--- /dev/null
+# 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: 4
+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 = ADDIStocHA $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 = ADDIStocHA $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 = ADDIStocHA $x2, @c
+ %10:g8rc_and_g8rc_nox0 = ADDIStocHA $x2, @e
+ %13:g8rc_and_g8rc_nox0 = ADDIStocHA $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