1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 3; Check the attribute. 4 5; RUN: llc < %s -mtriple=x86_64-- -mattr=-sbb-dep-breaking | FileCheck %s --check-prefixes=ZERO 6; RUN: llc < %s -mtriple=x86_64-- -mattr=+sbb-dep-breaking | FileCheck %s --check-prefixes=IDIOM 7 8; And check that CPUs have included the attribute as expected. 9 10; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s --check-prefixes=ZERO 11; RUN: llc < %s -mtriple=x86_64-- -mcpu=sandybridge | FileCheck %s --check-prefixes=ZERO 12; RUN: llc < %s -mtriple=x86_64-- -mcpu=skylake | FileCheck %s --check-prefixes=ZERO 13; RUN: llc < %s -mtriple=x86_64-- -mcpu=k8 | FileCheck %s --check-prefixes=IDIOM 14; RUN: llc < %s -mtriple=x86_64-- -mcpu=btver1 | FileCheck %s --check-prefixes=IDIOM 15; RUN: llc < %s -mtriple=x86_64-- -mcpu=bdver2 | FileCheck %s --check-prefixes=IDIOM 16; RUN: llc < %s -mtriple=x86_64-- -mcpu=znver3 | FileCheck %s --check-prefixes=IDIOM 17 18define i32 @i32_select_0_or_neg1(i32 %x) { 19; ZERO-LABEL: i32_select_0_or_neg1: 20; ZERO: # %bb.0: 21; ZERO-NEXT: xorl %eax, %eax 22; ZERO-NEXT: negl %edi 23; ZERO-NEXT: sbbl %eax, %eax 24; ZERO-NEXT: retq 25; 26; IDIOM-LABEL: i32_select_0_or_neg1: 27; IDIOM: # %bb.0: 28; IDIOM-NEXT: negl %edi 29; IDIOM-NEXT: sbbl %eax, %eax 30; IDIOM-NEXT: retq 31 %cmp = icmp ne i32 %x, 0 32 %sel = select i1 %cmp, i32 -1, i32 0 33 ret i32 %sel 34} 35