4 Commits

Author	SHA1	Message	Date
Tim Northover	2ac7e4b3ee	ARM: correctly expand LDR-lit based globals. ... Quite a major error here: the expansions for the Pseudos with and without folded load were mixed up. Fortunately it only affects ARM-mode, when not using movw/movt, on Darwin. I'm guessing no-one actually uses that combination. llvm-svn: 223986	2014-12-10 23:40:50 +00:00
Akira Hatanaka	2ee0e9e6ee	[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 llvm-svn: 220470	2014-10-23 04:17:05 +00:00
Akira Hatanaka	dc08c30df9	[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> llvm-svn: 214614	2014-08-02 05:40:40 +00:00
Akira Hatanaka	e5b6e0d231	[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> llvm-svn: 213967	2014-07-25 19:31:34 +00:00