| ; RUN: opt < %s -msan -msan-check-access-address=1 -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" |
| |
| |
| ; Test byval argument shadow alignment |
| |
| define <2 x i64> @ByValArgumentShadowLargeAlignment(<2 x i64>* byval %p) sanitize_memory { |
| entry: |
| %x = load <2 x i64>, <2 x i64>* %p |
| ret <2 x i64> %x |
| } |
| |
| ; CHECK-LABEL: @ByValArgumentShadowLargeAlignment |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 {{.*}}, i8* align 8 {{.*}}, i64 16, i1 false) |
| ; CHECK: ret <2 x i64> |
| |
| |
| define i16 @ByValArgumentShadowSmallAlignment(i16* byval %p) sanitize_memory { |
| entry: |
| %x = load i16, i16* %p |
| ret i16 %x |
| } |
| |
| ; CHECK-LABEL: @ByValArgumentShadowSmallAlignment |
| ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 2 {{.*}}, i8* align 2 {{.*}}, i64 2, i1 false) |
| ; CHECK: ret i16 |
| |
| |
| ; Check instrumentation of stores. The check must precede the shadow store. |
| |
| define void @Store(i32* nocapture %p, i32 %x) nounwind uwtable sanitize_memory { |
| entry: |
| store i32 %x, i32* %p, align 4 |
| ret void |
| } |
| |
| ; CHECK-LABEL: @Store |
| ; CHECK: load {{.*}} @__msan_param_tls |
| ; Shadow calculations must happen after the check. |
| ; CHECK-NOT: xor |
| ; CHECK: icmp |
| ; CHECK: br i1 |
| ; CHECK: <label> |
| ; CHECK: call void @__msan_warning_noreturn |
| ; CHECK: <label> |
| ; CHECK: xor |
| ; CHECK: store |
| ; CHECK: store i32 %x |
| ; CHECK: ret void |
| |
| |