1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=-bmi < %s | FileCheck %s --check-prefix=CHECK-NOBMI 3; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi < %s | FileCheck %s --check-prefix=CHECK-BMI 4 5; Optimize (x > -1) to (x >= 0) etc. 6; Optimize (cmp (add / sub), 0): eliminate the subs used to update flag 7; for comparison only 8; rdar://10233472 9 10define i32 @t1(i64 %a) { 11; CHECK-NOBMI-LABEL: t1: 12; CHECK-NOBMI: # %bb.0: 13; CHECK-NOBMI-NEXT: xorl %eax, %eax 14; CHECK-NOBMI-NEXT: testq %rdi, %rdi 15; CHECK-NOBMI-NEXT: setns %al 16; CHECK-NOBMI-NEXT: retq 17; 18; CHECK-BMI-LABEL: t1: 19; CHECK-BMI: # %bb.0: 20; CHECK-BMI-NEXT: xorl %eax, %eax 21; CHECK-BMI-NEXT: testq %rdi, %rdi 22; CHECK-BMI-NEXT: setns %al 23; CHECK-BMI-NEXT: retq 24 %cmp = icmp sgt i64 %a, -1 25 %conv = zext i1 %cmp to i32 26 ret i32 %conv 27} 28