diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 3dbedba7b9..a10f8a8daa 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -850,10 +850,15 @@ unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const { MVT X86TargetLowering::getOptimalMemOpType(uint64_t Size, unsigned Align, bool isSrcConst, bool isSrcStr) const { - if ((isSrcConst || isSrcStr) && Subtarget->hasSSE2() && Size >= 16) - return MVT::v4i32; - if ((isSrcConst || isSrcStr) && Subtarget->hasSSE1() && Size >= 16) - return MVT::v4f32; + // FIXME: This turns off use of xmm stores for memset/memcpy on targets like + // linux. This is because the stack realignment code can't handle certain + // cases like PR2962. This should be removed when PR2962 is fixed. + if (Subtarget->getStackAlignment() >= 16) { + if ((isSrcConst || isSrcStr) && Subtarget->hasSSE2() && Size >= 16) + return MVT::v4i32; + if ((isSrcConst || isSrcStr) && Subtarget->hasSSE1() && Size >= 16) + return MVT::v4f32; + } if (Subtarget->is64Bit() && Size >= 8) return MVT::i64; return MVT::i32; |