https://llvm.org/bugs/show_bug.cgi?id=23632
Bug ID: 23632
Summary: llc optimises unaligned intrinsic to aligned load
Product: tools
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: llc
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 14370
--> https://llvm.org/bugs/attachment.cgi?id=14370&action=edit
Reproducer.
@llvm.x86.avx512.mask.compress.store.d.512 with -1 mask is optimized to
vmovdqa32 (i.e. aligned move), which seems to be incorrect, as alignment is
unknown in general case.
Compile: llc -mcpu=knl repr.ll
clang++ -march=knl main.cpp repr.s
Run: sde -knl -- ./a.out
llc -version
LLVM (http://llvm.org/):
LLVM version 3.7.0svn
Optimized build with assertions.
Built May 21 2015 (15:01:04).
Default target: x86_64-unknown-linux-gnu
Host CPU: sandybridge
clang version 3.7.0 (trunk 237892)
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