llvm-6502/test/Transforms/IndVarSimplify/iv-fold.ll
Stephen Lin 39f4e8d9cc Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.
This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:42:54 +00:00

57 lines
1.8 KiB
LLVM

; RUN: opt < %s -indvars -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n32:64"
; Indvars should be able to fold IV increments into shr when low bits are zero.
;
; CHECK-LABEL: @foldIncShr(
; CHECK: shr.1 = lshr i32 %0, 5
define i32 @foldIncShr(i32* %bitmap, i32 %bit_addr, i32 %nbits) nounwind {
entry:
br label %while.body
while.body:
%0 = phi i32 [ 0, %entry ], [ %inc.2, %while.body ]
%shr = lshr i32 %0, 5
%arrayidx = getelementptr inbounds i32* %bitmap, i32 %shr
%tmp6 = load i32* %arrayidx, align 4
%inc.1 = add i32 %0, 1
%shr.1 = lshr i32 %inc.1, 5
%arrayidx.1 = getelementptr inbounds i32* %bitmap, i32 %shr.1
%tmp6.1 = load i32* %arrayidx.1, align 4
%inc.2 = add i32 %inc.1, 1
%exitcond.3 = icmp eq i32 %inc.2, 128
br i1 %exitcond.3, label %while.end, label %while.body
while.end:
%r = add i32 %tmp6, %tmp6.1
ret i32 %r
}
; Invdars should not fold an increment into shr unless 2^shiftBits is
; a multiple of the recurrence step.
;
; CHECK-LABEL: @noFoldIncShr(
; CHECK: shr.1 = lshr i32 %inc.1, 5
define i32 @noFoldIncShr(i32* %bitmap, i32 %bit_addr, i32 %nbits) nounwind {
entry:
br label %while.body
while.body:
%0 = phi i32 [ 0, %entry ], [ %inc.3, %while.body ]
%shr = lshr i32 %0, 5
%arrayidx = getelementptr inbounds i32* %bitmap, i32 %shr
%tmp6 = load i32* %arrayidx, align 4
%inc.1 = add i32 %0, 1
%shr.1 = lshr i32 %inc.1, 5
%arrayidx.1 = getelementptr inbounds i32* %bitmap, i32 %shr.1
%tmp6.1 = load i32* %arrayidx.1, align 4
%inc.3 = add i32 %inc.1, 2
%exitcond.3 = icmp eq i32 %inc.3, 96
br i1 %exitcond.3, label %while.end, label %while.body
while.end:
%r = add i32 %tmp6, %tmp6.1
ret i32 %r
}