Oliver Stannard 930aaa18e9 [ARM] Generate consistent frame records for Thumb2 ... There is not an official documented ABI for frame pointers in Thumb2, but we should try to emit something which is useful. We use r7 as the frame pointer for Thumb code, which currently means that if a function needs to save a high register (r8-r11), it will get pushed to the stack between the frame pointer (r7) and link register (r14). This means that while a stack unwinder can follow the chain of frame pointers up the stack, it cannot know the offset to lr, so does not know which functions correspond to the stack frames. To fix this, we need to push the callee-saved registers in two batches, with the first push saving the low registers, fp and lr, and the second push saving the high registers. This is already implemented, but previously only used for iOS. This patch turns it on for all Thumb2 targets when frame pointers are required by the ABI, and the frame pointer is r7 (Windows uses r11, so this isn't a problem there). If frame pointer elimination is enabled we still emit a single push/pop even if we need a frame pointer for other reasons, to avoid increasing code size. We must also ensure that lr is pushed to the stack when using a frame pointer, so that we end up with a complete frame record. Situations that could cause this were rare, because we already push lr in most situations so that we can return using the pop instruction. Differential Revision: https://reviews.llvm.org/D23516 llvm-svn: 279506		2016-08-23 09:19:22 +00:00
..
AArch64	Local variables whose address is taken and passed on to a call are described	2016-08-15 18:18:26 +00:00
ARM	[ARM] Generate consistent frame records for Thumb2	2016-08-23 09:19:22 +00:00
COFF	Resubmit "Write the TPI stream from a PDB to Yaml."	2016-08-18 16:49:29 +00:00
Generic	Unxfail passing tests on Hexagon	2016-08-19 15:07:58 +00:00
Inputs	Synchronize LLVM and clang's ObjCDeclSpec::ObjCPropertyAttributeKind.	2016-07-14 00:41:18 +00:00
Lanai
Mips
MIR	MIRParser: Use shorter cfi identifiers	2016-07-26 18:20:00 +00:00
PDB	Resubmit "Write the TPI stream from a PDB to Yaml."	2016-08-18 16:49:29 +00:00
PowerPC
Sparc
SystemZ	[SystemZ] Save/restore r6 and r7 if function contains landing pad.	2016-06-28 14:13:11 +00:00
WebAssembly	[WebAssembly] Handle debug information and virtual registers without crashing (reland r278967)	2016-08-17 23:42:27 +00:00
X86	Move tests to the appropriate subdirectory.	2016-08-17 16:55:56 +00:00
arm-relocs.test
debuglineinfo-macho.test
debuglineinfo.test
debugmacinfo.test
dwarfdump-64-bit-dwarf.test
dwarfdump-accel.test	Synchronize LLVM and clang's ObjCDeclSpec::ObjCPropertyAttributeKind.	2016-07-14 00:41:18 +00:00
dwarfdump-debug-frame-simple.test
dwarfdump-debug-loc-simple.test
dwarfdump-dump-flags.test
dwarfdump-dwp.test
dwarfdump-invalid.test
dwarfdump-line-dwo.test
dwarfdump-macho-relocs.test
dwarfdump-macho-universal.test
dwarfdump-objc.test	Synchronize LLVM and clang's ObjCDeclSpec::ObjCPropertyAttributeKind.	2016-07-14 00:41:18 +00:00
dwarfdump-pubnames.test
dwarfdump-ranges.test
dwarfdump-type-units.test
dwarfdump-zlib.test
dwo.ll
llvm-symbolizer-split-dwarf-empty.test
llvm-symbolizer-zlib.test
llvm-symbolizer.test
macro_link.ll	[Debug Info] Added a LIT test that covers the fix committed in rL277290.	2016-08-11 07:22:53 +00:00
member-pointers.o
missing-abstract-variable.o
skeletoncu.ll	Unxfail passing tests on Hexagon	2016-08-19 15:07:58 +00:00