mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-25 00:29:20 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164768 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
1.9 KiB
LLVM
57 lines
1.9 KiB
LLVM
; RUN: opt < %s -basicaa -gvn -asan -S | FileCheck %s
|
|
; ASAN conflicts with load widening iff the widened load accesses data out of bounds
|
|
; (while the original unwidened loads do not).
|
|
; http://code.google.com/p/address-sanitizer/issues/detail?id=20#c1
|
|
|
|
|
|
; 32-bit little endian target.
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
|
|
|
|
%struct_of_7_bytes_4_aligned = type { i32, i8, i8, i8}
|
|
|
|
@f = global %struct_of_7_bytes_4_aligned zeroinitializer, align 4
|
|
|
|
; Accessing bytes 4 and 6, not ok to widen to i32 if address_safety is set.
|
|
|
|
define i32 @test_widening_bad(i8* %P) nounwind ssp noredzone address_safety {
|
|
entry:
|
|
%tmp = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 1), align 4
|
|
%conv = zext i8 %tmp to i32
|
|
%tmp1 = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 3), align 1
|
|
%conv2 = zext i8 %tmp1 to i32
|
|
%add = add nsw i32 %conv, %conv2
|
|
ret i32 %add
|
|
; CHECK: @test_widening_bad
|
|
; CHECK: __asan_report_load1
|
|
; CHECK: __asan_report_load1
|
|
; CHECK-NOT: __asan_report
|
|
; We can not use check for "ret" here because __asan_report_load1 calls live after ret.
|
|
; CHECK: end_test_widening_bad
|
|
}
|
|
|
|
define void @end_test_widening_bad() {
|
|
entry:
|
|
ret void
|
|
}
|
|
|
|
;; Accessing bytes 4 and 5. Ok to widen to i16.
|
|
|
|
define i32 @test_widening_ok(i8* %P) nounwind ssp noredzone address_safety {
|
|
entry:
|
|
%tmp = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 1), align 4
|
|
%conv = zext i8 %tmp to i32
|
|
%tmp1 = load i8* getelementptr inbounds (%struct_of_7_bytes_4_aligned* @f, i64 0, i32 2), align 1
|
|
%conv2 = zext i8 %tmp1 to i32
|
|
%add = add nsw i32 %conv, %conv2
|
|
ret i32 %add
|
|
; CHECK: @test_widening_ok
|
|
; CHECK: __asan_report_load2
|
|
; CHECK-NOT: __asan_report
|
|
; CHECK: end_test_widening_ok
|
|
}
|
|
|
|
define void @end_test_widening_ok() {
|
|
entry:
|
|
ret void
|
|
}
|