 9 +++++++++
2 files changed, 24 insertions(+), 2 deletions(-)
create mode 100644 validation/backend/pointer-cmp.c
diff --git a/sparse-llvm.c b/sparse-llvm.c
index c64bfe2f7..86c57ab33 100644
--- a/sparse-llvm.c
+++ b/sparse-llvm.c
@@ -596,14 +596,27 @@ static void output_op_compare(struct function *fn, struct instruction *insn)
LLVMTypeRef dst_type = insn_symbol_type(insn);
- if (LLVMGetTypeKind(LLVMTypeOf(lhs)) == LLVMIntegerTypeKind) {
+ switch (LLVMGetTypeKind(LLVMTypeOf(lhs))) {
+ case LLVMPointerTypeKind:
+ case LLVMIntegerTypeKind: {
LLVMIntPredicate op = translate_op(insn->opcode);
target = LLVMBuildICmp(fn->builder, op, lhs, rhs, target_name);
- } else {
+ break;
+ }
+ case LLVMHalfTypeKind:
+ case LLVMFloatTypeKind:
+ case LLVMDoubleTypeKind:
+ case LLVMX86_FP80TypeKind:
+ case LLVMFP128TypeKind:
+ case LLVMPPC_FP128TypeKind: {
LLVMRealPredicate op = translate_fop(insn->opcode);
target = LLVMBuildFCmp(fn->builder, op, lhs, rhs, target_name);
+ break;
+ }
+ default:
+ assert(0);
}
target = LLVMBuildZExt(fn->builder, target, dst_type, target_name);
diff --git a/validation/backend/pointer-cmp.c b/validation/backend/pointer-cmp.c
new file mode 100644
index 000000000..fa76d1b57
--- /dev/null
+++ b/validation/backend/pointer-cmp.c
@@ -0,0 +1,9 @@
+int cmpint( int x, int y) { return x == y; }
+int cmpflt( float x, float y) { return x == y; }
+int cmpvptr(void *x, void *y) { return x == y; }
+int cmpiptr(int *x, int *y) { return x == y; }
+
+/*
+ * check-name: pointer comparison
+ * check-command: ./sparsec -Wno-decl -c $file -o tmp.o
+ */
--
2.12.0
--
To unsubscribe from this list: send the line "unsubscribe linux-sparse" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
