Unverified Commit 4306cfd4 authored by Jim Lin's avatar Jim Lin Committed by GitHub
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[RISCV] Fix using undefined variable %pt2 in mask-reg-alloc.mir testcase (#70764) 

First PseudoVMERGE_VIM_M1 should use %pt1 as its operand instead of
%pt2.

I found this error when I add LiveIntervals analysis pass in my
downstream. And it crashes with the message:

```
Use of %7 does not have a corresponding definition on every path:
112r %6:vrnov0 = PseudoVMERGE_VIM_M1 %pt2:vrnov0(tied-def 0), %2:vr, 1, %4:vmv0, 1, 3
LLVM ERROR: Use not jointly dominated by defs.
```
parent df1e3948

llvm/test/CodeGen/RISCV/rvv/mask-reg-alloc.mir

+1 −1
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ body: | 
    %3:vr = COPY $v3

    %4:vmv0 = COPY %0

    %pt1:vrnov0 = IMPLICIT_DEF

    %5:vrnov0 = PseudoVMERGE_VIM_M1 %pt2, killed %2, 1, %4, 1, 3

    %5:vrnov0 = PseudoVMERGE_VIM_M1 %pt1, killed %2, 1, %4, 1, 3

    %6:vmv0 = COPY %1

    %pt2:vrnov0 = IMPLICIT_DEF

    %7:vrnov0 = PseudoVMERGE_VIM_M1 %pt2, killed %3, 1, %6, 1, 3