# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s --- | define i64 @test(i64 %x, i64 %y) #0 { entry: %x0 = call { i64, i64 } asm "foo", "=r,=r,1,0,~{dirflag},~{fpsr},~{flags}"(i64 %x, i64 %y) #0 %x1 = extractvalue { i64, i64 } %x0, 0 ret i64 %x1 } define i64 @test2(i64 %x, i64 %y) #0 { entry: %x0 = call { i64, i64 } asm "foo", "=r,=r,1,0,~{dirflag},~{fpsr},~{flags}"(i64 %x, i64 %y) #0 %x1 = extractvalue { i64, i64 } %x0, 0 ret i64 %x1 } attributes #0 = { nounwind } ... --- name: test tracksRegLiveness: true liveins: - { reg: '$rdi' } - { reg: '$rsi' } body: | bb.0.entry: liveins: $rdi, $rsi ; CHECK-LABEL: name: test ; CHECK: INLINEASM &foo, 0, 2818058, def $rsi, 2818058, def dead $rdi, INLINEASM &foo, 0, 2818058, def $rsi, 2818058, def dead $rdi, 2147549193, killed $rdi, 2147483657, killed $rsi, 12, implicit-def dead early-clobber $eflags $rax = MOV64rr killed $rsi RETQ killed $rax ... --- name: test2 tracksRegLiveness: true liveins: - { reg: '$rdi' } - { reg: '$rsi' } body: | bb.0.entry: liveins: $rdi, $rsi ; Verify that the register ties are preserved. ; CHECK-LABEL: name: test2 ; CHECK: INLINEASM &foo, 0, 2818058, def $rsi, 2818058, def dead $rdi, 2147549193, killed $rdi(tied-def 5), 2147483657, killed $rsi(tied-def 3), 12, implicit-def dead early-clobber $eflags INLINEASM &foo, 0, 2818058, def $rsi, 2818058, def dead $rdi, 2147549193, killed $rdi(tied-def 5), 2147483657, killed $rsi(tied-def 3), 12, implicit-def dead early-clobber $eflags $rax = MOV64rr killed $rsi RETQ killed $rax ...