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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc -o - %s -mtriple=x86_64--unknown-linux-gnu | FileCheck %s3 4@base = external dso_local local_unnamed_addr global i16, align 25 6; We should be able to merge the two loads here7define i16 @unify_through_trivial_asm() {8; CHECK-LABEL: unify_through_trivial_asm:9; CHECK: # %bb.0:10; CHECK-NEXT: movzwl base(%rip), %eax11; CHECK-NEXT: #APP12; CHECK-NEXT: nop13; CHECK-NEXT: #NO_APP14; CHECK-NEXT: movzwl base(%rip), %eax15; CHECK-NEXT: incl %eax16; CHECK-NEXT: # kill: def $ax killed $ax killed $eax17; CHECK-NEXT: retq18 %x = load i16, ptr @base, align 219 tail call void asm sideeffect "nop", "r,~{dirflag},~{fpsr},~{flags}"(i16 %x)20 %x2 = load i16, ptr @base, align 221 %v = add i16 %x2, 122 ret i16 %v23}24 25; The asm call prevents the merging the loads here.26define i16 @unify_through_trival_asm_w_memory_clobber() {27; CHECK-LABEL: unify_through_trival_asm_w_memory_clobber:28; CHECK: # %bb.0:29; CHECK-NEXT: movzwl base(%rip), %eax30; CHECK-NEXT: #APP31; CHECK-NEXT: nop32; CHECK-NEXT: #NO_APP33; CHECK-NEXT: movzwl base(%rip), %eax34; CHECK-NEXT: incl %eax35; CHECK-NEXT: # kill: def $ax killed $ax killed $eax36; CHECK-NEXT: retq37 %x = load i16, ptr @base, align 238 tail call void asm sideeffect "nop", "+r,~{dirflag},~{fpsr},~{flags},~{base},~{memory}"(i16 %x)39 %x2 = load i16, ptr @base, align 240 %v = add i16 %x2, 141 ret i16 %v42}43 44define dso_local void @fulltest() local_unnamed_addr {45; CHECK-LABEL: fulltest:46; CHECK: # %bb.0: # %entry47; CHECK-NEXT: movzwl base(%rip), %edx48; CHECK-NEXT: addl $16, %edx49; CHECK-NEXT: xorl %eax, %eax50; CHECK-NEXT: # kill: def $dx killed $dx killed $edx51; CHECK-NEXT: #APP52; CHECK-NEXT: outb %al, %dx53; CHECK-NEXT: #NO_APP54; CHECK-NEXT: movzwl base(%rip), %edx55; CHECK-NEXT: addl $16, %edx56; CHECK-NEXT: movb $1, %al57; CHECK-NEXT: # kill: def $dx killed $dx killed $edx58; CHECK-NEXT: #APP59; CHECK-NEXT: outb %al, %dx60; CHECK-NEXT: #NO_APP61; CHECK-NEXT: movzwl base(%rip), %edx62; CHECK-NEXT: addl $16, %edx63; CHECK-NEXT: movb $2, %al64; CHECK-NEXT: # kill: def $dx killed $dx killed $edx65; CHECK-NEXT: #APP66; CHECK-NEXT: outb %al, %dx67; CHECK-NEXT: #NO_APP68; CHECK-NEXT: movzwl base(%rip), %edx69; CHECK-NEXT: addl $16, %edx70; CHECK-NEXT: movb $3, %al71; CHECK-NEXT: # kill: def $dx killed $dx killed $edx72; CHECK-NEXT: #APP73; CHECK-NEXT: outb %al, %dx74; CHECK-NEXT: #NO_APP75; CHECK-NEXT: movzwl base(%rip), %edx76; CHECK-NEXT: addl $16, %edx77; CHECK-NEXT: movb $4, %al78; CHECK-NEXT: # kill: def $dx killed $dx killed $edx79; CHECK-NEXT: #APP80; CHECK-NEXT: outb %al, %dx81; CHECK-NEXT: #NO_APP82; CHECK-NEXT: movzwl base(%rip), %edx83; CHECK-NEXT: addl $16, %edx84; CHECK-NEXT: movb $5, %al85; CHECK-NEXT: # kill: def $dx killed $dx killed $edx86; CHECK-NEXT: #APP87; CHECK-NEXT: outb %al, %dx88; CHECK-NEXT: #NO_APP89; CHECK-NEXT: movzwl base(%rip), %edx90; CHECK-NEXT: addl $16, %edx91; CHECK-NEXT: movb $6, %al92; CHECK-NEXT: # kill: def $dx killed $dx killed $edx93; CHECK-NEXT: #APP94; CHECK-NEXT: outb %al, %dx95; CHECK-NEXT: #NO_APP96; CHECK-NEXT: movzwl base(%rip), %edx97; CHECK-NEXT: addl $16, %edx98; CHECK-NEXT: movb $7, %al99; CHECK-NEXT: # kill: def $dx killed $dx killed $edx100; CHECK-NEXT: #APP101; CHECK-NEXT: outb %al, %dx102; CHECK-NEXT: #NO_APP103; CHECK-NEXT: movzwl base(%rip), %edx104; CHECK-NEXT: addl $16, %edx105; CHECK-NEXT: movb $8, %al106; CHECK-NEXT: # kill: def $dx killed $dx killed $edx107; CHECK-NEXT: #APP108; CHECK-NEXT: outb %al, %dx109; CHECK-NEXT: #NO_APP110; CHECK-NEXT: retq111entry:112 %0 = load i16, ptr @base, align 2113 %add = add i16 %0, 16114 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 0, i16 %add)115 %1 = load i16, ptr @base, align 2116 %add3 = add i16 %1, 16117 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 1, i16 %add3)118 %2 = load i16, ptr @base, align 2119 %add6 = add i16 %2, 16120 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 2, i16 %add6)121 %3 = load i16, ptr @base, align 2122 %add9 = add i16 %3, 16123 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 3, i16 %add9)124 %4 = load i16, ptr @base, align 2125 %add12 = add i16 %4, 16126 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 4, i16 %add12)127 %5 = load i16, ptr @base, align 2128 %add15 = add i16 %5, 16129 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 5, i16 %add15)130 %6 = load i16, ptr @base, align 2131 %add18 = add i16 %6, 16132 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 6, i16 %add18)133 %7 = load i16, ptr @base, align 2134 %add21 = add i16 %7, 16135 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 7, i16 %add21)136 %8 = load i16, ptr @base, align 2137 %add24 = add i16 %8, 16138 tail call void asm sideeffect "outb %al,${1:w}", "{ax},{dx},~{dirflag},~{fpsr},~{flags}"(i8 8, i16 %add24)139 ret void140}141