| commit | f41b0c1dff55d2d8c30f95dada248bb3e2e8c5cf | |
| author | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | |
| Fri, 23 Feb 2018 23:08:34 +0000 (23 23:08 +0000) | ||
| committer | Nemanja Ivanovic <nemanja.i.ibm@gmail.com> | |
| Fri, 23 Feb 2018 23:08:34 +0000 (23 23:08 +0000) | ||
| tree | 208e2836965a64192da0ba1c4abbe622de5de815 | treesnapshot (tar.gz zip) |
| parent | 3d238821f125366a4142f79f441db29b800a6b93 | commitdiff |
[PowerPC] Disable shrink-wrapping when getting PC address through the LR
The instruction sequence used to get the address of the PC into a GPR requires
that we clobber the link register. Doing so without having first saved it in
the prologue leaves the function unable to return. Currently, this sequence is
emitted into the entry block. To ensure the prologue is inserted before this
sequence, disable shrink-wrapping.
This fixes PR33547.
Differential Revision: https://reviews.llvm.org/D43677
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325972 91177308-0d34-0410-b5e6-96231b3b80d8
The instruction sequence used to get the address of the PC into a GPR requires
that we clobber the link register. Doing so without having first saved it in
the prologue leaves the function unable to return. Currently, this sequence is
emitted into the entry block. To ensure the prologue is inserted before this
sequence, disable shrink-wrapping.
This fixes PR33547.
Differential Revision: https://reviews.llvm.org/D43677
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325972 91177308-0d34-0410-b5e6-96231b3b80d8