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| 1 | +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| 2 | +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=skylake-avx512 | FileCheck %s --check-prefix=CHECK-BMI2 |
| 3 | +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=x86-64-v4 | FileCheck %s --check-prefix=CHECK-BMI2 |
| 4 | +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefix=CHECK-BMI |
| 5 | + |
| 6 | +declare i32 @llvm.cttz.i32(i32, i1 immarg) |
| 7 | +define void @test_61038(ptr %tmp_buffer) { |
| 8 | +; CHECK-BMI2-LABEL: test_61038: |
| 9 | +; CHECK-BMI2: # %bb.0: # %entry |
| 10 | +; CHECK-BMI2-NEXT: tzcntl %eax, %eax |
| 11 | +; CHECK-BMI2-NEXT: movabsq $8589934591, %rcx # imm = 0x1FFFFFFFF |
| 12 | +; CHECK-BMI2-NEXT: movq $-1, %rdx |
| 13 | +; CHECK-BMI2-NEXT: btcq %rax, %rdx |
| 14 | +; CHECK-BMI2-NEXT: shrxq %rdx, %rcx, %rdx |
| 15 | +; CHECK-BMI2-NEXT: btcq %rax, %rcx |
| 16 | +; CHECK-BMI2-NEXT: xorl %eax, %eax |
| 17 | +; CHECK-BMI2-NEXT: cmpq $64, %rcx |
| 18 | +; CHECK-BMI2-NEXT: cmovael %eax, %edx |
| 19 | +; CHECK-BMI2-NEXT: movl %edx, (%rdi) |
| 20 | +; CHECK-BMI2-NEXT: retq |
| 21 | +; |
| 22 | +; CHECK-BMI-LABEL: test_61038: |
| 23 | +; CHECK-BMI: # %bb.0: # %entry |
| 24 | +; CHECK-BMI-NEXT: tzcntl %eax, %eax |
| 25 | +; CHECK-BMI-NEXT: movabsq $8589934591, %rdx # imm = 0x1FFFFFFFF |
| 26 | +; CHECK-BMI-NEXT: movq %rdx, %rsi |
| 27 | +; CHECK-BMI-NEXT: btcq %rax, %rsi |
| 28 | +; CHECK-BMI-NEXT: movq $-1, %rcx |
| 29 | +; CHECK-BMI-NEXT: btcq %rax, %rcx |
| 30 | +; CHECK-BMI-NEXT: # kill: def $cl killed $cl killed $rcx |
| 31 | +; CHECK-BMI-NEXT: shrq %cl, %rdx |
| 32 | +; CHECK-BMI-NEXT: xorl %eax, %eax |
| 33 | +; CHECK-BMI-NEXT: cmpq $64, %rsi |
| 34 | +; CHECK-BMI-NEXT: cmovael %eax, %edx |
| 35 | +; CHECK-BMI-NEXT: movl %edx, (%rdi) |
| 36 | +; CHECK-BMI-NEXT: retq |
| 37 | +entry: |
| 38 | + %0 = tail call i32 @llvm.cttz.i32(i32 poison, i1 false) |
| 39 | + %1 = zext i32 %0 to i64 |
| 40 | + %2 = shl nuw nsw i64 1, %1 |
| 41 | + %3 = xor i64 %2, 8589934591 |
| 42 | + %4 = icmp ugt i64 %3, 63 |
| 43 | + %x11.op.i = lshr i64 8589934591, %3 |
| 44 | + %5 = trunc i64 %x11.op.i to i32 |
| 45 | + %6 = select i1 %4, i32 0, i32 %5 |
| 46 | + store i32 %6, ptr %tmp_buffer, align 4 |
| 47 | + ret void |
| 48 | +} |
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