[llvm] [RISCV] Only convert volatile i64 load/store to Zilsd in SelectionDAG. (PR #169529)

[Craig Topper via llvm-commits]

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@@ -213,10 +199,11 @@ define void @large_offset(ptr nocapture %p, i64 %d) nounwind {
 ; CHECK:       # %bb.0: # %entry
 ; CHECK-NEXT:    lui a1, 4
 ; CHECK-NEXT:    add a0, a0, a1
-; CHECK-NEXT:    ld a2, -384(a0)
+; CHECK-NEXT:    lw a2, -384(a0)
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topperc wrote:

This is a regression. x10 is already allocated. We pick x11 for the odd register first, but this can't pair since x10 is already used. So we pick x12 for the even but don't revisit the odd.

https://github.com/llvm/llvm-project/pull/169529