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| author | Eric Christopher <echristo@gmail.com> | 2019-04-17 04:52:47 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@gmail.com> | 2019-04-17 04:52:47 +0000 |
| commit | cee313d288a4faf0355d76fb6e0e927e211d08a5 (patch) | |
| tree | d386075318d761197779a96e5d8fc0dc7b06342b /llvm/test/Transforms/SafeStack/X86/layout-frag.ll | |
| parent | c3d6a929fdd92fd06d4304675ade8d7210ee711a (diff) | |
| download | bcm5719-llvm-cee313d288a4faf0355d76fb6e0e927e211d08a5.tar.gz bcm5719-llvm-cee313d288a4faf0355d76fb6e0e927e211d08a5.zip | |
Revert "Temporarily Revert "Add basic loop fusion pass.""
The reversion apparently deleted the test/Transforms directory.
Will be re-reverting again.
llvm-svn: 358552
Diffstat (limited to 'llvm/test/Transforms/SafeStack/X86/layout-frag.ll')
| -rw-r--r-- | llvm/test/Transforms/SafeStack/X86/layout-frag.ll | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SafeStack/X86/layout-frag.ll b/llvm/test/Transforms/SafeStack/X86/layout-frag.ll new file mode 100644 index 00000000000..b9831c26b74 --- /dev/null +++ b/llvm/test/Transforms/SafeStack/X86/layout-frag.ll @@ -0,0 +1,39 @@ +; Test that safestack layout reuses a region w/o fragmentation. +; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s + +define void @f() safestack { +; CHECK-LABEL: define void @f +entry: +; CHECK: %[[USP:.*]] = load i8*, i8** @__safestack_unsafe_stack_ptr +; CHECK: getelementptr i8, i8* %[[USP]], i32 -16 + + %x0 = alloca i64, align 8 + %x1 = alloca i8, align 1 + %x2 = alloca i64, align 8 + + %x0a = bitcast i64* %x0 to i8* + %x2a = bitcast i64* %x2 to i8* + + call void @llvm.lifetime.start.p0i8(i64 4, i8* %x0a) + call void @capture64(i64* %x0) + call void @llvm.lifetime.end.p0i8(i64 4, i8* %x0a) + + call void @llvm.lifetime.start.p0i8(i64 4, i8* %x1) + call void @llvm.lifetime.start.p0i8(i64 4, i8* %x2a) + call void @capture8(i8* %x1) + call void @capture64(i64* %x2) + call void @llvm.lifetime.end.p0i8(i64 4, i8* %x1) + call void @llvm.lifetime.end.p0i8(i64 4, i8* %x2a) + +; Test that i64 allocas share space. +; CHECK: getelementptr i8, i8* %unsafe_stack_ptr, i32 -8 +; CHECK: getelementptr i8, i8* %unsafe_stack_ptr, i32 -9 +; CHECK: getelementptr i8, i8* %unsafe_stack_ptr, i32 -8 + + ret void +} + +declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) +declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) +declare void @capture8(i8*) +declare void @capture64(i64*) |
