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| author | Peter Collingbourne <peter@pcc.me.uk> | 2015-03-19 22:02:10 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2015-03-19 22:02:10 +0000 |
| commit | 994ba3d29c44e232c719d448c57839f458e36a3f (patch) | |
| tree | f8ec57904b66c0f7364d085aa01491616b6cb068 /llvm/test/Transforms | |
| parent | 070843d60bb12ed4d4b16e278621cf08cd68f6a5 (diff) | |
| download | bcm5719-llvm-994ba3d29c44e232c719d448c57839f458e36a3f.tar.gz bcm5719-llvm-994ba3d29c44e232c719d448c57839f458e36a3f.zip | |
LowerBitSets: Avoid reusing byte set addresses.
Each use of the byte array uses a different alias. This makes the
backend less likely to reuse previously computed byte array addresses,
improving the security of the CFI mechanism based on this pass.
Differential Revision: http://reviews.llvm.org/D8455
llvm-svn: 232770
Diffstat (limited to 'llvm/test/Transforms')
| -rw-r--r-- | llvm/test/Transforms/LowerBitSets/simple.ll | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/llvm/test/Transforms/LowerBitSets/simple.ll b/llvm/test/Transforms/LowerBitSets/simple.ll index 34c2fdd011d..8694d67f460 100644 --- a/llvm/test/Transforms/LowerBitSets/simple.ll +++ b/llvm/test/Transforms/LowerBitSets/simple.ll @@ -38,6 +38,10 @@ target datalayout = "e-p:32:32" !llvm.bitsets = !{ !0, !1, !2, !3, !4, !5, !6, !7 } +; CHECK: @bits_use{{[0-9]*}} = private alias i8* @bits{{[0-9]*}} +; CHECK: @bits_use{{[0-9]*}} = private alias i8* @bits{{[0-9]*}} +; CHECK: @bits_use{{[0-9]*}} = private alias i8* @bits{{[0-9]*}} + ; CHECK: @a = alias getelementptr inbounds ({ i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }, { i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }* [[G]], i32 0, i32 0) ; CHECK: @b = alias getelementptr inbounds ({ i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }, { i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }* [[G]], i32 0, i32 2) ; CHECK: @c = alias getelementptr inbounds ({ i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }, { i32, [0 x i8], [63 x i32], [4 x i8], i32, [0 x i8], [2 x i32] }* [[G]], i32 0, i32 4) @@ -57,8 +61,8 @@ target datalayout = "e-p:32:32" ; CHECK-DARWIN: [[G]] = private constant -; CHECK: @bits = private alias getelementptr inbounds ([68 x i8], [68 x i8]* [[BA]], i32 0, i32 0) -; CHECK: @bits1 = private alias getelementptr inbounds ([68 x i8], [68 x i8]* [[BA]], i32 0, i32 0) +; CHECK: @bits{{[0-9]*}} = private alias getelementptr inbounds ([68 x i8], [68 x i8]* [[BA]], i32 0, i32 0) +; CHECK: @bits{{[0-9]*}} = private alias getelementptr inbounds ([68 x i8], [68 x i8]* [[BA]], i32 0, i32 0) declare i1 @llvm.bitset.test(i8* %ptr, metadata %bitset) nounwind readnone @@ -76,7 +80,7 @@ define i1 @foo(i32* %p) { ; CHECK: [[R6:%[^ ]*]] = icmp ult i32 [[R5]], 68 ; CHECK: br i1 [[R6]] - ; CHECK: [[R8:%[^ ]*]] = getelementptr i8, i8* @bits, i32 [[R5]] + ; CHECK: [[R8:%[^ ]*]] = getelementptr i8, i8* @bits_use{{[0-9]*}}, i32 [[R5]] ; CHECK: [[R9:%[^ ]*]] = load i8, i8* [[R8]] ; CHECK: [[R10:%[^ ]*]] = and i8 [[R9]], 1 ; CHECK: [[R11:%[^ ]*]] = icmp ne i8 [[R10]], 0 @@ -119,7 +123,7 @@ define i1 @baz(i32* %p) { ; CHECK: [[T6:%[^ ]*]] = icmp ult i32 [[T5]], 66 ; CHECK: br i1 [[T6]] - ; CHECK: [[T8:%[^ ]*]] = getelementptr i8, i8* @bits1, i32 [[T5]] + ; CHECK: [[T8:%[^ ]*]] = getelementptr i8, i8* @bits_use{{[0-9]*}}, i32 [[T5]] ; CHECK: [[T9:%[^ ]*]] = load i8, i8* [[T8]] ; CHECK: [[T10:%[^ ]*]] = and i8 [[T9]], 2 ; CHECK: [[T11:%[^ ]*]] = icmp ne i8 [[T10]], 0 |
