Issue 63221: Avoid indirect jumps when calling into runtime

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Issue 63221: Avoid indirect jumps when calling into runtime

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Created:
16 years, 7 months ago by Jeffrey Yasskin

Modified:
16 years, 5 months ago

Reviewers:

Base URL:
http://unladen-swallow.googlecode.com/svn/trunk/

Visibility:
Public.

This patch allocated space for JITted code in the low 31 bits of the address space so that it's within a signed 32-bit offset of the statically-compiled runtime. Then it makes the standard call stubs include direct jumps instead of indirect jumps for targets that are close enough. If anything, this makes the code slower.

Patch Set 1 #

Created: 16 years, 7 months ago

Download [raw] [tar.bz2]

Unified diffs	Side-by-side diffs	Delta from patch set	Stats (+21 lines, -8 lines)			Patch
M	Util/llvm/lib/System/Unix/Memory.inc	View	1 chunk	+1 line, -1 line	0 comments	Download
M	Util/llvm/lib/Target/X86/X86JITInfo.cpp	View	1 chunk	+20 lines, -7 lines	0 comments	Download

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