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e106c93d00
splitMergedValStore will split a store into two if target prefers this, or if -force-split-store is passed. This patch adds the missing handling for endianness in this function along with a test case. Review: Eli Friedman https://reviews.llvm.org/D44396 llvm-svn: 327375
23 lines
609 B
LLVM
23 lines
609 B
LLVM
; Test that CodeGenPrepare respects endianness when splitting a store.
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;
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; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -force-split-store < %s | FileCheck %s
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define void @fun(i16* %Src, i16* %Dst) {
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; CHECK-LABEL: # %bb.0:
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; CHECK: lh %r0, 0(%r2)
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; CHECK-NEXT: stc %r0, 1(%r3)
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; CHECK-NEXT: srl %r0, 8
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; CHECK-NEXT: stc %r0, 0(%r3)
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; CHECK-NEXT: br %r14
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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 i16 %8, i16* %Dst
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ret void
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}
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