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llvm-project/llvm/test/Instrumentation/MemorySanitizer/opaque-ptr.ll

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[MSan] Ensure argument shadow initialized on memcpy We need to explicitly query the shadow here, because it is lazily initialized for byval arguments. Without opaque pointers this used to mostly work out, because there would be a bitcast to `i8*` present, and that would query, and copy in case of byval, the argument shadow. Reviewed By: vitalybuka, eugenis Differential Revision: https://reviews.llvm.org/D123602
2022-04-13 04:45:53 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=msan < %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
define void @test_memcpy(ptr %p, ptr byval(i32) %p2) sanitize_memory {
; CHECK-LABEL: @test_memcpy(
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint ptr [[P2:%.*]] to i64
; CHECK-NEXT: [[TMP2:%.*]] = xor i64 [[TMP1]], 87960930222080
; CHECK-NEXT: [[TMP3:%.*]] = inttoptr i64 [[TMP2]] to ptr
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[TMP3]], ptr align 4 inttoptr (i64 add (i64 ptrtoint (ptr @__msan_param_tls to i64), i64 8) to ptr), i64 4, i1 false)
; CHECK-NEXT: call void @llvm.donothing()
; CHECK-NEXT: [[TMP4:%.*]] = call ptr @__msan_memcpy(ptr [[P:%.*]], ptr [[P2]], i64 4)
; CHECK-NEXT: ret void
;
call void @llvm.memcpy.p0.p0.i64(i8* %p, i8* %p2, i64 4, i1 false)
ret void
}
define void @test_memmove(ptr %p, ptr byval(i32) %p2) sanitize_memory {
; CHECK-LABEL: @test_memmove(
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint ptr [[P2:%.*]] to i64
; CHECK-NEXT: [[TMP2:%.*]] = xor i64 [[TMP1]], 87960930222080
; CHECK-NEXT: [[TMP3:%.*]] = inttoptr i64 [[TMP2]] to ptr
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[TMP3]], ptr align 4 inttoptr (i64 add (i64 ptrtoint (ptr @__msan_param_tls to i64), i64 8) to ptr), i64 4, i1 false)
; CHECK-NEXT: call void @llvm.donothing()
; CHECK-NEXT: [[TMP4:%.*]] = call ptr @__msan_memmove(ptr [[P:%.*]], ptr [[P2]], i64 4)
; CHECK-NEXT: ret void
;
call void @llvm.memmove.p0.p0.i64(i8* %p, i8* %p2, i64 4, i1 false)
ret void
}
declare void @llvm.memcpy.p0.p0.i64(i8*, i8*, i64, i1)
declare void @llvm.memmove.p0.p0.i64(i8*, i8*, i64, i1)