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[PowerPC] Folding XForm to DForm loads requires alignment for some DF…
…orm loads. Going from XForm Load to DSForm Load requires that the immediate be 4 byte aligned. If we are not aligned we must leave the load as LDX (XForm). This bug is causing a compile-time failure in the benchmark h264ref. Differential Revision: https://reviews.llvm.org/D51988 llvm-svn: 343525
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; RUN: llc -mcpu=pwr9 -mtriple=powerpc64le-unknown-unknown \ | ||
; RUN: -verify-machineinstrs -ppc-asm-full-reg-names \ | ||
; RUN: -ppc-vsr-nums-as-vr < %s | FileCheck %s | ||
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@best8x8mode = external dso_local local_unnamed_addr global [4 x i16], align 2 | ||
define dso_local void @AlignDSForm() local_unnamed_addr { | ||
entry: | ||
%0 = load <4 x i16>, <4 x i16>* bitcast ([4 x i16]* @best8x8mode to <4 x i16>*), align 2 | ||
store <4 x i16> %0, <4 x i16>* undef, align 4 | ||
unreachable | ||
; CHECK-LABEL: AlignDSForm | ||
; CHECK: addis r{{[0-9]+}}, r{{[0-9]+}}, best8x8mode@toc@ha | ||
; CHECK: addi r[[REG:[0-9]+]], r{{[0-9]+}}, best8x8mode@toc@l | ||
; CHECK: ldx r{{[0-9]+}}, 0, r[[REG]] | ||
} | ||
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