https://bugs.llvm.org/show_bug.cgi?id=41837
Bug ID: 41837
Summary: X86FastISel::X86FastEmitLoad - unsafe NT vector load
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: llvm-...@redking.me.uk
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, spatel+l...@rotateright.com
For V4f32/v2f64 we only attempt NT loads when SSE41 is enabled:
case MVT::v4f32:
if (IsNonTemporal && Alignment >= 16 && HasSSE41)
Opc = HasVLX ? X86::VMOVNTDQAZ128rm :
HasAVX ? X86::VMOVNTDQArm : X86::MOVNTDQArm;
else if (Alignment >= 16)
Opc = HasVLX ? X86::VMOVAPSZ128rm :
HasAVX ? X86::VMOVAPSrm : X86::MOVAPSrm;
else
Opc = HasVLX ? X86::VMOVUPSZ128rm :
HasAVX ? X86::VMOVUPSrm : X86::MOVUPSrm;
RC = HasVLX ? &X86::VR128XRegClass : &X86::VR128RegClass;
break;
But this limit appears to be missing for 128-bit integer vectors:
case MVT::v4i32:
case MVT::v2i64:
case MVT::v8i16:
case MVT::v16i8:
if (IsNonTemporal && Alignment >= 16)
Opc = HasVLX ? X86::VMOVNTDQAZ128rm :
HasAVX ? X86::VMOVNTDQArm : X86::MOVNTDQArm;
else if (Alignment >= 16)
Opc = HasVLX ? X86::VMOVDQA64Z128rm :
HasAVX ? X86::VMOVDQArm : X86::MOVDQArm;
else
Opc = HasVLX ? X86::VMOVDQU64Z128rm :
HasAVX ? X86::VMOVDQUrm : X86::MOVDQUrm;
RC = HasVLX ? &X86::VR128XRegClass : &X86::VR128RegClass;
break;
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
