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# RUN: llc -mtriple=aarch64 -o - %s \
# RUN: -run-pass dead-mi-elimination | FileCheck %s
# RUN: llc -mtriple=aarch64 -o - %s -p dead-mi-elimination | FileCheck %s
--- |
@c = internal unnamed_addr global [3 x i8] zeroinitializer, align 4
@d = common dso_local local_unnamed_addr global i32 0, align 4
define dso_local i32 @main() local_unnamed_addr {
%scevgep = getelementptr i8, ptr getelementptr inbounds ([3 x i8], ptr @c, i64 0, i64 1), i64 0
ret i32 0
}
...
---
name: main
tracksRegLiveness: true
registers:
- { id: 0, class: gpr64common, preferred-register: '' }
- { id: 1, class: gpr64common, preferred-register: '' }
- { id: 2, class: gpr64, preferred-register: '' }
- { id: 3, class: gpr64common, preferred-register: '' }
- { id: 4, class: gpr32, preferred-register: '' }
- { id: 5, class: gpr32all, preferred-register: '' }
- { id: 6, class: gpr64common, preferred-register: '' }
body: |
bb.0:
successors: %bb.4(0x30000000), %bb.5(0x50000000)
%0:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
CBZX killed %0, %bb.4
B %bb.5
bb.1:
successors: %bb.3(0x04000000), %bb.2(0x7c000000)
%1:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
%2:gpr64 = SUBSXri %1, 2, 0, implicit-def $nzcv
Bcc 0, %bb.3, implicit $nzcv
B %bb.2
bb.2:
successors: %bb.1(0x80000000)
%3:gpr64common = ADDXrr %6, %2
%4:gpr32 = LDRBBui killed %3, 1 :: (load (s8) from %ir.scevgep)
%5:gpr32all = COPY %4
B %bb.1
bb.3:
ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
$x0 = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
RET_ReallyLR implicit $w0
bb.4:
successors: %bb.5(0x80000000)
bb.5:
successors: %bb.1(0x80000000)
; CHECK: bb.5
; CHECK-NOT: %6:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
%6:gpr64common = MOVaddr target-flags(aarch64-page) @c, target-flags(aarch64-pageoff, aarch64-nc) @c
B %bb.1
...
|
