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| ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
; The instructions ADDIStocHA8/LDtocL are used to calculate the address of
; globals. The ones that are in bb.3.if.end could not be hoisted by Machine
; LICM due to BCTRL_LDinto_toc in bb2.if.then. This call causes the compiler
; to insert a save TOC to stack before the call and load into X2 to restore TOC
; after. By communicating to Machine LICM that X2 is guaranteed to have the
; same value before and after BCTRL_LDinto_toc, these instructions can be
; hoisted out of bb.3.if.end to outside of the loop.
; Pre Machine LICM MIR
;
;body:
; bb.0.entry:
; successors: %bb.2.if.then(0x40000000), %bb.3.if.end(0x40000000)
; liveins: %x3
;
; %4 = COPY %x3
; %5 = ADDIStocHA8 %x2, @ga
; %6 = LDtocL @ga, killed %5 :: (load 8 from got)
; %7 = LWZ 0, %6 :: (volatile dereferenceable load 4 from @ga)
; %8 = ADDIStocHA8 %x2, @gb
; %9 = LDtocL @gb, killed %8 :: (load 8 from got)
; %10 = LWZ 0, killed %9 :: (volatile dereferenceable load 4 from @gb)
; %0 = LWZ 0, %6 :: (volatile dereferenceable load 4 from @ga)
; %11 = CMPW killed %7, killed %10
; BCC 44, killed %11, %bb.2.if.then
; B %bb.3.if.end
;
; bb.2.if.then:
; %1 = PHI %0, %bb.0.entry, %3, %bb.3.if.end
; ADJCALLSTACKDOWN 32, 0, implicit-def dead %r1, implicit %r1
; %20 = COPY %x2
; STD %20, 24, %x1 :: (store 8 into stack + 24)
; %21 = EXTSW_32_64 %1
; %x3 = COPY %21
; %x12 = COPY %4
; MTCTR8 %4, implicit-def %ctr8
; BCTRL8_LDinto_toc 24, %x1, csr_svr464_altivec, implicit-def dead %lr8, implicit-def dead %x2, implicit %ctr8, implicit %rm, implicit %x3, implicit %x12, implicit %x2, implicit-def %r1, implicit-def %x3
; ADJCALLSTACKUP 32, 0, implicit-def dead %r1, implicit %r1
; %22 = COPY %x3
; %x3 = COPY %22
; BLR8 implicit %lr8, implicit %rm, implicit %x3
;
; bb.3.if.end:
; successors: %bb.2.if.then(0x04000000), %bb.3.if.end(0x7c000000)
;
; %2 = PHI %0, %bb.0.entry, %3, %bb.3.if.end
; %12 = ADDI %2, 1
; %13 = ADDIStocHA8 %x2, @ga
; %14 = LDtocL @ga, killed %13 :: (load 8 from got)
; STW killed %12, 0, %14 :: (volatile store 4 into @ga)
; %15 = LWZ 0, %14 :: (volatile dereferenceable load 4 from @ga)
; %16 = ADDIStocHA8 %x2, @gb
; %17 = LDtocL @gb, killed %16 :: (load 8 from got)
; %18 = LWZ 0, killed %17 :: (volatile dereferenceable load 4 from @gb)
; %3 = LWZ 0, %14 :: (volatile dereferenceable load 4 from @ga)
; %19 = CMPW killed %15, killed %18
; BCC 44, killed %19, %bb.2.if.then
; B %bb.3.if.end
@ga = external global i32, align 4
@gb = external global i32, align 4
define signext i32 @test(i32 (i32)* nocapture %FP) local_unnamed_addr #0 {
; CHECK-LABEL: test:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: mflr 0
; CHECK: addis 4, 2, .LC0@toc@ha
; CHECK-NEXT: addis 5, 2, .LC1@toc@ha
; CHECK-NEXT: mr 12, 3
; CHECK-NEXT: ld 4, .LC0@toc@l(4)
; CHECK-NEXT: ld 5, .LC1@toc@l(5)
; CHECK-NEXT: lwz 6, 0(4)
; CHECK-NEXT: lwz 7, 0(5)
; CHECK-NEXT: cmpw 6, 7
; CHECK-NEXT: lwz 6, 0(4)
; CHECK-NEXT: bgt 0, .LBB0_2
; CHECK-NOT: addis {{[0-9]+}}, 2, .LC0@toc@ha
; CHECK-NOT: addis {{[0-9]+}}, 2, .LC1@toc@ha
; CHECK-NEXT: .p2align 5
; CHECK-NEXT: .LBB0_1: # %if.end
; CHECK-NOT: addis {{[0-9]+}}, 2, .LC0@toc@ha
; CHECK-NOT: addis {{[0-9]+}}, 2, .LC1@toc@ha
; CHECK: blr
entry:
%0 = load volatile i32, i32* @ga, align 4
%1 = load volatile i32, i32* @gb, align 4
%cmp1 = icmp sgt i32 %0, %1
%2 = load volatile i32, i32* @ga, align 4
br i1 %cmp1, label %if.then, label %if.end
if.then: ; preds = %if.end, %entry
%.lcssa = phi i32 [ %2, %entry ], [ %6, %if.end ]
%call = tail call signext i32 %FP(i32 signext %.lcssa) #1
ret i32 %call
if.end: ; preds = %entry, %if.end
%3 = phi i32 [ %6, %if.end ], [ %2, %entry ]
%inc = add nsw i32 %3, 1
store volatile i32 %inc, i32* @ga, align 4
%4 = load volatile i32, i32* @ga, align 4
%5 = load volatile i32, i32* @gb, align 4
%cmp = icmp sgt i32 %4, %5
%6 = load volatile i32, i32* @ga, align 4
br i1 %cmp, label %if.then, label %if.end
}
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