llvm-project/llvm/test/CodeGen/X86/cmov.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -verify-machineinstrs -mtriple=x86_64-unknown-unknown -disable-cgp-select2branch -x86-cmov-converter=false | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"

define i32 @test1(i32 %x, i32 %n, i32 %w, i32* %vp) nounwind readnone {
; CHECK-LABEL: test1:
; CHECK:       # BB#0: # %entry
; CHECK-NEXT:    btl %esi, %edi
; CHECK-NEXT:    movl $12, %eax
; CHECK-NEXT:    cmovael (%rcx), %eax
; CHECK-NEXT:    retq
entry:
	%0 = lshr i32 %x, %n
	%1 = and i32 %0, 1
	%toBool = icmp eq i32 %1, 0
        %v = load i32, i32* %vp
	%.0 = select i1 %toBool, i32 %v, i32 12
	ret i32 %.0
}

define i32 @test2(i32 %x, i32 %n, i32 %w, i32* %vp) nounwind readnone {
; CHECK-LABEL: test2:
; CHECK:       # BB#0: # %entry
; CHECK-NEXT:    btl %esi, %edi
; CHECK-NEXT:    movl $12, %eax
; CHECK-NEXT:    cmovbl (%rcx), %eax
; CHECK-NEXT:    retq
entry:
	%0 = lshr i32 %x, %n
	%1 = and i32 %0, 1
	%toBool = icmp eq i32 %1, 0
        %v = load i32, i32* %vp
	%.0 = select i1 %toBool, i32 12, i32 %v
	ret i32 %.0
}


; x86's 32-bit cmov zeroes the high 32 bits of the destination. Make
; sure CodeGen takes advantage of that to avoid an unnecessary
; zero-extend (movl) after the cmov.

declare void @bar(i64) nounwind

define void @test3(i64 %a, i64 %b, i1 %p) nounwind {
; CHECK-LABEL: test3:
; CHECK:       # BB#0:
; CHECK-NEXT:    pushq %rax
; CHECK-NEXT:    testb $1, %dl
; CHECK-NEXT:    cmovel %esi, %edi
; CHECK-NEXT:    callq bar
; CHECK-NEXT:    popq %rax
; CHECK-NEXT:    retq
  %c = trunc i64 %a to i32
  %d = trunc i64 %b to i32
  %e = select i1 %p, i32 %c, i32 %d
  %f = zext i32 %e to i64
  call void @bar(i64 %f)
  ret void
}



; CodeGen shouldn't try to do a setne after an expanded 8-bit conditional
; move without recomputing EFLAGS, because the expansion of the conditional
; move with control flow may clobber EFLAGS (e.g., with xor, to set the
; register to zero).

; The test is a little awkward; the important part is that there's a test before the
; setne.
; PR4814


@g_3 = external global i8
@g_96 = external global i8
@g_100 = external global i8
@_2E_str = external constant [15 x i8], align 1

define i1 @test4() nounwind {
; CHECK-LABEL: test4:
; CHECK:       # BB#0: # %entry
; CHECK-NEXT:    movsbl {{.*}}(%rip), %edx
; CHECK-NEXT:    movl %edx, %eax
; CHECK-NEXT:    shrb $7, %al
; CHECK-NEXT:    movzbl %al, %ecx
; CHECK-NEXT:    xorl $1, %ecx
; CHECK-NEXT:    # kill: %CL<def> %CL<kill> %ECX<kill>
; CHECK-NEXT:    sarl %cl, %edx
; CHECK-NEXT:    movb {{.*}}(%rip), %al
; CHECK-NEXT:    testb %al, %al
; CHECK-NEXT:    je .LBB3_2
; CHECK-NEXT:  # BB#1: # %bb.i.i.i
; CHECK-NEXT:    movb {{.*}}(%rip), %cl
; CHECK-NEXT:  .LBB3_2: # %func_4.exit.i
; CHECK-NEXT:    pushq %rbx
; CHECK-NEXT:    testb %dl, %dl
; CHECK-NEXT:    setne %bl
; CHECK-NEXT:    movl %eax, %ecx
; CHECK-NEXT:    je .LBB3_4
; CHECK-NEXT:  # BB#3: # %func_4.exit.i
; CHECK-NEXT:    xorl %ecx, %ecx
; CHECK-NEXT:  .LBB3_4: # %func_4.exit.i
; CHECK-NEXT:    testb %al, %al
; CHECK-NEXT:    je .LBB3_7
; CHECK-NEXT:  # BB#5: # %func_4.exit.i
; CHECK-NEXT:    testb %bl, %bl
; CHECK-NEXT:    jne .LBB3_7
; CHECK-NEXT:  # BB#6: # %bb.i.i
; CHECK-NEXT:    movb {{.*}}(%rip), %cl
; CHECK-NEXT:    xorl %ebx, %ebx
; CHECK-NEXT:    movl %eax, %ecx
; CHECK-NEXT:  .LBB3_7: # %func_1.exit
; CHECK-NEXT:    movb %cl, {{.*}}(%rip)
; CHECK-NEXT:    movzbl %cl, %esi
; CHECK-NEXT:    movl $_2E_str, %edi
; CHECK-NEXT:    xorl %eax, %eax
; CHECK-NEXT:    callq printf
; CHECK-NEXT:    movl %ebx, %eax
; CHECK-NEXT:    popq %rbx
; CHECK-NEXT:    retq
entry:
  %0 = load i8, i8* @g_3, align 1
  %1 = sext i8 %0 to i32
  %.lobit.i = lshr i8 %0, 7
  %tmp.i = zext i8 %.lobit.i to i32
  %tmp.not.i = xor i32 %tmp.i, 1
  %iftmp.17.0.i.i = ashr i32 %1, %tmp.not.i
  %retval56.i.i = trunc i32 %iftmp.17.0.i.i to i8
  %2 = icmp eq i8 %retval56.i.i, 0
  %g_96.promoted.i = load i8, i8* @g_96
  %3 = icmp eq i8 %g_96.promoted.i, 0
  br i1 %3, label %func_4.exit.i, label %bb.i.i.i

bb.i.i.i:
  %4 = load volatile i8, i8* @g_100, align 1
  br label %func_4.exit.i

func_4.exit.i:
  %.not.i = xor i1 %2, true
  %brmerge.i = or i1 %3, %.not.i
  %.mux.i = select i1 %2, i8 %g_96.promoted.i, i8 0
  br i1 %brmerge.i, label %func_1.exit, label %bb.i.i

bb.i.i:
  %5 = load volatile i8, i8* @g_100, align 1
  br label %func_1.exit

func_1.exit:
  %g_96.tmp.0.i = phi i8 [ %g_96.promoted.i, %bb.i.i ], [ %.mux.i, %func_4.exit.i ]
  %ret = phi i1 [ 0, %bb.i.i ], [ %.not.i, %func_4.exit.i ]
  store i8 %g_96.tmp.0.i, i8* @g_96
  %6 = zext i8 %g_96.tmp.0.i to i32
  %7 = tail call i32 (i8*, ...) @printf(i8* noalias getelementptr ([15 x i8], [15 x i8]* @_2E_str, i64 0, i64 0), i32 %6) nounwind
  ret i1 %ret
}

declare i32 @printf(i8* nocapture, ...) nounwind


; Should compile to setcc | -2.
; rdar://6668608
define i32 @test5(i32* nocapture %P) nounwind readonly {
; CHECK-LABEL: test5:
; CHECK:       # BB#0: # %entry
; CHECK-NEXT:    xorl %eax, %eax
; CHECK-NEXT:    cmpl $41, (%rdi)
; CHECK-NEXT:    setg %al
; CHECK-NEXT:    orl $-2, %eax
; CHECK-NEXT:    retq
entry:
	%0 = load i32, i32* %P, align 4
	%1 = icmp sgt i32 %0, 41
	%iftmp.0.0 = select i1 %1, i32 -1, i32 -2
	ret i32 %iftmp.0.0
}

define i32 @test6(i32* nocapture %P) nounwind readonly {
; CHECK-LABEL: test6:
; CHECK:       # BB#0: # %entry
; CHECK-NEXT:    xorl %eax, %eax
; CHECK-NEXT:    cmpl $42, (%rdi)
; CHECK-NEXT:    setl %al
; CHECK-NEXT:    leal 4(%rax,%rax,8), %eax
; CHECK-NEXT:    retq
entry:
	%0 = load i32, i32* %P, align 4
	%1 = icmp sgt i32 %0, 41
	%iftmp.0.0 = select i1 %1, i32 4, i32 13
	ret i32 %iftmp.0.0
}


; Don't try to use a 16-bit conditional move to do an 8-bit select,
; because it isn't worth it. Just use a branch instead.
define i8 @test7(i1 inreg %c, i8 inreg %a, i8 inreg %b) nounwind {
; CHECK-LABEL: test7:
; CHECK:       # BB#0:
; CHECK-NEXT:    testb $1, %dil
; CHECK-NEXT:    jne .LBB6_2
; CHECK-NEXT:  # BB#1:
; CHECK-NEXT:    movl %edx, %esi
; CHECK-NEXT:  .LBB6_2:
; CHECK-NEXT:    movl %esi, %eax
; CHECK-NEXT:    retq
  %d = select i1 %c, i8 %a, i8 %b
  ret i8 %d
}

define i32 @smin(i32 %x) {
; CHECK-LABEL: smin:
; CHECK:       # BB#0:
; CHECK-NEXT:    notl %edi
; CHECK-NEXT:    testl %edi, %edi
; CHECK-NEXT:    movl $-1, %eax
; CHECK-NEXT:    cmovsl %edi, %eax
; CHECK-NEXT:    retq
  %not_x = xor i32 %x, -1
  %1 = icmp slt i32 %not_x, -1
  %sel = select i1 %1, i32 %not_x, i32 -1
  ret i32 %sel
}