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[safestack] Disable stack coloring by default.

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Workaround for apparent miscompilation of PR32143.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303456 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evgeniy Stepanov 2017-05-19 20:58:48 +00:00
parent fc18e2f236
commit 794ffc40e2
5 changed files with 8 additions and 7 deletions
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3
lib/CodeGen/SafeStackColoring.cpp
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@ -20,9 +20,10 @@ using namespace llvm::safestack;
#define DEBUG_TYPE "safestackcoloring"
// Disabled by default due to PR32143.
static cl::opt<bool> ClColoring("safe-stack-coloring",
cl::desc("enable safe stack coloring"),
cl::Hidden, cl::init(true));
cl::Hidden, cl::init(false));
const StackColoring::LiveRange &StackColoring::getLiveRange(AllocaInst *AI) {
const auto IT = AllocaNumbering.find(AI);

2
test/Transforms/SafeStack/X86/coloring-ssp.ll
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@ -1,4 +1,4 @@
; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; %x and %y share a stack slot between them, but not with the stack guard.
define void @f() safestack sspreq {

4
test/Transforms/SafeStack/X86/coloring.ll
View File

@ -1,5 +1,5 @@
; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
define void @f() safestack {
entry:

4
test/Transforms/SafeStack/X86/coloring2.ll
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@ -1,5 +1,5 @@
; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s
; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; x and y share the stack slot.
define void @f() safestack {

2
test/Transforms/SafeStack/X86/layout-frag.ll
View File

@ -1,5 +1,5 @@
; Test that safestack layout reuses a region w/o fragmentation.
; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
; 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