| ; Check that we don't replace uses in cmp with wrapper (which would accidentally optimize out the cmp). |
| ; RUN: opt < %s -dfsan -dfsan-abilist=%S/Inputs/abilist.txt -S | FileCheck %s |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; CHECK: @__dfsan_shadow_width_bits = weak_odr constant i32 [[#SBITS:]] |
| ; CHECK: @__dfsan_shadow_width_bytes = weak_odr constant i32 [[#SBYTES:]] |
| |
| ; CHECK: declare extern_weak i8 @ExternWeak(i8) |
| declare extern_weak i8 @ExternWeak(i8) |
| |
| define noundef i8 @call_if_exists() local_unnamed_addr { |
| ; CHECK-LABEL: @call_if_exists.dfsan |
| ; Ensure comparison is preserved |
| ; CHECK: br i1 icmp ne ([[FUNCPTRTY:.*]] @ExternWeak, [[FUNCPTRTY]] null), label %use_func, label %avoid_func |
| br i1 icmp ne (i8 (i8)* @ExternWeak, i8 (i8)* null), label %use_func, label %avoid_func |
| |
| use_func: |
| ; CHECK: use_func: |
| ; Ensure extern weak function is validated before being called. |
| ; CHECK: call void @__dfsan_wrapper_extern_weak_null({{[^,]*}}@ExternWeak{{[^,]*}}, {{.*}}) |
| ; CHECK-NEXT: call i8 @ExternWeak(i8 {{.*}}) |
| %1 = call i8 @ExternWeak(i8 4) |
| br label %end |
| |
| avoid_func: |
| ; CHECK: avoid_func: |
| br label %end |
| |
| end: |
| ; CHECK: end: |
| %r = phi i8 [ %1, %use_func ], [ 0, %avoid_func ] |
| ret i8 %r |
| } |
| |
