llvm-project

Commit Graph

Author	SHA1	Message	Date
Rahman Lavaee	616ac1b961	[llvm-readobj] Print function names with `--bb-addr-map`. This patch uses the `getSymbolIndexForFunctionAddress` helper function to print function names for BB address map entries. Reviewed By: jhenderson Differential Revision: https://reviews.llvm.org/D102900	2021-06-01 18:40:42 -07:00
Rahman Lavaee	949abf7d6a	[llvm-readelf, propeller] Add fallthrough bit to basic block metadata in BB-Address-Map section. This patch adds a fallthrough bit to basic block metadata, indicating whether the basic block can fallthrough without taking any branches. The bit will help us avoid an intel LBR bug which results in occasional duplicate entries at the beginning of the LBR stack. This patch uses `MachineBasicBlock::canFallThrough()` to set the bit. This is not a const method because it eventually calls `TargetInstrInfo::analyzeBranch`, but it calls this function with the default `AllowModify=false`. So we can either make the argument to the `getBBAddrMapMetadata` non-const, or we can use `const_cast` when calling `canFallThrough`. I decide to go with the latter since this is purely due to legacy code, and in general we should not allow the BasicBlock to be mutable during `getBBAddrMapMetadata`. Reviewed By: tmsriram Differential Revision: https://reviews.llvm.org/D96918	2021-03-22 21:38:05 -07:00
Rahman Lavaee	c245c21c43	[llvm-readelf] Support dumping the BB address map section with --bb-addr-map. This patch lets llvm-readelf dump the content of the BB address map section in the following format: ``` Function { At: <address> BB entries [ { Offset: <offset> Size: <size> Metadata: <metadata> }, ... ] } ... ``` Reviewed By: jhenderson Differential Revision: https://reviews.llvm.org/D95511	2021-03-08 16:20:11 -08:00

Author

SHA1

Message

Date

Rahman Lavaee

616ac1b961

[llvm-readobj] Print function names with `--bb-addr-map`.

This patch uses the `getSymbolIndexForFunctionAddress` helper function to print function names for BB address map entries.

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D102900

2021-06-01 18:40:42 -07:00

Rahman Lavaee

949abf7d6a

[llvm-readelf, propeller] Add fallthrough bit to basic block metadata in BB-Address-Map section.

This patch adds a fallthrough bit to basic block metadata, indicating whether the basic block can fallthrough without taking any branches. The bit will help us avoid an intel LBR bug which results in occasional duplicate entries at the beginning of the LBR stack.

This patch uses `MachineBasicBlock::canFallThrough()` to set the bit. This is not a const method because it eventually calls `TargetInstrInfo::analyzeBranch`, but it calls this function with the default `AllowModify=false`. So we can either make the argument to the `getBBAddrMapMetadata` non-const, or we can use `const_cast` when calling `canFallThrough`. I decide to go with the latter since this is purely due to legacy code, and in general we should not allow the BasicBlock to be mutable during `getBBAddrMapMetadata`.

Reviewed By: tmsriram

Differential Revision: https://reviews.llvm.org/D96918

2021-03-22 21:38:05 -07:00

Rahman Lavaee

c245c21c43

[llvm-readelf] Support dumping the BB address map section with --bb-addr-map.

This patch lets llvm-readelf dump the content of the BB address map
section in the following format:
```
Function {
  At: <address>
  BB entries [
    {
      Offset:   <offset>
      Size:     <size>
      Metadata: <metadata>
    },
    ...
  ]
}
...
```

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D95511

2021-03-08 16:20:11 -08:00

3 Commits