75 lines
2.6 KiB
LLVM
75 lines
2.6 KiB
LLVM
|
; RUN: opt < %s -S -loop-unroll -unroll-runtime=true -unroll-count=4 -unroll-remainder -instcombine | FileCheck %s
|
||
|
|
|
||
|
|
; CHECK-LABEL: unroll
|
||
|
|
define i32 @unroll(i32* nocapture readonly %a, i32* nocapture readonly %b, i32 %N) local_unnamed_addr #0 {
|
||
|
|
entry:
|
||
|
|
%cmp9 = icmp eq i32 %N, 0
|
||
|
|
br i1 %cmp9, label %for.cond.cleanup, label %for.body.lr.ph
|
||
|
|
|
||
|
|
for.body.lr.ph:
|
||
|
|
%wide.trip.count = zext i32 %N to i64
|
||
|
|
br label %for.body
|
||
|
|
|
||
|
|
for.cond.cleanup:
|
||
|
|
%c.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
|
||
|
|
ret i32 %c.0.lcssa
|
||
|
|
|
||
|
|
; CHECK-LABEL: for.body.lr.ph
|
||
|
|
; CHECK: [[COUNT:%[a-z.0-9]+]] = add nsw i64 %wide.trip.count, -1
|
||
|
|
; CHECK: %xtraiter = and i64 %wide.trip.count, 3
|
||
|
|
; CHECK: [[CMP:%[a-z.0-9]+]] = icmp ult i64 [[COUNT]], 3
|
||
|
|
; CHECK: br i1 [[CMP]], label %[[CLEANUP:.*]], label %for.body.lr.ph.new
|
||
|
|
|
||
|
|
; CHECK-LABEL: for.body.lr.ph.new:
|
||
|
|
; CHECK: %unroll_iter = and i64 %wide.trip.count, 4294967292
|
||
|
|
; CHECK: br label %for.body
|
||
|
|
|
||
|
|
; CHECK: [[CLEANUP]]:
|
||
|
|
; CHECK: [[MOD:%[a-z.0-9]+]] = icmp eq i64 %xtraiter, 0
|
||
|
|
; CHECK: br i1 [[MOD]], label %[[EXIT:.*]], label %[[EPIL_PEEL0_PRE:.*]]
|
||
|
|
|
||
|
|
; CHECK: [[EPIL_PEEL0_PRE]]:
|
||
|
|
; CHECK: br label %[[EPIL_PEEL0:.*]]
|
||
|
|
|
||
|
|
; CHECK: [[EPIL_PEEL0]]:
|
||
|
|
; CHECK: [[PEEL_CMP0:%[a-z.0-9]+]] = icmp eq i64 %xtraiter, 1
|
||
|
|
; CHECK: br i1 [[PEEL_CMP0]], label %[[EPIL_EXIT:.*]], label %[[EPIL_PEEL1:.*]]
|
||
|
|
|
||
|
|
; CHECK: [[EPIL_EXIT]]:
|
||
|
|
; CHECK: br label %[[EXIT]]
|
||
|
|
|
||
|
|
; CHECK: [[EXIT]]:
|
||
|
|
; CHECK: ret i32
|
||
|
|
|
||
|
|
; CHECK-LABEL: for.body:
|
||
|
|
; CHECK: [[INDVAR0:%[a-z.0-9]+]] = phi i64 [ 0, %for.body.lr.ph
|
||
|
|
; CHECK: [[ITER:%[a-z.0-9]+]] = phi i64 [ %unroll_iter
|
||
|
|
; CHECK: or i64 [[INDVAR0]], 1
|
||
|
|
; CHECK: or i64 [[INDVAR0]], 2
|
||
|
|
; CHECK: or i64 [[INDVAR0]], 3
|
||
|
|
; CHECK: add nuw nsw i64 [[INDVAR0]], 4
|
||
|
|
; CHECK: [[SUB:%[a-z.0-9]+]] = add i64 [[ITER]], -4
|
||
|
|
; CHECK: [[ITER_CMP:%[a-z.0-9]+]] = icmp eq i64 [[SUB]], 0
|
||
|
|
; CHECK: br i1 [[ITER_CMP]], label %[[LOOP_EXIT:.*]], label %for.body
|
||
|
|
|
||
|
|
; CHECK: [[EPIL_PEEL1]]:
|
||
|
|
; CHECK: [[PEEL_CMP1:%[a-z.0-9]+]] = icmp eq i64 %xtraiter, 2
|
||
|
|
; CHECK: br i1 [[PEEL_CMP1]], label %[[EPIL_EXIT]], label %[[EPIL_PEEL2:.*]]
|
||
|
|
|
||
|
|
; CHECK: [[EPIL_PEEL2]]:
|
||
|
|
; CHECK: br label %[[EXIT]]
|
||
|
|
|
||
|
|
for.body:
|
||
|
|
%indvars.iv = phi i64 [ 0, %for.body.lr.ph ], [ %indvars.iv.next, %for.body ]
|
||
|
|
%c.010 = phi i32 [ 0, %for.body.lr.ph ], [ %add, %for.body ]
|
||
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
|
||
|
|
%0 = load i32, i32* %arrayidx, align 4
|
||
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
|
||
|
|
%1 = load i32, i32* %arrayidx2, align 4
|
||
|
|
%mul = mul nsw i32 %1, %0
|
||
|
|
%add = add nsw i32 %mul, %c.010
|
||
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
|
||
|
|
%exitcond = icmp eq i64 %indvars.iv.next, %wide.trip.count
|
||
|
|
br i1 %exitcond, label %for.cond.cleanup, label %for.body
|
||
|
|
}
|