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1# RUN: llc %s -run-pass greedy -o - | FileCheck %s2# Check that we don't insert spill code for undef values.3# Uninitialized memory for them is fine.4# PR333115--- |6 ; ModuleID = 'stuff.ll'7 target triple = "aarch64--"8 9 @g = external global i3210 11 define void @foobar() {12 ret void13 }14 15...16---17name: foobar18alignment: 419tracksRegLiveness: true20registers:21 - { id: 0, class: gpr32 }22 - { id: 1, class: gpr32 }23 - { id: 2, class: gpr32all }24 - { id: 3, class: gpr32 }25 - { id: 4, class: gpr64common }26 - { id: 5, class: gpr32 }27 - { id: 6, class: gpr64common }28 - { id: 7, class: gpr32 }29 - { id: 8, class: gpr32 }30 - { id: 9, class: gpr64 }31body: |32 bb.0:33 liveins: $x034 successors: %bb.1, %bb.235 36 ; %8 is going to be spilled.37 ; But on that path, we don't care about its value.38 ; Emit a simple KILL instruction instead of an39 ; actual spill.40 ; CHECK: [[UNDEF:%[0-9]+]]:gpr32 = IMPLICIT_DEF41 ; CHECK-NEXT: KILL [[UNDEF]]42 %8 = IMPLICIT_DEF43 ; %9 us going to be spilled.44 ; But it is only partially undef.45 ; Make sure we spill it properly46 ; CHECK: [[NINE:%[0-9]+]]:gpr64 = COPY $x047 ; CHECK: [[NINE]].sub_32:gpr64 = IMPLICIT_DEF48 ; CHECK-NEXT: STRXui [[NINE]]49 %9 = COPY $x050 %9.sub_32 = IMPLICIT_DEF51 CBNZW $wzr, %bb.252 B %bb.153 54 bb.1:55 %4 = ADRP target-flags(aarch64-page) @g56 %8 = LDRWui %4, target-flags(aarch64-pageoff, aarch64-nc) @g :: (volatile dereferenceable load (s32) from @g)57 INLINEASM &nop, 1, 12, implicit-def dead early-clobber $x0, 12, implicit-def dead early-clobber $x1, 12, implicit-def dead early-clobber $x2, 12, implicit-def dead early-clobber $x3, 12, implicit-def dead early-clobber $x4, 12, implicit-def dead early-clobber $x5, 12, implicit-def dead early-clobber $x6, 12, implicit-def dead early-clobber $x7, 12, implicit-def dead early-clobber $x8, 12, implicit-def dead early-clobber $x9, 12, implicit-def dead early-clobber $x10, 12, implicit-def dead early-clobber $x11, 12, implicit-def dead early-clobber $x12, 12, implicit-def dead early-clobber $x13, 12, implicit-def dead early-clobber $x14, 12, implicit-def dead early-clobber $x15, 12, implicit-def dead early-clobber $x16, 12, implicit-def dead early-clobber $x17, 12, implicit-def dead early-clobber $x18, 12, implicit-def dead early-clobber $x19, 12, implicit-def dead early-clobber $x20, 12, implicit-def dead early-clobber $x21, 12, implicit-def dead early-clobber $x22, 12, implicit-def dead early-clobber $x23, 12, implicit-def dead early-clobber $x24, 12, implicit-def dead early-clobber $x25, 12, implicit-def dead early-clobber $x26, 12, implicit-def dead early-clobber $x27, 12, implicit-def dead early-clobber $x28, 12, implicit-def dead early-clobber $fp, 12, implicit-def dead early-clobber $lr58 59 bb.2:60 INLINEASM &nop, 1, 12, implicit-def dead early-clobber $x0, 12, implicit-def dead early-clobber $x1, 12, implicit-def dead early-clobber $x2, 12, implicit-def dead early-clobber $x3, 12, implicit-def dead early-clobber $x4, 12, implicit-def dead early-clobber $x5, 12, implicit-def dead early-clobber $x6, 12, implicit-def dead early-clobber $x7, 12, implicit-def dead early-clobber $x8, 12, implicit-def dead early-clobber $x9, 12, implicit-def dead early-clobber $x10, 12, implicit-def dead early-clobber $x11, 12, implicit-def dead early-clobber $x12, 12, implicit-def dead early-clobber $x13, 12, implicit-def dead early-clobber $x14, 12, implicit-def dead early-clobber $x15, 12, implicit-def dead early-clobber $x16, 12, implicit-def dead early-clobber $x17, 12, implicit-def dead early-clobber $x18, 12, implicit-def dead early-clobber $x19, 12, implicit-def dead early-clobber $x20, 12, implicit-def dead early-clobber $x21, 12, implicit-def dead early-clobber $x22, 12, implicit-def dead early-clobber $x23, 12, implicit-def dead early-clobber $x24, 12, implicit-def dead early-clobber $x25, 12, implicit-def dead early-clobber $x26, 12, implicit-def dead early-clobber $x27, 12, implicit-def dead early-clobber $x28, 12, implicit-def dead early-clobber $fp, 12, implicit-def dead early-clobber $lr61 %6 = ADRP target-flags(aarch64-page) @g62 $w0 = MOVi32imm 4263 STRWui %8, %6, target-flags(aarch64-pageoff, aarch64-nc) @g :: (volatile store (s32) into @g)64 STRXui %9, %6, target-flags(aarch64-pageoff, aarch64-nc) @g :: (volatile store (s64) into @g)65 RET_ReallyLR implicit killed $w066 67...68