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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
122 lines
2.6 KiB
LLVM
122 lines
2.6 KiB
LLVM
; RUN: opt < %s -S -early-cse | FileCheck %s
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; CHECK-LABEL: @test1(
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define void @test1(i8 %V, i32 *%P) {
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%A = bitcast i64 42 to double ;; dead
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%B = add i32 4, 19 ;; constant folds
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store i32 %B, i32* %P
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; CHECK-NEXT: store i32 23, i32* %P
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%C = zext i8 %V to i32
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%D = zext i8 %V to i32 ;; CSE
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store volatile i32 %C, i32* %P
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store volatile i32 %D, i32* %P
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; CHECK-NEXT: %C = zext i8 %V to i32
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; CHECK-NEXT: store volatile i32 %C
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; CHECK-NEXT: store volatile i32 %C
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%E = add i32 %C, %C
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%F = add i32 %C, %C
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store volatile i32 %E, i32* %P
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store volatile i32 %F, i32* %P
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; CHECK-NEXT: %E = add i32 %C, %C
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; CHECK-NEXT: store volatile i32 %E
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; CHECK-NEXT: store volatile i32 %E
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%G = add nuw i32 %C, %C ;; not a CSE with E
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store volatile i32 %G, i32* %P
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; CHECK-NEXT: %G = add nuw i32 %C, %C
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; CHECK-NEXT: store volatile i32 %G
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ret void
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}
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;; Simple load value numbering.
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; CHECK-LABEL: @test2(
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define i32 @test2(i32 *%P) {
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%V1 = load i32* %P
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%V2 = load i32* %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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; CHECK: ret i32 0
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}
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;; Cross block load value numbering.
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; CHECK-LABEL: @test3(
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define i32 @test3(i32 *%P, i1 %Cond) {
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%V1 = load i32* %P
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br i1 %Cond, label %T, label %F
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T:
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store i32 4, i32* %P
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ret i32 42
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F:
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%V2 = load i32* %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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; CHECK: F:
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; CHECK: ret i32 0
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}
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;; Cross block load value numbering stops when stores happen.
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; CHECK-LABEL: @test4(
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define i32 @test4(i32 *%P, i1 %Cond) {
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%V1 = load i32* %P
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br i1 %Cond, label %T, label %F
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T:
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ret i32 42
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F:
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; Clobbers V1
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store i32 42, i32* %P
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%V2 = load i32* %P
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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; CHECK: F:
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; CHECK: ret i32 %Diff
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}
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declare i32 @func(i32 *%P) readonly
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;; Simple call CSE'ing.
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; CHECK-LABEL: @test5(
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define i32 @test5(i32 *%P) {
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%V1 = call i32 @func(i32* %P)
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%V2 = call i32 @func(i32* %P)
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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; CHECK: ret i32 0
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}
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;; Trivial Store->load forwarding
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; CHECK-LABEL: @test6(
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define i32 @test6(i32 *%P) {
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store i32 42, i32* %P
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%V1 = load i32* %P
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ret i32 %V1
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; CHECK: ret i32 42
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}
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;; Trivial dead store elimination.
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; CHECK-LABEL: @test7(
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define void @test7(i32 *%P) {
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store i32 42, i32* %P
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store i32 45, i32* %P
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ret void
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; CHECK-NEXT: store i32 45
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; CHECK-NEXT: ret void
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}
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;; Readnone functions aren't invalidated by stores.
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; CHECK-LABEL: @test8(
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define i32 @test8(i32 *%P) {
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%V1 = call i32 @func(i32* %P) readnone
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store i32 4, i32* %P
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%V2 = call i32 @func(i32* %P) readnone
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%Diff = sub i32 %V1, %V2
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ret i32 %Diff
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; CHECK: ret i32 0
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}
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