Adrian Prantl 076fd5dfc1 Move the complex address expression out of DIVariable and into an extra ... argument of the llvm.dbg.declare/llvm.dbg.value intrinsics. Previously, DIVariable was a variable-length field that has an optional reference to a Metadata array consisting of a variable number of complex address expressions. In the case of OpPiece expressions this is wasting a lot of storage in IR, because when an aggregate type is, e.g., SROA'd into all of its n individual members, the IR will contain n copies of the DIVariable, all alike, only differing in the complex address reference at the end. By making the complex address into an extra argument of the dbg.value/dbg.declare intrinsics, all of the pieces can reference the same variable and the complex address expressions can be uniqued across the CU, too. Down the road, this will allow us to move other flags, such as "indirection" out of the DIVariable, too. The new intrinsics look like this: declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr) declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr) This patch adds a new LLVM-local tag to DIExpressions, so we can detect and pretty-print DIExpression metadata nodes. What this patch doesn't do: This patch does not touch the "Indirect" field in DIVariable; but moving that into the expression would be a natural next step. http://reviews.llvm.org/D4919 rdar://problem/17994491 Thanks to dblaikie and dexonsmith for reviewing this patch! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218778 91177308-0d34-0410-b5e6-96231b3b80d8		2014-10-01 17:55:39 +00:00
..
AArch64	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
ARM	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
CPP
Generic	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
Hexagon	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
Inputs	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
Mips	[mips] For indirect calls we don't need $gp to point to .got. Mips linker	2014-10-01 08:22:21 +00:00
MSP430	Drop the W postfix on the 16-bit registers.	2014-09-10 06:58:14 +00:00
NVPTX	Revert r216862 due to a performance regression	2014-10-01 15:22:13 +00:00
PowerPC	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
R600	R600: Call EmitFunctionHeader() in the AsmPrinter to populate the ELF symbol table	2014-10-01 17:15:17 +00:00
SPARC	Add back tests for empty function in SPARC and PowerPC.	2014-09-15 22:11:07 +00:00
SystemZ
Thumb	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
Thumb2	[ARM] Allow selecting VRINT[APMXZR] and VCVT[BT] instructions for FPv5	2014-10-01 13:13:18 +00:00
X86	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00
XCore	Move the complex address expression out of DIVariable and into an extra	2014-10-01 17:55:39 +00:00