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104 lines
3.3 KiB
104 lines
3.3 KiB
# RUN: llc -mtriple=hexagon -run-pass pipeliner -debug-only=pipeliner %s -o /dev/null 2>&1 -pipeliner-experimental-cg=true | FileCheck %s
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# REQUIRES: asserts
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# Test that the loop carried dependence check correctly identifies a recurrence.
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# CHECK: Rec NodeSet
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# CHECK: Rec NodeSet
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# CHECK: Rec NodeSet
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# CHECK: Rec NodeSet
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# CHECK-NEXT: SU(4)
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# CHECK-NEXT: SU(6)
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--- |
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%struct.A = type { i16, i16 }
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define i32 @test(%struct.A* noalias nocapture %s, i16* noalias nocapture readonly %r, i32 %n) {
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entry:
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%cmp19 = icmp eq i32 %n, 2
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br i1 %cmp19, label %for.end, label %for.body.preheader
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for.body.preheader:
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%0 = add i32 %n, -2
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%cgep = getelementptr %struct.A, %struct.A* %s, i32 2, i32 1
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%scevgep1 = bitcast i16* %cgep to %struct.A*
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%cgep9 = getelementptr i16, i16* %r, i32 2
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br label %for.body
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for.body:
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%lsr.iv7 = phi i16* [ %cgep9, %for.body.preheader ], [ %cgep12, %for.body ]
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%lsr.iv2 = phi %struct.A* [ %scevgep1, %for.body.preheader ], [ %cgep11, %for.body ]
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%lsr.iv = phi i32 [ %0, %for.body.preheader ], [ %lsr.iv.next, %for.body ]
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%sum.020 = phi i32 [ %add7, %for.body ], [ 0, %for.body.preheader ]
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%lsr.iv24 = bitcast %struct.A* %lsr.iv2 to i16*
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%1 = load i16, i16* %lsr.iv7, align 2
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%conv = sext i16 %1 to i32
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%cgep10 = getelementptr i16, i16* %lsr.iv24, i32 -4
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%2 = load i16, i16* %cgep10, align 2
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%conv2 = sext i16 %2 to i32
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%add = add i16 %1, 10
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store i16 %add, i16* %lsr.iv24, align 2
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%add6 = add i32 %sum.020, %conv
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%add7 = add i32 %add6, %conv2
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%lsr.iv.next = add i32 %lsr.iv, -1
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%cmp = icmp eq i32 %lsr.iv.next, 0
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%cgep11 = getelementptr %struct.A, %struct.A* %lsr.iv2, i32 1
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%cgep12 = getelementptr i16, i16* %lsr.iv7, i32 1
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br i1 %cmp, label %for.end, label %for.body
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for.end:
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add7, %for.body ]
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ret i32 %sum.0.lcssa
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}
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...
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---
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name: test
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tracksRegLiveness: true
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body: |
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bb.0:
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successors: %bb.3, %bb.1
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liveins: $r0, $r1, $r2
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%14:intregs = COPY $r2
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%13:intregs = COPY $r1
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%12:intregs = COPY $r0
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%16:predregs = C2_cmpeqi %14, 2
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%15:intregs = A2_tfrsi 0
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J2_jumpt killed %16, %bb.3, implicit-def dead $pc
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J2_jump %bb.1, implicit-def dead $pc
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bb.1:
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successors: %bb.2
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%0:intregs = A2_addi %14, -2
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%1:intregs = A2_addi %12, 10
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%2:intregs = A2_addi %13, 4
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%17:intregs = A2_tfrsi 0
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%23:intregs = COPY %0
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J2_loop0r %bb.2, %23, implicit-def $lc0, implicit-def $sa0, implicit-def $usr
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bb.2 (address-taken):
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successors: %bb.3, %bb.2
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%3:intregs = PHI %2, %bb.1, %10, %bb.2
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%4:intregs = PHI %1, %bb.1, %9, %bb.2
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%6:intregs = PHI %17, %bb.1, %7, %bb.2
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%18:intregs, %10:intregs = L2_loadrh_pi %3, 2 :: (load 2 from %ir.lsr.iv7)
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%19:intregs = L2_loadrh_io %4, -8 :: (load 2 from %ir.cgep10)
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%20:intregs = A2_addi %18, 10
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S2_storerh_io %4, 0, killed %20 :: (store 2 into %ir.lsr.iv24)
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%7:intregs = M2_acci %19, %6, %18
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%9:intregs = A2_addi %4, 4
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ENDLOOP0 %bb.2, implicit-def $pc, implicit-def $lc0, implicit $sa0, implicit $lc0
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J2_jump %bb.3, implicit-def dead $pc
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bb.3:
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%11:intregs = PHI %15, %bb.0, %7, %bb.2
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$r0 = COPY %11
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PS_jmpret $r31, implicit-def dead $pc, implicit $r0
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...
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