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39f4e8d9cc
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
135 lines
3.2 KiB
LLVM
135 lines
3.2 KiB
LLVM
; This test makes sure that div instructions are properly eliminated.
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @test1(i32 %A) {
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%B = sdiv i32 %A, 1 ; <i32> [#uses=1]
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ret i32 %B
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret i32 %A
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}
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define i32 @test2(i32 %A) {
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; => Shift
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%B = udiv i32 %A, 8 ; <i32> [#uses=1]
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ret i32 %B
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: lshr i32 %A, 3
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}
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define i32 @test3(i32 %A) {
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; => 0, don't need to keep traps
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%B = sdiv i32 0, %A ; <i32> [#uses=1]
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ret i32 %B
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: ret i32 0
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}
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define i32 @test4(i32 %A) {
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; 0-A
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%B = sdiv i32 %A, -1 ; <i32> [#uses=1]
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ret i32 %B
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: sub i32 0, %A
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}
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define i32 @test5(i32 %A) {
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%B = udiv i32 %A, -16 ; <i32> [#uses=1]
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%C = udiv i32 %B, -4 ; <i32> [#uses=1]
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ret i32 %C
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: ret i32 0
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}
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define i1 @test6(i32 %A) {
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%B = udiv i32 %A, 123 ; <i32> [#uses=1]
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; A < 123
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%C = icmp eq i32 %B, 0 ; <i1> [#uses=1]
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ret i1 %C
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: icmp ult i32 %A, 123
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}
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define i1 @test7(i32 %A) {
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%B = udiv i32 %A, 10 ; <i32> [#uses=1]
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; A >= 20 && A < 30
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%C = icmp eq i32 %B, 2 ; <i1> [#uses=1]
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ret i1 %C
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: add i32 %A, -20
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; CHECK-NEXT: icmp ult i32
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}
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define i1 @test8(i8 %A) {
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%B = udiv i8 %A, 123 ; <i8> [#uses=1]
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; A >= 246
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%C = icmp eq i8 %B, 2 ; <i1> [#uses=1]
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ret i1 %C
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: icmp ugt i8 %A, -11
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}
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define i1 @test9(i8 %A) {
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%B = udiv i8 %A, 123 ; <i8> [#uses=1]
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; A < 246
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%C = icmp ne i8 %B, 2 ; <i1> [#uses=1]
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ret i1 %C
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: icmp ult i8 %A, -10
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}
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define i32 @test10(i32 %X, i1 %C) {
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%V = select i1 %C, i32 64, i32 8 ; <i32> [#uses=1]
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%R = udiv i32 %X, %V ; <i32> [#uses=1]
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ret i32 %R
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: select i1 %C, i32 6, i32 3
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; CHECK-NEXT: lshr i32 %X
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}
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define i32 @test11(i32 %X, i1 %C) {
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%A = select i1 %C, i32 1024, i32 32 ; <i32> [#uses=1]
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%B = udiv i32 %X, %A ; <i32> [#uses=1]
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ret i32 %B
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: select i1 %C, i32 10, i32 5
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; CHECK-NEXT: lshr i32 %X
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}
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; PR2328
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define i32 @test12(i32 %x) nounwind {
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%tmp3 = udiv i32 %x, %x ; 1
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ret i32 %tmp3
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: ret i32 1
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}
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define i32 @test13(i32 %x) nounwind {
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%tmp3 = sdiv i32 %x, %x ; 1
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ret i32 %tmp3
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: ret i32 1
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}
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define i32 @test14(i8 %x) nounwind {
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%zext = zext i8 %x to i32
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%div = udiv i32 %zext, 257 ; 0
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ret i32 %div
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; CHECK-LABEL: @test14(
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; CHECK-NEXT: ret i32 0
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}
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; PR9814
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define i32 @test15(i32 %a, i32 %b) nounwind {
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%shl = shl i32 1, %b
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%div = lshr i32 %shl, 2
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%div2 = udiv i32 %a, %div
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ret i32 %div2
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; CHECK-LABEL: @test15(
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; CHECK-NEXT: add i32 %b, -2
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; CHECK-NEXT: lshr i32 %a,
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; CHECK-NEXT: ret i32
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}
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