Commit Graph

15 Commits

Author SHA1 Message Date
dongAxis 1fd7dc4074 When dumping results of StackLifetime, it will print the following
log:

BB  [7, 8): begin {}, end {}, livein {}, liveout {}
BB  [1, 2): begin {}, end {}, livein {}, liveout {}
...

But it is not convenient to know what the basic block is.
So I add the basic block name to it.

Reviewed By: vitalybuka
TestPlan: check-llvm
Differential Revision: https://reviews.llvm.org/D87152
2020-09-07 11:43:16 +08:00
Vitaly Buka a40660551e [StackSafety] Ignore allocas with partial lifetime markers
Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D86672
2020-08-27 13:54:41 -07:00
Vitaly Buka e10e7829bf [StackSafety] Skip ambiguous lifetime analysis
If we can't identify alloca used in lifetime marker we
need to assume to worst case scenario.

Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D84630
2020-08-16 18:05:52 -07:00
Vitaly Buka 7547508b7a Revert "[StackSafety] Skip ambiguous lifetime analysis"
This reverts commit 0b2616a804.

Crashes with safe-stack.
2020-08-07 14:02:50 -07:00
Vitaly Buka 0b2616a804 [StackSafety] Skip ambiguous lifetime analysis
If we can't identify alloca used in lifetime marker we
need to assume to worst case scenario.

Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D84630
2020-08-06 19:10:33 -07:00
Vitaly Buka 3d8149db3c [StackSafety,NFC] Don't rerun on LiveIn change 2020-06-19 21:29:31 -07:00
Vitaly Buka 0e1bdeafc9 [StackSafety,NFC] Fix comment 2020-06-19 03:11:13 -07:00
Vitaly Buka f224f3d0f2 [StackSafety] Add StackLifetime::isAliveAfter
This function is going to be added into StackSafety checks.
This patch uses function in ::print implementation to make sure
that it works as expected.
2020-06-19 02:32:17 -07:00
Vitaly Buka 306c257b00 [SafeStack,NFC] Print liveness for all instrunctions 2020-06-19 02:32:17 -07:00
Vitaly Buka 20b1094a04 [StackSafety,NFC] Replace map with vector
We don't need to lookup InstructionNumbering by number, so
we can use vector with index as assigned number.
2020-06-19 02:32:17 -07:00
Vitaly Buka 7b27c09f63 [StackSafety,NFC] Don't test terminators
Code does not track terminators and do not expose them through interface.
State there is just a state of the last instruction or entry.
So this information is just redundant and doesn't need to be tested.
2020-06-19 02:32:17 -07:00
Vitaly Buka fcd67665a8 [StackSafety] Add "Must Live" logic
Summary:
Extend StackLifetime with option to calculate liveliness
where alloca is only considered alive on basic block entry
if all non-dead predecessors had it alive at terminators.

Depends on D82043.

Reviewers: eugenis

Reviewed By: eugenis

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82124
2020-06-18 16:53:37 -07:00
Vitaly Buka f672791e08 [StackSafety] Add pass for StackLifetime testing
Summary: lifetime.ll is a copy of SafeStack/X86/coloring2.ll

Reviewers: eugenis

Reviewed By: eugenis

Subscribers: hiraditya, mgrang, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82043
2020-06-18 16:34:18 -07:00
Vitaly Buka d812efb121 [SafeStack,NFC] Fix names after files move
Summary: Depends on D81831.

Reviewers: eugenis, pcc

Reviewed By: eugenis

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81832
2020-06-17 01:08:40 -07:00
Vitaly Buka 6754a0e2ed [SafeStack,NFC] Move SafeStackColoring code
Summary:
This code is going to be used in StackSafety.
This patch is file move with minimal changes. Identifiers
will be fixed in the followup patch.

Reviewers: eugenis, pcc

Reviewed By: eugenis

Subscribers: mgorny, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81831
2020-06-17 01:07:47 -07:00