1 files changed, 67 insertions, 0 deletions
diff --git a/test/CodeGen/X86/dec-eflags-lower.ll b/test/CodeGen/X86/dec-eflags-lower.ll
new file mode 100644
index 0000000000..190819f4cf
--- /dev/null
+++ b/test/CodeGen/X86/dec-eflags-lower.ll
@@ -0,0 +1,67 @@
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+
+%struct.obj = type { i64 }
+
+; CHECK: _Z7releaseP3obj
+define void @_Z7releaseP3obj(%struct.obj* nocapture %o) nounwind uwtable ssp {
+entry:
+; CHECK: decq	(%{{rdi|rcx}})
+; CHECK-NEXT: je
+  %refcnt = getelementptr inbounds %struct.obj* %o, i64 0, i32 0
+  %0 = load i64* %refcnt, align 8, !tbaa !0
+  %dec = add i64 %0, -1
+  store i64 %dec, i64* %refcnt, align 8, !tbaa !0
+  %tobool = icmp eq i64 %dec, 0
+  br i1 %tobool, label %if.end, label %return
+
+if.end:                                           ; preds = %entry
+  %1 = bitcast %struct.obj* %o to i8*
+  tail call void @free(i8* %1)
+  br label %return
+
+return:                                           ; preds = %entry, %if.end
+  ret void
+}
+
+@c = common global i64 0, align 8
+@a = common global i32 0, align 4
+@.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1
+@b = common global i32 0, align 4
+
+; CHECK: test
+define i32 @test() nounwind uwtable ssp {
+entry:
+; CHECK: decq
+; CHECK-NOT: decq
+%0 = load i64* @c, align 8, !tbaa !0
+%dec.i = add nsw i64 %0, -1
+store i64 %dec.i, i64* @c, align 8, !tbaa !0
+%tobool.i = icmp ne i64 %dec.i, 0
+%lor.ext.i = zext i1 %tobool.i to i32
+store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3
+%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
+ret i32 0
+}
+
+; CHECK: test2
+define i32 @test2() nounwind uwtable ssp {
+entry:
+; CHECK-NOT: decq ({{.*}})
+%0 = load i64* @c, align 8, !tbaa !0
+%dec.i = add nsw i64 %0, -1
+store i64 %dec.i, i64* @c, align 8, !tbaa !0
+%tobool.i = icmp ne i64 %0, 0
+%lor.ext.i = zext i1 %tobool.i to i32
+store i32 %lor.ext.i, i32* @a, align 4, !tbaa !3
+%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
+ret i32 0
+}
+
+declare i32 @printf(i8* nocapture, ...) nounwind
+
+declare void @free(i8* nocapture) nounwind
+
+!0 = metadata !{metadata !"long", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA", null}
+!3 = metadata !{metadata !"int", metadata !1}