Fix PR8211

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118445 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 79c54295d2e8efd39599f253a52f3d8d0b878930..e4e92ccbf1462f035e2ff5edf490f79e95be8899 100644 (file)
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -5775,6 +5775,12 @@ def : Pat<(v4i32 (X86Movlps VR128:$src1, (load addr:$src2))),
 def : Pat<(X86Movlps VR128:$src1,
                     (bc_v4f32 (v2f64 (scalar_to_vector (loadf64 addr:$src2))))),
           (MOVLPSrm VR128:$src1, addr:$src2)>;
+// FIXME: Instead of a X86Movlps there should be a X86Movsd here, the problem
+// is during lowering, where it's not possible to recognize the load fold cause
+// it has two uses through a bitcast. One use disappears at isel time and the
+// fold opportunity reappears.
+def : Pat<(v4f32 (X86Movlps VR128:$src1, VR128:$src2)),
+          (MOVSDrr VR128:$src1, (EXTRACT_SUBREG (v4f32 VR128:$src2), sub_sd))>;
 
 // Shuffle with MOVLPD
 def : Pat<(v2f64 (X86Movlpd VR128:$src1, (load addr:$src2))),