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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc -O0 -fast-isel -mtriple=x86_64-- < %s | FileCheck %s3 4define i32 @test(i64 %arg) nounwind {5; CHECK-LABEL: test:6; CHECK: # %bb.0: # %entry7; CHECK-NEXT: subq $1, %rdi8; CHECK-NEXT: setb %cl9; CHECK-NEXT: xorl %eax, %eax10; CHECK-NEXT: testb $1, %cl11; CHECK-NEXT: movl %eax, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill12; CHECK-NEXT: jne .LBB0_213; CHECK-NEXT: # %bb.1: # %no_overflow14; CHECK-NEXT: movl $1, %eax15; CHECK-NEXT: movl %eax, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill16; CHECK-NEXT: jmp .LBB0_217; CHECK-NEXT: .LBB0_2: # %merge18; CHECK-NEXT: movl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Reload19; CHECK-NEXT: retq20entry:21 %usubo = tail call { i64, i1 } @llvm.usub.with.overflow.i64(i64 %arg, i64 1)22 %overflow = extractvalue { i64, i1 } %usubo, 123 br i1 %overflow, label %merge, label %no_overflow24 25no_overflow:26 br label %merge27 28merge:29 %phi = phi i32 [ 1, %no_overflow ], [ 0, %entry ]30 ret i32 %phi31}32 33declare { i64, i1 } @llvm.usub.with.overflow.i64(i64, i64)34