Manman Ren
222d6192ad
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp
...
and a conditional branch; also when removing dead cases from a switch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164084 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-18 00:47:33 +00:00
Manman Ren
b010277b59
PGO: preserve branch-weight metadata when simplifying Switch
...
Hanlde the case when we split the default edge if the default target has "icmp"
and unconditinal branch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164076 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-17 23:07:43 +00:00
Manman Ren
b11cbe6b23
PGO: preserve branch-weight metadata when simplifying SwitchOnSelect.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164068 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-17 22:28:55 +00:00
Manman Ren
566540332f
PGO: preserve branch-weight metadata when simplifying two branches with a common
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destination in SimplifyCondBranchToCondBranch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164054 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-17 21:30:40 +00:00
Manman Ren
062986c2f0
PGO: preserve branch-weight metadata when simplifying two branches with a common
...
destination.
Updated previous implementation to fix a case not covered:
// PBI: br i1 %x, TrueDest, BB
// BI: br i1 %y, TrueDest, FalseDest
The other case was handled correctly.
// PBI: br i1 %x, BB, FalseDest
// BI: br i1 %y, TrueDest, FalseDest
Also tried to use 64-bit arithmetic instead of APInt with scale to simplify the
computation. Let me know if you have other opinions about this.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163954 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-15 00:39:57 +00:00
Manman Ren
ad2890760f
PGO: preserve branch-weight metadata when simplifying a switch with a single
...
case to a conditional branch and when removing dead cases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163942 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-14 21:53:06 +00:00
Manman Ren
ee99c7f1bf
PGO: preserve branch-weight metadata when removing a case which jumps
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to the default target.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163724 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-12 17:04:11 +00:00
Benjamin Kramer
44aac553f6
FileCheck hygiene.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147580 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-05 00:43:34 +00:00
Nick Lewycky
06cc66f65a
Teach simplifycfg to recompute branch weights when merging some branches, and
...
to discard weights when appropriate. Still more to do (and a new TODO), but
it's a start!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147286 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-27 04:31:52 +00:00
Nick Lewycky
c9a1aed7fe
Update the branch weight metadata when reversing the order of a branch.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147280 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-26 20:54:14 +00:00
