[llvm] [RISCV] Enable rematerialization for scalar loads (PR #166774)

[Craig Topper via llvm-commits]

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@@ -201,3 +201,95 @@ for.end:                                          ; preds = %for.inc, %entry
 }
 
 declare i32 @foo(i32, i32, i32, i32, i32, i32)
+
+define i32 @remat_ld(i32 %0, i32 %1, i32 %2, i32 %3, i32 %4, i32 %5, i32 %6, i32 %7, i32 %stack0, i32 %stack1, ptr %p, ptr %q) {
+; RV32I-LABEL: remat_ld:
+; RV32I:       # %bb.0: # %entry
+; RV32I-NEXT:    addi sp, sp, -64
+; RV32I-NEXT:    .cfi_def_cfa_offset 64
+; RV32I-NEXT:    sw ra, 60(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s0, 56(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s1, 52(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s2, 48(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s3, 44(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s4, 40(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s5, 36(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s6, 32(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s7, 28(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s8, 24(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s9, 20(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s10, 16(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    sw s11, 12(sp) # 4-byte Folded Spill
+; RV32I-NEXT:    .cfi_offset ra, -4
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topperc wrote:

nounwind?

https://github.com/llvm/llvm-project/pull/166774