[llvm] [Mips] mips1 DivByZeroTrap (PR #81311)

[YunQiang Su via llvm-commits]

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@@ -206,12 +234,30 @@ entry:
 }
 
 define signext i32 @sdiv_i32(i32 signext %a, i32 signext %b) {
-; GP32-LABEL: sdiv_i32:
-; GP32:       # %bb.0: # %entry
-; GP32-NEXT:    div $zero, $4, $5
-; GP32-NEXT:    teq $5, $zero, 7
-; GP32-NEXT:    jr $ra
-; GP32-NEXT:    mflo $2
+; GP32R0R1-LABEL: sdiv_i32:
+; GP32R0R1:       # %bb.0: # %entry
+; GP32R0R1-NEXT:    div $zero, $4, $5
+; GP32R0R1-NEXT:    bnez $5, $BB3_2
+; GP32R0R1-NEXT:    nop
+; GP32R0R1-NEXT:  # %bb.1: # %entry
+; GP32R0R1-NEXT:    break 0, 7
+; GP32R0R1-NEXT:  $BB3_2: # %entry
+; GP32R0R1-NEXT:    jr $ra
+; GP32R0R1-NEXT:    mflo $2
+;
+; GP32R0R2-LABEL: sdiv_i32:
+; GP32R0R2:       # %bb.0: # %entry
+; GP32R0R2-NEXT:    div $zero, $4, $5
+; GP32R0R2-NEXT:    teq $5, $zero, 7
+; GP32R0R2-NEXT:    jr $ra
+; GP32R0R2-NEXT:    mflo $2
+;
+; GP32R2R5-LABEL: sdiv_i32:
+; GP32R2R5:       # %bb.0: # %entry
+; GP32R2R5-NEXT:    div $zero, $4, $5
+; GP32R2R5-NEXT:    teq $5, $zero, 7
+; GP32R2R5-NEXT:    jr $ra
+; GP32R2R5-NEXT:    mflo $2
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wzssyqa wrote:

R0R2 is same with R2R5?
If so, why not merge them?

https://github.com/llvm/llvm-project/pull/81311