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      1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
      2 
      3 define i32 @extend2bit_v2(i32 %val) {
      4 entry:
      5   %0 = trunc i32 %val to i2                       ; <i2> [#uses=1]
      6   %1 = sext i2 %0 to i32                          ; <i32> [#uses=1]
      7   %2 = icmp eq i32 %1, 3                          ; <i1> [#uses=1]
      8   %3 = zext i1 %2 to i32                          ; <i32> [#uses=1]
      9   ret i32 %3
     10 }
     11 
     12 ; CHECK: extend2bit_v2:
     13 ; CHECK: xorl	%eax, %eax
     14 ; CHECK-NEXT: ret
     15