xref: /llvm-project/llvm/test/CodeGen/X86/clear-bitfield.ll (revision 2f448bf509432c1a19ec46ab8cbc7353c03c6280)
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc < %s -mtriple=x86_64-- -combiner-reduce-load-op-store-width=false | FileCheck %s
3
4%struct.bit_fields = type { i32 }
5
6define void @clear_b1(ptr %ptr) {
7; CHECK-LABEL: clear_b1:
8; CHECK:       # %bb.0: # %entry
9; CHECK-NEXT:    andl $-2, (%rdi)
10; CHECK-NEXT:    retq
11entry:
12  %bf.load = load i32, ptr %ptr
13  %bf.clear = and i32 %bf.load, -2
14  store i32 %bf.clear, ptr %ptr
15  ret void
16}
17
18define void @clear16(ptr %ptr) {
19; CHECK-LABEL: clear16:
20; CHECK:       # %bb.0: # %entry
21; CHECK-NEXT:    andw $-2, (%rdi)
22; CHECK-NEXT:    retq
23entry:
24  %bf.load = load i16, ptr %ptr
25  %bf.clear = and i16 %bf.load, -2
26  store i16 %bf.clear, ptr %ptr
27  ret void
28}
29