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llvm-mirror/test/Transforms/InstCombine/nsw.ll
Stephen Lin cf082ae903 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

llvm-svn: 186268
2013-07-14 01:42:54 +00:00

84 lines
1.7 KiB
LLVM

; RUN: opt < %s -instcombine -S | FileCheck %s
; CHECK-LABEL: @sub1(
; CHECK: %y = sub i32 0, %x
; CHECK: %z = sdiv i32 %y, 337
; CHECK: ret i32 %z
define i32 @sub1(i32 %x) {
%y = sub i32 0, %x
%z = sdiv i32 %y, 337
ret i32 %z
}
; CHECK-LABEL: @sub2(
; CHECK: %z = sdiv i32 %x, -337
; CHECK: ret i32 %z
define i32 @sub2(i32 %x) {
%y = sub nsw i32 0, %x
%z = sdiv i32 %y, 337
ret i32 %z
}
; CHECK-LABEL: @shl_icmp(
; CHECK: %B = icmp eq i64 %X, 0
; CHECK: ret i1 %B
define i1 @shl_icmp(i64 %X) nounwind {
%A = shl nuw i64 %X, 2 ; X/4
%B = icmp eq i64 %A, 0
ret i1 %B
}
; CHECK-LABEL: @shl1(
; CHECK: %B = shl nuw nsw i64 %A, 8
; CHECK: ret i64 %B
define i64 @shl1(i64 %X, i64* %P) nounwind {
%A = and i64 %X, 312
store i64 %A, i64* %P ; multiple uses of A.
%B = shl i64 %A, 8
ret i64 %B
}
; CHECK-LABEL: @preserve1(
; CHECK: add nsw i32 %x, 5
define i32 @preserve1(i32 %x) nounwind {
%add = add nsw i32 %x, 2
%add3 = add nsw i32 %add, 3
ret i32 %add3
}
; CHECK-LABEL: @nopreserve1(
; CHECK: add i8 %x, -126
define i8 @nopreserve1(i8 %x) nounwind {
%add = add nsw i8 %x, 127
%add3 = add nsw i8 %add, 3
ret i8 %add3
}
; CHECK-LABEL: @nopreserve2(
; CHECK: add i8 %x, 3
define i8 @nopreserve2(i8 %x) nounwind {
%add = add i8 %x, 1
%add3 = add nsw i8 %add, 2
ret i8 %add3
}
; CHECK-LABEL: @nopreserve3(
; CHECK: add i8 %A, %B
; CHECK: add i8
define i8 @nopreserve3(i8 %A, i8 %B) nounwind {
%x = add i8 %A, 10
%y = add i8 %B, 10
%add = add nsw i8 %x, %y
ret i8 %add
}
; CHECK-LABEL: @nopreserve4(
; CHECK: add i8 %A, %B
; CHECK: add i8
define i8 @nopreserve4(i8 %A, i8 %B) nounwind {
%x = add nsw i8 %A, 10
%y = add nsw i8 %B, 10
%add = add nsw i8 %x, %y
ret i8 %add
}