263bc7f905
In commit 2be0abb7fe72ed453 (D149893) the load store vectorized was reimplemented. One thing that can happen with the new LSV is that it can increase the align of alloca and global objects. However, the code comments indicate that the intention only was to increase alignment of alloca. Now we will use stripPointerCasts to analyse if the load/store really is accessing an alloca (same as getOrEnforceKnownAlignment is using). And then we only try to change the align if we find an alloca instruction. This way the code will match better with code comments, and we won't change alignment of non-stack variables to use the "StackAdjustedAlignment". Differential Revision: https://reviews.llvm.org/D152386
25 lines
1.2 KiB
LLVM
25 lines
1.2 KiB
LLVM
; RUN: opt -S -passes=load-store-vectorizer --mcpu=hawaii -mattr=+unaligned-access-mode,+unaligned-scratch-access,+max-private-element-size-16 < %s | FileCheck --match-full-lines %s
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target triple = "amdgcn--"
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target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5"
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@G = internal addrspace(5) global [8 x i16] undef, align 1
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; Verify that the alignment of the global remains at 1, even if we vectorize
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; the stores.
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;
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; CHECK: @G = internal addrspace(5) global [8 x i16] undef, align 1
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define void @private_store_2xi16_align2_not_alloca(ptr addrspace(5) %p, ptr addrspace(5) %r) {
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; CHECK: define void @private_store_2xi16_align2_not_alloca(ptr addrspace(5) [[P:%.*]], ptr addrspace(5) [[R:%.*]]) #0 {
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; CHECK-NEXT: [[GEP0:%.*]] = getelementptr i16, ptr addrspace(5) @G, i32 0
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; CHECK-NEXT: store <2 x i16> <i16 1, i16 2>, ptr addrspace(5) [[GEP0]], align 1
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; CHECK-NEXT: ret void
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;
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%gep0 = getelementptr i16, ptr addrspace(5) @G, i32 0
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%gep1 = getelementptr i16, ptr addrspace(5) @G, i32 1
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store i16 1, ptr addrspace(5) %gep0, align 1
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store i16 2, ptr addrspace(5) %gep1, align 1
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ret void
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}
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