llvm/test/CodeGen/Thumb2/thumb2-jtb.ll
Chandler Carruth 9e67db4af1 Flip the new block-placement pass to be on by default.
This is mostly to test the waters. I'd like to get results from FNT
build bots and other bots running on non-x86 platforms.

This feature has been pretty heavily tested over the last few months by
me, and it fixes several of the execution time regressions caused by the
inlining work by preventing inlining decisions from radically impacting
block layout.

I've seen very large improvements in yacr2 and ackermann benchmarks,
along with the expected noise across all of the benchmark suite whenever
code layout changes. I've analyzed all of the regressions and fixed
them, or found them to be impossible to fix. See my email to llvmdev for
more details.

I'd like for this to be in 3.1 as it complements the inliner changes,
but if any failures are showing up or anyone has concerns, it is just
a flag flip and so can be easily turned off.

I'm switching it on tonight to try and get at least one run through
various folks' performance suites in case SPEC or something else has
serious issues with it. I'll watch bots and revert if anything shows up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154816 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-16 13:49:17 +00:00

129 lines
3.5 KiB
LLVM

; RUN: llc < %s -march=thumb -mattr=+thumb2 -arm-adjust-jump-tables=0 | not grep tbb
; Do not use tbb / tbh if any destination is before the jumptable.
; rdar://7102917
define i16 @main__getopt_internal_2E_exit_2E_ce(i32, i1 %b) nounwind {
entry:
br i1 %b, label %codeRepl127.exitStub, label %newFuncRoot
newFuncRoot:
br label %_getopt_internal.exit.ce
codeRepl127.exitStub: ; preds = %_getopt_internal.exit.ce
; Add an explicit edge back to before the jump table to ensure this block
; is placed first.
br i1 %b, label %newFuncRoot, label %codeRepl127.exitStub.exit
codeRepl127.exitStub.exit:
ret i16 0
parse_options.exit.loopexit.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 1
bb1.i.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 2
bb90.i.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 3
codeRepl104.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 4
codeRepl113.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 5
codeRepl51.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 6
codeRepl70.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 7
codeRepl119.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 8
codeRepl93.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 9
codeRepl101.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 10
codeRepl120.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 11
codeRepl89.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 12
codeRepl45.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 13
codeRepl58.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 14
codeRepl46.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 15
codeRepl50.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 16
codeRepl52.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 17
codeRepl53.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 18
codeRepl61.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 19
codeRepl85.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 20
codeRepl97.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 21
codeRepl79.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 22
codeRepl102.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 23
codeRepl54.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 24
codeRepl57.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 25
codeRepl103.exitStub: ; preds = %_getopt_internal.exit.ce
ret i16 26
_getopt_internal.exit.ce: ; preds = %newFuncRoot
switch i32 %0, label %codeRepl127.exitStub [
i32 -1, label %parse_options.exit.loopexit.exitStub
i32 0, label %bb1.i.exitStub
i32 63, label %bb90.i.exitStub
i32 66, label %codeRepl104.exitStub
i32 67, label %codeRepl113.exitStub
i32 71, label %codeRepl51.exitStub
i32 77, label %codeRepl70.exitStub
i32 78, label %codeRepl119.exitStub
i32 80, label %codeRepl93.exitStub
i32 81, label %codeRepl101.exitStub
i32 82, label %codeRepl120.exitStub
i32 88, label %codeRepl89.exitStub
i32 97, label %codeRepl45.exitStub
i32 98, label %codeRepl58.exitStub
i32 99, label %codeRepl46.exitStub
i32 100, label %codeRepl50.exitStub
i32 104, label %codeRepl52.exitStub
i32 108, label %codeRepl53.exitStub
i32 109, label %codeRepl61.exitStub
i32 110, label %codeRepl85.exitStub
i32 111, label %codeRepl97.exitStub
i32 113, label %codeRepl79.exitStub
i32 114, label %codeRepl102.exitStub
i32 115, label %codeRepl54.exitStub
i32 116, label %codeRepl57.exitStub
i32 118, label %codeRepl103.exitStub
]
}