1; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s 2 3; The instructions ADDIStocHA8/LDtocL are used to calculate the address of 4; globals. The ones that are in bb.3.if.end could not be hoisted by Machine 5; LICM due to BCTRL_LDinto_toc in bb2.if.then. This call causes the compiler 6; to insert a save TOC to stack before the call and load into X2 to restore TOC 7; after. By communicating to Machine LICM that X2 is guaranteed to have the 8; same value before and after BCTRL_LDinto_toc, these instructions can be 9; hoisted out of bb.3.if.end to outside of the loop. 10 11; Pre Machine LICM MIR 12; 13;body: 14; bb.0.entry: 15; successors: %bb.2.if.then(0x40000000), %bb.3.if.end(0x40000000) 16; liveins: %x3 17; 18; %4 = COPY %x3 19; %5 = ADDIStocHA8 %x2, @ga 20; %6 = LDtocL @ga, killed %5 :: (load 8 from got) 21; %7 = LWZ 0, %6 :: (volatile dereferenceable load 4 from @ga) 22; %8 = ADDIStocHA8 %x2, @gb 23; %9 = LDtocL @gb, killed %8 :: (load 8 from got) 24; %10 = LWZ 0, killed %9 :: (volatile dereferenceable load 4 from @gb) 25; %0 = LWZ 0, %6 :: (volatile dereferenceable load 4 from @ga) 26; %11 = CMPW killed %7, killed %10 27; BCC 44, killed %11, %bb.2.if.then 28; B %bb.3.if.end 29; 30; bb.2.if.then: 31; %1 = PHI %0, %bb.0.entry, %3, %bb.3.if.end 32; ADJCALLSTACKDOWN 32, 0, implicit-def dead %r1, implicit %r1 33; %20 = COPY %x2 34; STD %20, 24, %x1 :: (store 8 into stack + 24) 35; %21 = EXTSW_32_64 %1 36; %x3 = COPY %21 37; %x12 = COPY %4 38; MTCTR8 %4, implicit-def %ctr8 39; BCTRL8_LDinto_toc 24, %x1, csr_ppc64_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 40; ADJCALLSTACKUP 32, 0, implicit-def dead %r1, implicit %r1 41; %22 = COPY %x3 42; %x3 = COPY %22 43; BLR8 implicit %lr8, implicit %rm, implicit %x3 44; 45; bb.3.if.end: 46; successors: %bb.2.if.then(0x04000000), %bb.3.if.end(0x7c000000) 47; 48; %2 = PHI %0, %bb.0.entry, %3, %bb.3.if.end 49; %12 = ADDI %2, 1 50; %13 = ADDIStocHA8 %x2, @ga 51; %14 = LDtocL @ga, killed %13 :: (load 8 from got) 52; STW killed %12, 0, %14 :: (volatile store 4 into @ga) 53; %15 = LWZ 0, %14 :: (volatile dereferenceable load 4 from @ga) 54; %16 = ADDIStocHA8 %x2, @gb 55; %17 = LDtocL @gb, killed %16 :: (load 8 from got) 56; %18 = LWZ 0, killed %17 :: (volatile dereferenceable load 4 from @gb) 57; %3 = LWZ 0, %14 :: (volatile dereferenceable load 4 from @ga) 58; %19 = CMPW killed %15, killed %18 59; BCC 44, killed %19, %bb.2.if.then 60; B %bb.3.if.end 61 62@ga = external global i32, align 4 63@gb = external global i32, align 4 64define signext i32 @test(i32 (i32)* nocapture %FP) local_unnamed_addr #0 { 65; CHECK-LABEL: test: 66; CHECK: # %bb.0: # %entry 67; CHECK-NEXT: mflr 0 68; CHECK: addis 4, 2, .LC0@toc@ha 69; CHECK-NEXT: addis 5, 2, .LC1@toc@ha 70; CHECK-NEXT: mr 12, 3 71; CHECK-NEXT: ld 4, .LC0@toc@l(4) 72; CHECK-NEXT: ld 5, .LC1@toc@l(5) 73; CHECK-NEXT: lwz 6, 0(4) 74; CHECK-NEXT: lwz 7, 0(5) 75; CHECK-NEXT: cmpw 6, 7 76; CHECK-NEXT: lwz 6, 0(4) 77; CHECK-NEXT: bgt 0, .LBB0_2 78; CHECK-NOT: addis {{[0-9]+}}, 2, .LC0@toc@ha 79; CHECK-NOT: addis {{[0-9]+}}, 2, .LC1@toc@ha 80; CHECK-NEXT: .p2align 5 81; CHECK-NEXT: .LBB0_1: # %if.end 82; CHECK-NOT: addis {{[0-9]+}}, 2, .LC0@toc@ha 83; CHECK-NOT: addis {{[0-9]+}}, 2, .LC1@toc@ha 84; CHECK: blr 85entry: 86 %0 = load volatile i32, i32* @ga, align 4 87 %1 = load volatile i32, i32* @gb, align 4 88 %cmp1 = icmp sgt i32 %0, %1 89 %2 = load volatile i32, i32* @ga, align 4 90 br i1 %cmp1, label %if.then, label %if.end 91 92if.then: ; preds = %if.end, %entry 93 %.lcssa = phi i32 [ %2, %entry ], [ %6, %if.end ] 94 %call = tail call signext i32 %FP(i32 signext %.lcssa) #1 95 ret i32 %call 96 97if.end: ; preds = %entry, %if.end 98 %3 = phi i32 [ %6, %if.end ], [ %2, %entry ] 99 %inc = add nsw i32 %3, 1 100 store volatile i32 %inc, i32* @ga, align 4 101 %4 = load volatile i32, i32* @ga, align 4 102 %5 = load volatile i32, i32* @gb, align 4 103 %cmp = icmp sgt i32 %4, %5 104 %6 = load volatile i32, i32* @ga, align 4 105 br i1 %cmp, label %if.then, label %if.end 106} 107