mirror of
https://github.com/RPCS3/llvm.git
synced 2026-08-28 05:10:05 -04:00
Sam Parker
040fcc3883
Debug information can be, and was, corrupted when the runtime remainder loop was fully unrolled. This is because a !null node can be created instead of a unique one describing the loop. In this case, the original node gets incorrectly updated with the NewLoopID metadata. In the case when the remainder loop is going to be quickly fully unrolled, there isn't the need to add loop metadata for it anyway. Differential Revision: https://reviews.llvm.org/D37338 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312471 91177308-0d34-0410-b5e6-96231b3b80d8
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 = sub nsw i64 %wide.trip.count, %xtraiter
|
|
; 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 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
|
|
}
|