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after it has finished all of its reassociations, because its habit of unlinking operands and holding them in a datastructure while working means that it's not easy to determine when an instruction is really dead until after all its regular work is done. rdar://9096268. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127424 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
1.8 KiB
LLVM
70 lines
1.8 KiB
LLVM
; RUN: opt -reassociate -disable-output %s
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; rdar://7507855
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define fastcc i32 @test1() nounwind {
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entry:
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%cond = select i1 undef, i32 1, i32 -1 ; <i32> [#uses=2]
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%sub889 = sub i32 undef, undef ; <i32> [#uses=1]
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%sub891 = sub i32 %sub889, %cond ; <i32> [#uses=0]
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%add896 = sub i32 0, %cond ; <i32> [#uses=0]
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ret i32 undef
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}
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; PR5981
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define i32 @test2() nounwind ssp {
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entry:
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%0 = load i32* undef, align 4
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%1 = mul nsw i32 undef, %0
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%2 = mul nsw i32 undef, %0
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%3 = add nsw i32 undef, %1
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%4 = add nsw i32 %3, %2
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%5 = add nsw i32 %4, 4
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%6 = shl i32 %0, 3
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%7 = add nsw i32 %5, %6
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br label %bb4.i9
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bb4.i9:
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%8 = add nsw i32 undef, %1
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ret i32 0
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}
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define i32 @test3(i32 %Arg, i32 %x1, i32 %x2, i32 %x3) {
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%A = mul i32 %x1, %Arg
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%B = mul i32 %Arg, %x2 ;; Part of add operation being factored, also used by C
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%C = mul i32 %x3, %B
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%D = add i32 %A, %B
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%E = add i32 %D, %C
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ret i32 %E
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}
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; rdar://9096268
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define void @x66303361ae3f602889d1b7d0f86e5455(i8* %arg) nounwind {
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_:
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br label %_33
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_33: ; preds = %_33, %_
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%tmp348 = load i8* %arg, align 1
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%tmp349 = lshr i8 %tmp348, 7
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%tmp350 = or i8 %tmp349, 42
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%tmp351 = add i8 %tmp350, -42
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%tmp352 = zext i8 %tmp351 to i32
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%tmp358 = add i32 %tmp352, -501049439
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%tmp359 = mul i32 %tmp358, %tmp358
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%tmp360 = mul i32 %tmp352, %tmp352
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%tmp361 = sub i32 %tmp359, %tmp360
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%tmp362 = mul i32 %tmp361, -920056735
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%tmp363 = add i32 %tmp362, 501049439
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%tmp364 = add i32 %tmp362, -2000262972
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%tmp365 = sub i32 %tmp363, %tmp364
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%tmp366 = sub i32 -501049439, %tmp362
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%tmp367 = add i32 %tmp365, %tmp366
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br label %_33
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}
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