[X86] New blsr test cases

[GBuella]

Summary

https://reviews.llvm.org/D57296 is based on this.

[craig.topper]

LGTM

llvm/test/CodeGen/X86/bmi.ll

   br i1 %4, label %5, label %6
 
   tail call void @bar()
   br label %6
 
   ret void
 }
 
+define i32 @blsr32_branch(i32 %x) {
+; X86-LABEL: blsr32_branch:
+; X86:       # %bb.0:
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    .cfi_def_cfa_offset 8
+; X86-NEXT:    .cfi_offset %esi, -8
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    leal -1(%eax), %esi
+; X86-NEXT:    andl %eax, %esi
+; X86-NEXT:    jne .LBB46_2
+; X86-NEXT:  # %bb.1:
+; X86-NEXT:    calll bar
+; X86-NEXT:  .LBB46_2:
+; X86-NEXT:    movl %esi, %eax
+; X86-NEXT:    popl %esi
+; X86-NEXT:    .cfi_def_cfa_offset 4
+; X86-NEXT:    retl
+;
+; X64-LABEL: blsr32_branch:
+; X64:       # %bb.0:
+; X64-NEXT:    pushq %rbx
+; X64-NEXT:    .cfi_def_cfa_offset 16
+; X64-NEXT:    .cfi_offset %rbx, -16
+; X64-NEXT:    # kill: def $edi killed $edi def $rdi
+; X64-NEXT:    leal -1(%rdi), %ebx
+; X64-NEXT:    andl %edi, %ebx
+; X64-NEXT:    jne .LBB46_2
+; X64-NEXT:  # %bb.1:
+; X64-NEXT:    callq bar
+; X64-NEXT:  .LBB46_2:
+; X64-NEXT:    movl %ebx, %eax
+; X64-NEXT:    popq %rbx
+; X64-NEXT:    .cfi_def_cfa_offset 8
+; X64-NEXT:    retq
+  %tmp = sub i32 %x, 1
+  %tmp2 = and i32 %x, %tmp
+  %cmp = icmp eq i32 %tmp2, 0
+  br i1 %cmp, label %1, label %2
+
+  tail call void @bar()
+  br label %2
+  ret i32 %tmp2
+}
+
+define i64 @blsr64_branch(i64 %x) {
+; X86-LABEL: blsr64_branch:
+; X86:       # %bb.0:
+; X86-NEXT:    pushl %edi
+; X86-NEXT:    .cfi_def_cfa_offset 8
+; X86-NEXT:    pushl %esi
+; X86-NEXT:    .cfi_def_cfa_offset 12
+; X86-NEXT:    .cfi_offset %esi, -12
+; X86-NEXT:    .cfi_offset %edi, -8
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    movl %eax, %esi
+; X86-NEXT:    addl $-1, %esi
+; X86-NEXT:    movl %ecx, %edi
+; X86-NEXT:    adcl $-1, %edi
+; X86-NEXT:    andl %eax, %esi
+; X86-NEXT:    andl %ecx, %edi
+; X86-NEXT:    movl %esi, %eax
+; X86-NEXT:    orl %edi, %eax
+; X86-NEXT:    jne .LBB47_2
+; X86-NEXT:  # %bb.1:
+; X86-NEXT:    calll bar
+; X86-NEXT:  .LBB47_2:
+; X86-NEXT:    movl %esi, %eax
+; X86-NEXT:    movl %edi, %edx
+; X86-NEXT:    popl %esi
+; X86-NEXT:    .cfi_def_cfa_offset 8
+; X86-NEXT:    popl %edi
+; X86-NEXT:    .cfi_def_cfa_offset 4
+; X86-NEXT:    retl
+;
+; X64-LABEL: blsr64_branch:
+; X64:       # %bb.0:
+; X64-NEXT:    pushq %rbx
+; X64-NEXT:    .cfi_def_cfa_offset 16
+; X64-NEXT:    .cfi_offset %rbx, -16
+; X64-NEXT:    leaq -1(%rdi), %rbx
+; X64-NEXT:    andq %rdi, %rbx
+; X64-NEXT:    jne .LBB47_2
+; X64-NEXT:  # %bb.1:
+; X64-NEXT:    callq bar
+; X64-NEXT:  .LBB47_2:
+; X64-NEXT:    movq %rbx, %rax
+; X64-NEXT:    popq %rbx
+; X64-NEXT:    .cfi_def_cfa_offset 8
+; X64-NEXT:    retq
+  %tmp = sub i64 %x, 1
+  %tmp2 = and i64 %x, %tmp
+  %cmp = icmp eq i64 %tmp2, 0
+  br i1 %cmp, label %1, label %2
+
+  tail call void @bar()
+  br label %2
+  ret i64 %tmp2
+}
+
 declare void @bar()