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0b0803ae15
that is also a subtract. This implements PR2047 and Transforms/Reassociate/subtest2.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47241 91177308-0d34-0410-b5e6-96231b3b80d8
14 lines
381 B
LLVM
14 lines
381 B
LLVM
; With sub reassociation, constant folding can eliminate the uses of %a.
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;
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; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | grep %a | count 1
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; PR2047
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define i32 @test(i32 %a, i32 %b, i32 %c) nounwind {
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entry:
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%tmp3 = sub i32 %a, %b ; <i32> [#uses=1]
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%tmp5 = sub i32 %tmp3, %c ; <i32> [#uses=1]
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%tmp7 = sub i32 %tmp5, %a ; <i32> [#uses=1]
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ret i32 %tmp7
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}
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