diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -2887,6 +2887,8 @@
     return V;
   }
 
+  annotateNonNullNoUndefBasedOnAccess(CI, 0);
+
   // printf(format, ...) -> iprintf(format, ...) if no floating point
   // arguments.
   if (isLibFuncEmittable(M, TLI, LibFunc_iprintf) &&
@@ -2911,7 +2913,6 @@
     return New;
   }
 
-  annotateNonNullNoUndefBasedOnAccess(CI, 0);
   return nullptr;
 }
 
@@ -3010,6 +3011,8 @@
     return V;
   }
 
+  annotateNonNullNoUndefBasedOnAccess(CI, {0, 1});
+
   // sprintf(str, format, ...) -> siprintf(str, format, ...) if no floating
   // point arguments.
   if (isLibFuncEmittable(M, TLI, LibFunc_siprintf) &&
@@ -3034,7 +3037,6 @@
     return New;
   }
 
-  annotateNonNullNoUndefBasedOnAccess(CI, {0, 1});
   return nullptr;
 }
 
diff --git a/llvm/test/Transforms/InstCombine/printf-1.ll b/llvm/test/Transforms/InstCombine/printf-1.ll
--- a/llvm/test/Transforms/InstCombine/printf-1.ll
+++ b/llvm/test/Transforms/InstCombine/printf-1.ll
@@ -127,7 +127,7 @@
 ; CHECK-NEXT:    ret void
 ;
 ; CHECK-IPRINTF-LABEL: @test_simplify7(
-; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @iprintf(ptr nonnull @percent_d, i32 187)
+; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @iprintf(ptr noundef nonnull dereferenceable(1) @percent_d, i32 187)
 ; CHECK-IPRINTF-NEXT:    ret void
 ;
   call i32 (ptr, ...) @printf(ptr @percent_d, i32 187)
@@ -166,7 +166,7 @@
 ; CHECK-NEXT:    ret i32 [[RET]]
 ;
 ; CHECK-IPRINTF-LABEL: @test_no_simplify3(
-; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @iprintf(ptr nonnull @h)
+; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ...) @iprintf(ptr noundef nonnull dereferenceable(1) @h)
 ; CHECK-IPRINTF-NEXT:    ret i32 [[TMP1]]
 ;
   %ret = call i32 (ptr, ...) @printf(ptr @h)
diff --git a/llvm/test/Transforms/InstCombine/sprintf-1.ll b/llvm/test/Transforms/InstCombine/sprintf-1.ll
--- a/llvm/test/Transforms/InstCombine/sprintf-1.ll
+++ b/llvm/test/Transforms/InstCombine/sprintf-1.ll
@@ -79,7 +79,7 @@
 
 define void @test_simplify6(ptr %dst) {
 ; CHECK-IPRINTF-LABEL: @test_simplify6(
-; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ptr, ...) @siprintf(ptr [[DST:%.*]], ptr nonnull @percent_d, i32 187)
+; CHECK-IPRINTF-NEXT:    [[TMP1:%.*]] = call i32 (ptr, ptr, ...) @siprintf(ptr noundef nonnull dereferenceable(1) [[DST:%.*]], ptr noundef nonnull dereferenceable(1) @percent_d, i32 187)
 ; CHECK-IPRINTF-NEXT:    ret void
 ;
 ; WIN-LABEL: @test_simplify6(