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