21 lines
821 B
LLVM
21 lines
821 B
LLVM
; RUN: llc < %s -march=x86 -mcpu=generic | \
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; RUN: grep shld | count 1
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;
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; Check that the isel does not fold the shld, which already folds a load
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; and has two uses, into a store.
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@A = external global i32 ; <i32*> [#uses=2]
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define i32 @test5(i32 %B, i8 %C) {
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%tmp.1 = load i32, i32* @A ; <i32> [#uses=1]
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%shift.upgrd.1 = zext i8 %C to i32 ; <i32> [#uses=1]
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%tmp.2 = shl i32 %tmp.1, %shift.upgrd.1 ; <i32> [#uses=1]
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%tmp.3 = sub i8 32, %C ; <i8> [#uses=1]
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%shift.upgrd.2 = zext i8 %tmp.3 to i32 ; <i32> [#uses=1]
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%tmp.4 = lshr i32 %B, %shift.upgrd.2 ; <i32> [#uses=1]
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%tmp.5 = or i32 %tmp.4, %tmp.2 ; <i32> [#uses=2]
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store i32 %tmp.5, i32* @A
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ret i32 %tmp.5
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}
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