# 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 4 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 4 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 8 from @e) %12:g8rc = LWA 0, killed %11 :: (load 4 from %ir.1) %15:g8rc = RLDICR killed %12, 2, 61 %16:gprc = LWZX %14, killed %15 :: (load 4 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 4 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