3 Commits

Author	SHA1	Message	Date
Akira Hatanaka	be9668675a	[ARM, stack protector] If supported, use armv7 instructions. ... This commit enables using movt/movw to load the stack guard address: movw r0, :lower16:(L_g3$non_lazy_ptr-(LPC0_0+8)) movt r0, :upper16:(L_g3$non_lazy_ptr-(LPC0_0+8)) ldr r0, [pc, r0] Previously a pc-relative load was emitted: ldr r0, LCPI0_0 ldr r0, [pc, r0] rdar://problem/18740489 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220470 91177308-0d34-0410-b5e6-96231b3b80d8	2014-10-23 04:17:05 +00:00
Akira Hatanaka	7e55ac7ce7	[ARM] In dynamic-no-pic mode, ARM's post-RA pseudo expansion was incorrectly ... expanding pseudo LOAD_STATCK_GUARD using instructions that are normally used in pic mode. This patch fixes the bug. <rdar://problem/17886592> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214614 91177308-0d34-0410-b5e6-96231b3b80d8	2014-08-02 05:40:40 +00:00
Akira Hatanaka	0651a556fe	[stack protector] Fix a potential security bug in stack protector where the ... address of the stack guard was being spilled to the stack. Previously the address of the stack guard would get spilled to the stack if it was impossible to keep it in a register. This patch introduces a new target independent node and pseudo instruction which gets expanded post-RA to a sequence of instructions that load the stack guard value. Register allocator can now just remat the value when it can't keep it in a register. <rdar://problem/12475629> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213967 91177308-0d34-0410-b5e6-96231b3b80d8	2014-07-25 19:31:34 +00:00