# RUN: llc -run-pass simple-register-coalescing %s -o - | FileCheck %s
--- |
target datalayout = "e-m:e-i64:64-n32:64"
target triple = "powerpc64le-unknown-linux-gnu"
@b = common dso_local local_unnamed_addr global i32 0, align 4
@d = common dso_local local_unnamed_addr global i32 0, align 4
@e = common dso_local local_unnamed_addr global i32* null, align 8
@c = common dso_local local_unnamed_addr global i32 0, align 4
@a = common dso_local local_unnamed_addr global [1 x i32] zeroinitializer, align 4
; Function Attrs: norecurse nounwind
define dso_local signext i32 @copycrunset() local_unnamed_addr #0 {
entry:
%0 = load i32, i32* @b, align 4
%tobool3 = icmp eq i32 %0, 0
br i1 %tobool3, label %while.end, label %while.body.preheader
while.body.preheader: ; preds = %entry
%.pre = load i32, i32* @d, align 4
%tobool1 = icmp eq i32 %.pre, 0
br label %while.body
while.body: ; preds = %land.end, %while.body.preheader
br i1 %tobool1, label %land.end, label %land.rhs
land.rhs: ; preds = %while.body
%1 = load i32*, i32** @e, align 8
%2 = load i32, i32* %1, align 4
%idxprom = sext i32 %2 to i64
%arrayidx = getelementptr inbounds [1 x i32], [1 x i32]* @a, i64 0, i64 %idxprom
%3 = load i32, i32* %arrayidx, align 4
%tobool2 = icmp ne i32 %3, 0
br label %land.end
land.end: ; preds = %land.rhs, %while.body
%4 = phi i1 [ false, %while.body ], [ %tobool2, %land.rhs ]
%land.ext = zext i1 %4 to i32
store i32 %land.ext, i32* @c, align 4
br label %while.body
while.end: ; preds = %entry
ret i32 undef
}
...
---
name: copycrunset
alignment: 16
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers:
- { id: 0, class: crbitrc, preferred-register: '' }
- { id: 1, class: crbitrc, preferred-register: '' }
- { id: 2, class: crbitrc, preferred-register: '' }
- { id: 3, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 4, class: gprc, preferred-register: '' }
- { id: 5, class: crrc, preferred-register: '' }
- { id: 6, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 7, class: gprc, preferred-register: '' }
- { id: 8, class: crrc, preferred-register: '' }
- { id: 9, class: crbitrc, preferred-register: '' }
- { id: 10, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 11, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 12, class: g8rc, preferred-register: '' }
- { id: 13, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 14, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 15, class: g8rc, preferred-register: '' }
- { id: 16, class: gprc, preferred-register: '' }
- { id: 17, class: crrc, preferred-register: '' }
- { id: 18, class: crbitrc, preferred-register: '' }
- { id: 19, class: gprc_and_gprc_nor0, preferred-register: '' }
- { id: 20, class: gprc_and_gprc_nor0, preferred-register: '' }
- { id: 21, class: gprc, preferred-register: '' }
- { id: 22, class: g8rc_and_g8rc_nox0, preferred-register: '' }
- { id: 23, class: g8rc, preferred-register: '' }
- { id: 24, class: crbitrc, preferred-register: '' }
liveins:
- { reg: '$x2', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 4294967295
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.5(0x30000000), %bb.1(0x50000000)
liveins: $x2
%3:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @b
%4:gprc = LWZ target-flags(ppc-toc-lo) @b, killed %3, implicit $x2 :: (dereferenceable load (s32) from @b)
%5:crrc = CMPLWI killed %4, 0
BCC 76, killed %5, %bb.5
B %bb.1
bb.1.while.body.preheader:
successors: %bb.2(0x80000000)
liveins: $x2
%6:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @d
%7:gprc = LWZ target-flags(ppc-toc-lo) @d, killed %6, implicit $x2 :: (dereferenceable load (s32) from @d)
%8:crrc = CMPWI killed %7, 0
%0:crbitrc = COPY killed %8.sub_eq
%9:crbitrc = CRUNSET
%19:gprc_and_gprc_nor0 = LI 0
%20:gprc_and_gprc_nor0 = LI 1
%22:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @c
%10:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @e
%13:g8rc_and_g8rc_nox0 = ADDIStocHA8 $x2, @a
%14:g8rc_and_g8rc_nox0 = ADDItocL killed %13, @a, implicit $x2
bb.2.while.body:
successors: %bb.4(0x30000000), %bb.3(0x50000000)
liveins: $x2
%24:crbitrc = COPY %9
BC %0, %bb.4
B %bb.3
bb.3.land.rhs:
successors: %bb.4(0x80000000)
liveins: $x2
%11:g8rc_and_g8rc_nox0 = LD target-flags(ppc-toc-lo) @e, %10, implicit $x2 :: (dereferenceable load (s64) from @e)
%12:g8rc = LWA 0, killed %11 :: (load (s32) from %ir.1)
%15:g8rc = RLDICR killed %12, 2, 61
%16:gprc = LWZX %14, killed %15 :: (load (s32) from %ir.arrayidx)
%17:crrc = CMPWI killed %16, 0
%18:crbitrc = COPY killed %17.sub_eq
%1:crbitrc = CRNOR killed %18, %18
%24:crbitrc = COPY killed %1
bb.4.land.end:
successors: %bb.2(0x80000000)
liveins: $x2
%2:crbitrc = COPY killed %24
%21:gprc = ISEL %20, %19, killed %2
STW killed %21, target-flags(ppc-toc-lo) @c, %22, implicit $x2 :: (store (s32) into @c)
B %bb.2
bb.5.while.end:
%23:g8rc = LI8 0
$x3 = COPY killed %23
BLR8 implicit $lr8, implicit $rm, implicit killed $x3
...
#Copy of CRUNSET should be removed in simple register coalescing pass
#CHECK-LABEL: copycrunset
#CHECK: bb.1.while.body.preheader:
#CHECK-NOT: %9:crbitrc = CRUNSET
#CHECK: bb.2.while.body:
#CHECK-NOT: %24:crbitrc = COPY %9
#CHECK: %24:crbitrc = CRUNSET
#CHECK: B %bb.3