[LLVMbugs] [Bug 11729] New: #pragma iwdep support
bugzilla-daemon at llvm.org
bugzilla-daemon at llvm.org
Mon Jan 9 07:12:06 PST 2012
http://llvm.org/bugs/show_bug.cgi?id=11729
Bug #: 11729
Summary: #pragma iwdep support
Product: clang
Version: trunk
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
AssignedTo: unassignedclangbugs at nondot.org
ReportedBy: ysangkok+llvmbugzilla at gmail.com
CC: llvmbugs at cs.uiuc.edu
Classification: Unclassified
See also: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33426
#pragma ivdep
Says the compiler may assume the following loop nest does not have loop carried
data dependenices.
Supported at least by SGI CC and the Intel compiler.
The SGI compiler restricts the pragma to innermost loops. The Intel compiler
restricts the pragma to affect assumed data-dependencies only, that is, if
data dependence analysis statically can prove a data-dependency this
dependency is _not_ ignored.
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