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| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -o - %s -mtriple=x86_64--unknown-linux-gnu | FileCheck %s
@base = external dso_local local_unnamed_addr global i16, align 2
; We should be able to merge the two loads here
define i16 @unify_through_trivial_asm() {
; CHECK-LABEL: unify_through_trivial_asm:
; CHECK: # %bb.0:
; CHECK-NEXT: movzwl {{.*}}(%rip), %eax
; CHECK-NEXT: #APP
; CHECK-NEXT: nop
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %eax
; CHECK-NEXT: incl %eax
; CHECK-NEXT: # kill: def $ax killed $ax killed $eax
; CHECK-NEXT: retq
%x = load i16, i16* @base, align 2
tail call void asm sideeffect "nop", "r,~{dirflag},~{fpsr},~{flags}"(i16 %x)
%x2 = load i16, i16* @base, align 2
%v = add i16 %x2, 1
ret i16 %v
}
; The asm call prevents the merging the loads here.
define i16 @unify_through_trival_asm_w_memory_clobber() {
; CHECK-LABEL: unify_through_trival_asm_w_memory_clobber:
; CHECK: # %bb.0:
; CHECK-NEXT: movzwl {{.*}}(%rip), %eax
; CHECK-NEXT: #APP
; CHECK-NEXT: nop
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %eax
; CHECK-NEXT: incl %eax
; CHECK-NEXT: # kill: def $ax killed $ax killed $eax
; CHECK-NEXT: retq
%x = load i16, i16* @base, align 2
tail call void asm sideeffect "nop", "+r,~{dirflag},~{fpsr},~{flags},~{base},~{memory}"(i16 %x)
%x2 = load i16, i16* @base, align 2
%v = add i16 %x2, 1
ret i16 %v
}
define dso_local void @fulltest() local_unnamed_addr {
; CHECK-LABEL: fulltest:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $1, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $2, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $3, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $4, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $5, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $6, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $7, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: movzwl {{.*}}(%rip), %edx
; CHECK-NEXT: addl $16, %edx
; CHECK-NEXT: movb $8, %al
; CHECK-NEXT: # kill: def $dx killed $dx killed $edx
; CHECK-NEXT: #APP
; CHECK-NEXT: outb %al, %dx
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: retq
entry:
%0 = load i16, i16* @base, align 2
%add = add i16 %0, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 0, i16 %add)
%1 = load i16, i16* @base, align 2
%add3 = add i16 %1, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 1, i16 %add3)
%2 = load i16, i16* @base, align 2
%add6 = add i16 %2, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 2, i16 %add6)
%3 = load i16, i16* @base, align 2
%add9 = add i16 %3, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 3, i16 %add9)
%4 = load i16, i16* @base, align 2
%add12 = add i16 %4, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 4, i16 %add12)
%5 = load i16, i16* @base, align 2
%add15 = add i16 %5, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 5, i16 %add15)
%6 = load i16, i16* @base, align 2
%add18 = add i16 %6, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 6, i16 %add18)
%7 = load i16, i16* @base, align 2
%add21 = add i16 %7, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 7, i16 %add21)
%8 = load i16, i16* @base, align 2
%add24 = add i16 %8, 16
tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 8, i16 %add24)
ret void
}
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