From dde29e2799b82bf76b263eac46acf3a1ae90d206 Mon Sep 17 00:00:00 2001 From: Evgeniy Stepanov Date: Tue, 5 Apr 2016 22:41:50 +0000 Subject: Faster stack-protector for Android/AArch64. Bionic has a defined thread-local location for the stack protector cookie. Emit a direct load instead of going through __stack_chk_guard. llvm-svn: 265481 --- llvm/test/CodeGen/X86/stack-protector-target.ll | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 llvm/test/CodeGen/X86/stack-protector-target.ll (limited to 'llvm/test/CodeGen/X86/stack-protector-target.ll') diff --git a/llvm/test/CodeGen/X86/stack-protector-target.ll b/llvm/test/CodeGen/X86/stack-protector-target.ll new file mode 100644 index 00000000000..3f69bfd7e7b --- /dev/null +++ b/llvm/test/CodeGen/X86/stack-protector-target.ll @@ -0,0 +1,25 @@ +; Test target-specific stack cookie location. +; RUN: llc -mtriple=i386-linux < %s -o - | FileCheck --check-prefix=LINUX-I386 %s +; RUN: llc -mtriple=x86_64-linux < %s -o - | FileCheck --check-prefix=LINUX-X64 %s +; RUN: llc -mtriple=i386-linux-android < %s -o - | FileCheck --check-prefix=LINUX-I386 %s +; RUN: llc -mtriple=x86_64-linux-android < %s -o - | FileCheck --check-prefix=LINUX-X64 %s + +define void @_Z1fv() sspreq { +entry: + %x = alloca i32, align 4 + %0 = bitcast i32* %x to i8* + call void @_Z7CapturePi(i32* nonnull %x) + ret void +} + +declare void @_Z7CapturePi(i32*) + +; LINUX-X64: movq %fs:40, %[[B:.*]] +; LINUX-X64: movq %[[B]], 16(%rsp) +; LINUX-X64: movq %fs:40, %[[C:.*]] +; LINUX-X64: cmpq 16(%rsp), %[[C]] + +; LINUX-I386: movl %gs:20, %[[B:.*]] +; LINUX-I386: movl %[[B]], 8(%esp) +; LINUX-I386: movl %gs:20, %[[C:.*]] +; LINUX-I386: cmpl 8(%esp), %[[C]] -- cgit v1.2.3