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llvm-mirror/test/CodeGen/X86/fold-and-shift.ll
Stephen Lin 7e501cf4c3 Mass update to CodeGen tests to use CHECK-LABEL for labels corresponding to function definitions for more informative error messages. No functionality change and all updated tests passed locally.
This update was done with the following bash script:

  find test/CodeGen -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc.*debug" $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
      sed -i '' "s/;\(.*\)-LABEL-LABEL:/;\1-LABEL:/" $TEMP
      sed -i '' "s/;\(.*\)-NEXT-LABEL:/;\1-NEXT:/" $TEMP
      sed -i '' "s/;\(.*\)-NOT-LABEL:/;\1-NOT:/" $TEMP
      sed -i '' "s/;\(.*\)-DAG-LABEL:/;\1-DAG:/" $TEMP
      mv $TEMP $NAME
    fi
  done

llvm-svn: 186280
2013-07-14 06:24:09 +00:00

78 lines
2.1 KiB
LLVM

; RUN: llc < %s -march=x86 | FileCheck %s
define i32 @t1(i8* %X, i32 %i) {
; CHECK-LABEL: t1:
; CHECK-NOT: and
; CHECK: movzbl
; CHECK: movl (%{{...}},%{{...}},4),
; CHECK: ret
entry:
%tmp2 = shl i32 %i, 2
%tmp4 = and i32 %tmp2, 1020
%tmp7 = getelementptr i8* %X, i32 %tmp4
%tmp78 = bitcast i8* %tmp7 to i32*
%tmp9 = load i32* %tmp78
ret i32 %tmp9
}
define i32 @t2(i16* %X, i32 %i) {
; CHECK-LABEL: t2:
; CHECK-NOT: and
; CHECK: movzwl
; CHECK: movl (%{{...}},%{{...}},4),
; CHECK: ret
entry:
%tmp2 = shl i32 %i, 1
%tmp4 = and i32 %tmp2, 131070
%tmp7 = getelementptr i16* %X, i32 %tmp4
%tmp78 = bitcast i16* %tmp7 to i32*
%tmp9 = load i32* %tmp78
ret i32 %tmp9
}
define i32 @t3(i16* %i.ptr, i32* %arr) {
; This case is tricky. The lshr followed by a gep will produce a lshr followed
; by an and to remove the low bits. This can be simplified by doing the lshr by
; a greater constant and using the addressing mode to scale the result back up.
; To make matters worse, because of the two-phase zext of %i and their reuse in
; the function, the DAG can get confusing trying to re-use both of them and
; prevent easy analysis of the mask in order to match this.
; CHECK-LABEL: t3:
; CHECK-NOT: and
; CHECK: shrl
; CHECK: addl (%{{...}},%{{...}},4),
; CHECK: ret
entry:
%i = load i16* %i.ptr
%i.zext = zext i16 %i to i32
%index = lshr i32 %i.zext, 11
%val.ptr = getelementptr inbounds i32* %arr, i32 %index
%val = load i32* %val.ptr
%sum = add i32 %val, %i.zext
ret i32 %sum
}
define i32 @t4(i16* %i.ptr, i32* %arr) {
; A version of @t3 that has more zero extends and more re-use of intermediate
; values. This exercise slightly different bits of canonicalization.
; CHECK-LABEL: t4:
; CHECK-NOT: and
; CHECK: shrl
; CHECK: addl (%{{...}},%{{...}},4),
; CHECK: ret
entry:
%i = load i16* %i.ptr
%i.zext = zext i16 %i to i32
%index = lshr i32 %i.zext, 11
%index.zext = zext i32 %index to i64
%val.ptr = getelementptr inbounds i32* %arr, i64 %index.zext
%val = load i32* %val.ptr
%sum.1 = add i32 %val, %i.zext
%sum.2 = add i32 %sum.1, %index
ret i32 %sum.2
}