comparison test/Transforms/SafeStack/byval.ll @ 100:7d135dc70f03 LLVM 3.9

LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900 (2016-01-26)
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96:6418606d0ead 100:7d135dc70f03
1 ; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
2 ; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
3
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-unknown-linux-gnu"
6
7 %struct.S = type { [100 x i32] }
8
9 ; Safe access to a byval argument.
10 define i32 @ByValSafe(%struct.S* byval nocapture readonly align 8 %zzz) norecurse nounwind readonly safestack uwtable {
11 entry:
12 ; CHECK-LABEL: @ByValSafe
13 ; CHECK-NOT: __safestack_unsafe_stack_ptr
14 ; CHECK: ret i32
15 %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 3
16 %0 = load i32, i32* %arrayidx, align 4
17 ret i32 %0
18 }
19
20 ; Unsafe access to a byval argument.
21 ; Argument is copied to the unsafe stack.
22 define i32 @ByValUnsafe(%struct.S* byval nocapture readonly align 8 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
23 entry:
24 ; CHECK-LABEL: @ByValUnsafe
25 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
26 ; CHECK: store {{.*}} @__safestack_unsafe_stack_ptr
27 ; CHECK: %[[B:.*]] = getelementptr i8, i8* %[[A]], i32 -400
28 ; CHECK: %[[C:.*]] = bitcast %struct.S* %zzz to i8*
29 ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %[[B]], i8* %[[C]], i64 400, i32 8, i1 false)
30 ; CHECK: ret i32
31 %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx
32 %0 = load i32, i32* %arrayidx, align 4
33 ret i32 %0
34 }
35
36 ; Highly aligned byval argument.
37 define i32 @ByValUnsafeAligned(%struct.S* byval nocapture readonly align 64 %zzz, i64 %idx) norecurse nounwind readonly safestack uwtable {
38 entry:
39 ; CHECK-LABEL: @ByValUnsafeAligned
40 ; CHECK: %[[A:.*]] = load {{.*}} @__safestack_unsafe_stack_ptr
41 ; CHECK: %[[B:.*]] = ptrtoint i8* %[[A]] to i64
42 ; CHECK: and i64 %[[B]], -64
43 ; CHECK: ret i32
44 %arrayidx = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 0
45 %0 = load i32, i32* %arrayidx, align 64
46 %arrayidx2 = getelementptr inbounds %struct.S, %struct.S* %zzz, i64 0, i32 0, i64 %idx
47 %1 = load i32, i32* %arrayidx2, align 4
48 %add = add nsw i32 %1, %0
49 ret i32 %add
50 }
51