1 files changed, 110 insertions, 0 deletions
diff --git a/llvm/test/Instrumentation/MemorySanitizer/X86/vararg_call.ll b/llvm/test/Instrumentation/MemorySanitizer/X86/vararg_call.ll
new file mode 100644
index 00000000000..79817a889ca
--- /dev/null
+++ b/llvm/test/Instrumentation/MemorySanitizer/X86/vararg_call.ll
@@ -0,0 +1,110 @@
+; RUN: opt < %s -msan -msan-check-access-address=0 -S | FileCheck %s
+; RUN: opt < %s -msan -msan-check-access-address=0 -msan-track-origins=1 -S | FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN
+; RUN: opt < %s -msan -msan-check-access-address=0 -msan-track-origins=2 -S | FileCheck %s --check-prefixes=CHECK,CHECK-ORIGIN
+
+; Test that shadow and origin are stored for variadic function params.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.__va_list_tag = type { i32, i32, i8*, i8* }
+
+define dso_local i32 @test(i32 %a, i32 %b, i32 %c) local_unnamed_addr {
+entry:
+  %call = tail call i32 (i32, ...) @sum(i32 3, i32 %a, i32 %b, i32 %c)
+  ret i32 %call
+}
+
+; CHECK: store i32 0, {{.*}} @__msan_param_tls {{.*}} i64 8
+; CHECK: store i32 0, {{.*}} @__msan_param_tls {{.*}} i64 16
+; CHECK: store i32 0, {{.*}} @__msan_param_tls {{.*}} i64 24
+; CHECK: store i32 0, {{.*}} @__msan_va_arg_tls {{.*}} i64 8
+; CHECK-ORIGIN: store i32 0, {{.*}} @__msan_va_arg_origin_tls {{.*}} i64 8
+; CHECK: store i32 0, {{.*}} @__msan_va_arg_tls {{.*}} i64 16
+; CHECK-ORIGIN: store i32 0, {{.*}} @__msan_va_arg_origin_tls {{.*}} i64 16
+; CHECK: store i32 0, {{.*}} @__msan_va_arg_tls {{.*}} i64 24
+; CHECK-ORIGIN: store i32 0, {{.*}} @__msan_va_arg_origin_tls {{.*}} i64 24
+
+define dso_local i32 @sum(i32 %n, ...) local_unnamed_addr #0 {
+entry:
+  %args = alloca [1 x %struct.__va_list_tag], align 16
+  %0 = bitcast [1 x %struct.__va_list_tag]* %args to i8*
+  call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull %0) #2
+  call void @llvm.va_start(i8* nonnull %0)
+  %cmp9 = icmp sgt i32 %n, 0
+  br i1 %cmp9, label %for.body.lr.ph, label %for.end
+
+; CHECK: [[VA_ARG_TLS:%[_0-9a-z]+]] = bitcast {{.*}} @__msan_va_arg_tls
+; CHECK: call void @llvm.memcpy.{{.*}} [[SHADOW_COPY:%[_0-9a-z]+]], {{.*}} [[VA_ARG_TLS]]
+; CHECK-ORIGIN: [[VA_ARG_ORIGIN_TLS:%[_0-9a-z]+]] = bitcast {{.*}} @__msan_va_arg_origin_tls
+; CHECK-ORIGIN: call void @llvm.memcpy{{.*}} [[ORIGIN_COPY:%[_0-9a-z]+]], {{.*}} [[VA_ARG_ORIGIN_TLS]]
+
+; CHECK: call void @llvm.va_start
+; CHECK: call void @llvm.memcpy.{{.*}}, {{.*}} [[SHADOW_COPY]], i{{.*}} [[REGSAVE:[0-9]+]]
+; CHECK-ORIGIN: call void @llvm.memcpy.{{.*}}, {{.*}} [[ORIGIN_COPY]], i{{.*}} [[REGSAVE]]
+
+; CHECK: [[OVERFLOW_SHADOW:%[_0-9a-z]+]] = getelementptr i8, i8* [[SHADOW_COPY]], i{{.*}} [[REGSAVE]]
+; CHECK: call void @llvm.memcpy.{{.*}}[[OVERFLOW_SHADOW]]
+; CHECK-ORIGIN: [[OVERFLOW_ORIGIN:%[_0-9a-z]+]] = getelementptr i8, i8* [[ORIGIN_COPY]], i{{.*}} [[REGSAVE]]
+; CHECK-ORIGIN: call void @llvm.memcpy.{{.*}}[[OVERFLOW_ORIGIN]]
+
+for.body.lr.ph:                                   ; preds = %entry
+  %gp_offset_p = getelementptr inbounds [1 x %struct.__va_list_tag], [1 x %struct.__va_list_tag]* %args, i64 0, i64 0, i32 0
+  %1 = getelementptr inbounds [1 x %struct.__va_list_tag], [1 x %struct.__va_list_tag]* %args, i64 0, i64 0, i32 3
+  %overflow_arg_area_p = getelementptr inbounds [1 x %struct.__va_list_tag], [1 x %struct.__va_list_tag]* %args, i64 0, i64 0, i32 2
+  %gp_offset.pre = load i32, i32* %gp_offset_p, align 16
+  br label %for.body
+
+for.body:                                         ; preds = %vaarg.end, %for.body.lr.ph
+  %gp_offset = phi i32 [ %gp_offset.pre, %for.body.lr.ph ], [ %gp_offset12, %vaarg.end ]
+  %sum.011 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %vaarg.end ]
+  %i.010 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %vaarg.end ]
+  %fits_in_gp = icmp ult i32 %gp_offset, 41
+  br i1 %fits_in_gp, label %vaarg.in_reg, label %vaarg.in_mem
+
+vaarg.in_reg:                                     ; preds = %for.body
+  %reg_save_area = load i8*, i8** %1, align 16
+  %2 = sext i32 %gp_offset to i64
+  %3 = getelementptr i8, i8* %reg_save_area, i64 %2
+  %4 = add i32 %gp_offset, 8
+  store i32 %4, i32* %gp_offset_p, align 16
+  br label %vaarg.end
+
+vaarg.in_mem:                                     ; preds = %for.body
+  %overflow_arg_area = load i8*, i8** %overflow_arg_area_p, align 8
+  %overflow_arg_area.next = getelementptr i8, i8* %overflow_arg_area, i64 8
+  store i8* %overflow_arg_area.next, i8** %overflow_arg_area_p, align 8
+  br label %vaarg.end
+
+vaarg.end:                                        ; preds = %vaarg.in_mem, %vaarg.in_reg
+  %gp_offset12 = phi i32 [ %4, %vaarg.in_reg ], [ %gp_offset, %vaarg.in_mem ]
+  %vaarg.addr.in = phi i8* [ %3, %vaarg.in_reg ], [ %overflow_arg_area, %vaarg.in_mem ]
+  %vaarg.addr = bitcast i8* %vaarg.addr.in to i32*
+  %5 = load i32, i32* %vaarg.addr, align 4
+  %add = add nsw i32 %5, %sum.011
+  %inc = add nuw nsw i32 %i.010, 1
+  %exitcond = icmp eq i32 %inc, %n
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %vaarg.end, %entry
+  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %vaarg.end ]
+  call void @llvm.va_end(i8* nonnull %0)
+  call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull %0) #2
+  ret i32 %sum.0.lcssa
+}
+
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
+
+; Function Attrs: nounwind
+declare void @llvm.va_start(i8*) #2
+
+; Function Attrs: nounwind
+declare void @llvm.va_end(i8*) #2
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
+
+
+;declare dso_local i32 @sum(i32, ...) local_unnamed_addr