| ; 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 |
| } |
