0e71a6e755
We shouldn't split the store when it is volatile. Differential Revision: https://reviews.llvm.org/D61169 llvm-svn: 360228
18 lines
479 B
LLVM
18 lines
479 B
LLVM
; Test that CodeGenPrepare respect the volatile flag when splitting a store.
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;
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; RUN: opt -S -codegenprepare -force-split-store < %s | FileCheck %s
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define void @fun(i16* %Src, i16* %Dst) {
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; CHECK: store volatile i16 %8, i16* %Dst
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%1 = load i16, i16* %Src
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%2 = trunc i16 %1 to i8
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%3 = lshr i16 %1, 8
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%4 = trunc i16 %3 to i8
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%5 = zext i8 %2 to i16
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%6 = zext i8 %4 to i16
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%7 = shl nuw i16 %6, 8
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%8 = or i16 %7, %5
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store volatile i16 %8, i16* %Dst
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ret void
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}
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