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| author | Stefan Pintilie <stefanp@ca.ibm.com> | 2018-10-01 20:16:27 +0000 |
|---|---|---|
| committer | Stefan Pintilie <stefanp@ca.ibm.com> | 2018-10-01 20:16:27 +0000 |
| commit | 5d32a86f442071f940366dc962763c7e05d7715e (patch) | |
| tree | bd8ad771509f8a765e1195489c4a82fd4119cc3d /llvm/test/CodeGen/PowerPC | |
| parent | 22d4948a50879111f70780c744ee1390a5b33de3 (diff) | |
| download | bcm5719-llvm-5d32a86f442071f940366dc962763c7e05d7715e.tar.gz bcm5719-llvm-5d32a86f442071f940366dc962763c7e05d7715e.zip | |
[PowerPC] Folding XForm to DForm loads requires alignment for some DForm 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
Diffstat (limited to 'llvm/test/CodeGen/PowerPC')
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/p9-dform-load-alignment.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/p9-dform-load-alignment.ll b/llvm/test/CodeGen/PowerPC/p9-dform-load-alignment.ll new file mode 100644 index 00000000000..b672eef8740 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/p9-dform-load-alignment.ll @@ -0,0 +1,16 @@ +; 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 + +@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]] +} + |
