maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

AMDGPU: Change stack alignment 

While the incoming stack for a kernel is 256-byte aligned,
this refers to the base address of the entire wave. This isn't
useful information for most of codegen. Fixes unnecessarily
aligning stack objects in callees.

llvm-svn: 300481
This commit is contained in:
Matt Arsenault 2017-04-17 19:48:24 +00:00
parent 7769a0854e
commit 869fec278c
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
llvm/lib/Target/AMDGPU/AMDGPUSubtarget.h
View File

@ -415,9 +415,11 @@ public:
return 0; return 0;
} }
// Scratch is allocated in 256 dword per wave blocks for the entire
// wavefront. When viewed from the perspecive of an arbitrary workitem, this
// is 4-byte aligned.
unsigned getStackAlignment() const { unsigned getStackAlignment() const {
// Scratch is allocated in 256 dword per wave blocks. return 4;
return 4 * 256 / getWavefrontSize();
} }
bool enableMachineScheduler() const override { bool enableMachineScheduler() const override {