4 Commits

Author	SHA1	Message	Date
Renato Golin	93064025bd	Revert "[ARM] Enable shrink-wrapping by default." ... This reverts commit r252825, as it broke ASAN on ARM. Investigating... llvm-svn: 252889	2015-11-12 13:34:50 +00:00
Quentin Colombet	10f9813528	[ARM] Enable shrink-wrapping by default. ... Differential Revision: http://reviews.llvm.org/D14357 rdar://problem/21942589 llvm-svn: 252825	2015-11-11 23:31:46 +00:00
Peter Collingbourne	d27d3a151f	ARM: Align functions containing Thumb-2 jump tables to 4 bytes. ... Functions with jump tables need an alignment of 4 because they use the ADR instruction, which aligns the PC to 4 bytes before adding an offset. Differential Revision: http://reviews.llvm.org/D9424 llvm-svn: 236327	2015-05-01 18:05:59 +00:00
Peter Collingbourne	1213918bf4	ARM: Only enforce 4-byte alignment on Thumb-2 functions with constant pools. ... This appears to have been introduced back in r76698 as part of an unrelated change. I can find no official ARM documentation stating that Thumb-2 functions require 4-byte alignment; in fact, ARM documentation appears to contradict this (see, e.g., ARM Architecture Reference Manual Thumb-2 Supplement, section 2.6.1: "Thumb-2 enforces 16-bit alignment on all instructions."). Also remove code that sets alignment for ARM functions, which is redundant with code in the MachineFunction constructor, and remove the hidden -arm-align-constant-islands flag, which has been enabled by default since r146739 (Dec 2011) and has probably received sufficient testing by now. Differential Revision: http://reviews.llvm.org/D9138 llvm-svn: 235636	2015-04-23 20:31:22 +00:00