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| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=x86_64-grtev4-linux-gnu -run-pass=regallocfast -o - %s | FileCheck %s
# Bug 41973. Make sure %12 is detected as live out of %bb.0, even
# though the use is allocated before the def block %bb.3. Previously
# mayLiveOut only recorded on defs, and would not find the virtual
# register use if it had already been replace with a physical
# register.
---
name: main
tracksRegLiveness: true
body: |
; CHECK-LABEL: name: main
; CHECK: bb.0:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: liveins: $edi, $rsi
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed $rsi :: (store 8 into %stack.0)
; CHECK: JMP_1 %bb.3
; CHECK: bb.1:
; CHECK: successors:
; CHECK: bb.2:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: $rax = MOV64rm %stack.1, 1, $noreg, 0, $noreg :: (load 8 from %stack.1)
; CHECK: renamable $ecx = MOV32r0 implicit-def $eflags
; CHECK: renamable $rdx = SUBREG_TO_REG 0, killed renamable $ecx, %subreg.sub_32bit
; CHECK: MOV64mi32 killed renamable $rax, 1, $noreg, 0, $noreg, 0 :: (volatile store 8)
; CHECK: MOV64mr %stack.0, 1, $noreg, 0, $noreg, killed $rdx :: (store 8 into %stack.0)
; CHECK: bb.3:
; CHECK: successors: %bb.2(0x40000000), %bb.1(0x40000000)
; CHECK: $rax = MOV64rm %stack.0, 1, $noreg, 0, $noreg :: (load 8 from %stack.0)
; CHECK: renamable $ecx = MOV32r0 implicit-def dead $eflags
; CHECK: renamable $rdx = SUBREG_TO_REG 0, killed renamable $ecx, %subreg.sub_32bit
; CHECK: MOV64mr %stack.1, 1, $noreg, 0, $noreg, killed $rdx :: (store 8 into %stack.1)
; CHECK: JMP64r killed renamable $rax
bb.0:
liveins: $edi, $rsi
%4:gr64 = COPY $rsi
%2:gr32 = COPY $edi
%3:gr32 = COPY killed %2
%5:gr64 = COPY killed %4
%13:gr64 = COPY %5
JMP_1 %bb.3
bb.1:
successors:
bb.2:
%0:gr64 = COPY %12
%10:gr32 = MOV32r0 implicit-def $eflags
%11:gr64 = SUBREG_TO_REG 0, %10, %subreg.sub_32bit
MOV64mi32 %0, 1, $noreg, 0, $noreg, 0 :: (volatile store 8)
%13:gr64 = COPY %11
bb.3:
successors: %bb.2, %bb.1
%1:gr64 = COPY %13
%9:gr32 = MOV32r0 implicit-def dead $eflags
%8:gr64 = SUBREG_TO_REG 0, killed %9, %subreg.sub_32bit
%12:gr64 = COPY %8
JMP64r %1
...
|