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| author | luxufan <luxufan@iscas.ac.cn> | 2023-06-10 15:48:46 +0800 |
|---|---|---|
| committer | luxufanxport https_proxy=http://127.0.0.1:1080 <luxufan@iscas.ac.cn> | 2023-06-10 15:48:46 +0800 |
| commit | 25d9fde22e609f8637f720220810429745707b76 (patch) | |
| tree | f438ffdfcf4738a2817ee9bf644001e71e488542 /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | 3abdd401292d5404636669ee5f970445265d42a5 (diff) | |
[SCCP] Skip computing intrinsics if one of its args is unknownOrUndef
For constant range supported intrinsics, we got consantrange from args
no matter if they are unknown or undef. And the constant range computed
from unknown or undef value state is full range.
I think compute with full constant range is harmful since although we
can do mergeIn after these args value state are changed, the merge
operation of two constant ranges is union.
Reviewed By: nikic
Differential Revision: https://reviews.llvm.org/D152499
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
0 files changed, 0 insertions, 0 deletions