When generating XCOFF, the compiler generates a csect with an internal
name. Each function results in a label within the csect. This patch
replaces the internal name ".text" with an empty string "". This avoids
adding special code to handle a function text() in the source file, and
works better with some XCOFF tools that are confused when the csect and
the first function have the same address.
Reviewed By: hubert.reinterpretcast
Differential Revision: https://reviews.llvm.org/D154854
Summary: The FixupOffsetInCsect should be 0 for R_REF relocation since it specifies a nonrelocating reference. Otherwise liker would try to relocate the symbol through its address and an error like following occurred.
```
ld: 0711-547 SEVERE ERROR: Object /tmp/1-2a7ea1.o cannot be processed.
RLD address 0x65 for section 2 (.data) is
not contained in the section.
```
Reviewed By: shchenz
Differential Revision: https://reviews.llvm.org/D152777
Summary: A R_REF relocation as a non-relocating reference is required to prevent garbage collection (by the binder) of the ref symbol in object generation.
Reviewed By: shchenz
Differential Revision: https://reviews.llvm.org/D144356
The LIT test cases were migrated with the script provided by
Nikita Popov. Due to the size of the change it is split into
several parts.
Reviewed By: nemanja, nikic
Differential Revision: https://reviews.llvm.org/D135474
For PGO on AIX, when we switch to the linux-style PGO variable access
(via _start and _stop labels), we need the compiler to generate a .ref
assembly for each of the three csects:
- __llvm_prf_data[RW]
- __llvm_prf_names[RO]
- __llvm_prf_vnds[RW]
We insert the .ref inside the __llvm_prf_cnts[RW] csect so that if it's
live then the 3 csects are live.
For example, for a testcase with at least one function definition, when
compiled with -fprofile-generate we should generate:
.csect __llvm_prf_cnts[RW],3
.ref __llvm_prf_data[RW] <<============ needs to be inserted
.ref __llvm_prf_names[RO] <<===========
the __llvm_prf_vnds is not always present, so we reference it only when
it's present.
Reviewed By: sfertile, daltenty
Differential Revision: https://reviews.llvm.org/D116607
