; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s ; The and with -9 has multiple users which prevents ; SimplifyDemandedBits from touching it. The truncate only ; demands the lower 8 bits. X86ISelDAGToDAG.cpp wants form ; a test instruction from the icmp+trunc+and, but needs to ; mask the -9 to 8 bits since SimplifyDemandedBits didn't. define i32 @foo(i16 signext %0, i32 %1, ptr nocapture %2) { ; CHECK-LABEL: foo: ; CHECK: # %bb.0: ; CHECK-NEXT: incl %edi ; CHECK-NEXT: andl $65527, %edi # imm = 0xFFF7 ; CHECK-NEXT: movl %edi, (%rdx) ; CHECK-NEXT: xorl %eax, %eax ; CHECK-NEXT: testb %dil, %dil ; CHECK-NEXT: cmovel %esi, %eax ; CHECK-NEXT: retq %4 = add i16 %0, 1 %5 = and i16 %4, -9 %6 = zext i16 %5 to i32 store i32 %6, ptr %2, align 4 %7 = trunc i16 %5 to i8 %8 = icmp eq i8 %7, 0 %9 = select i1 %8, i32 %1, i32 0 ret i32 %9 }