| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s |
| |
| ; Make sure dagcombine doesn't eliminate the comparison due |
| ; to an off-by-one bug with computeKnownBits information. |
| |
| declare void @qux() |
| |
| define void @foo(i32 %a) { |
| ; CHECK-LABEL: foo: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: shrl $23, %edi |
| ; CHECK-NEXT: testl $256, %edi # imm = 0x100 |
| ; CHECK-NEXT: jne .LBB0_2 |
| ; CHECK-NEXT: # %bb.1: # %true |
| ; CHECK-NEXT: callq qux |
| ; CHECK-NEXT: .LBB0_2: # %false |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: retq |
| %t0 = lshr i32 %a, 23 |
| br label %next |
| next: |
| %t1 = and i32 %t0, 256 |
| %t2 = icmp eq i32 %t1, 0 |
| br i1 %t2, label %true, label %false |
| true: |
| call void @qux() |
| ret void |
| false: |
| ret void |
| } |
| |
