| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=skylake-avx512 | FileCheck %s --check-prefix=CHECK-BMI2 |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64-v4 | FileCheck %s --check-prefix=CHECK-BMI2 |
| ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefix=CHECK-BMI |
| |
| declare i32 @llvm.cttz.i32(i32, i1 immarg) |
| define void @test_61038(ptr %tmp_buffer) { |
| ; CHECK-BMI2-LABEL: test_61038: |
| ; CHECK-BMI2: # %bb.0: # %entry |
| ; CHECK-BMI2-NEXT: tzcntl %eax, %eax |
| ; CHECK-BMI2-NEXT: movabsq $8589934591, %rcx # imm = 0x1FFFFFFFF |
| ; CHECK-BMI2-NEXT: movq %rcx, %rdx |
| ; CHECK-BMI2-NEXT: btcq %rax, %rdx |
| ; CHECK-BMI2-NEXT: xorl %eax, %eax |
| ; CHECK-BMI2-NEXT: cmpq $64, %rdx |
| ; CHECK-BMI2-NEXT: shrxq %rdx, %rcx, %rcx |
| ; CHECK-BMI2-NEXT: cmovael %eax, %ecx |
| ; CHECK-BMI2-NEXT: movl %ecx, (%rdi) |
| ; CHECK-BMI2-NEXT: retq |
| ; |
| ; CHECK-BMI-LABEL: test_61038: |
| ; CHECK-BMI: # %bb.0: # %entry |
| ; CHECK-BMI-NEXT: tzcntl %eax, %eax |
| ; CHECK-BMI-NEXT: movabsq $8589934591, %rdx # imm = 0x1FFFFFFFF |
| ; CHECK-BMI-NEXT: movq %rdx, %rcx |
| ; CHECK-BMI-NEXT: btcq %rax, %rcx |
| ; CHECK-BMI-NEXT: shrq %cl, %rdx |
| ; CHECK-BMI-NEXT: xorl %eax, %eax |
| ; CHECK-BMI-NEXT: cmpq $64, %rcx |
| ; CHECK-BMI-NEXT: cmovael %eax, %edx |
| ; CHECK-BMI-NEXT: movl %edx, (%rdi) |
| ; CHECK-BMI-NEXT: retq |
| entry: |
| %0 = tail call i32 @llvm.cttz.i32(i32 poison, i1 false) |
| %1 = zext i32 %0 to i64 |
| %2 = shl nuw nsw i64 1, %1 |
| %3 = xor i64 %2, 8589934591 |
| %4 = icmp ugt i64 %3, 63 |
| %x11.op.i = lshr i64 8589934591, %3 |
| %5 = trunc i64 %x11.op.i to i32 |
| %6 = select i1 %4, i32 0, i32 %5 |
| store i32 %6, ptr %tmp_buffer, align 4 |
| ret void |
| } |