117921e071
Currently, the alignment of toc-data symbol might be changed during instcombine ``` IC: Visiting: %global = alloca %struct.widget, align 8 Found alloca equal to global: %global = alloca %struct.widget, align 8 memcpy = call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %global, ptr align 1 @global, i64 3, i1 false) ``` The `alloca` is created with `PrefAlign` which is 8 and after IC, the alignment of `@global` is enforced into `8`, same as the `alloca`. This is not expected, since toc-data symbol has the same alignment as toc entry and should not be increased during optimizations. --------- Co-authored-by: Sean Fertile <sd.fertile@gmail.com> Co-authored-by: Eli Friedman <efriedma@quicinc.com>
25 lines
920 B
LLVM
25 lines
920 B
LLVM
; RUN: opt -S -passes='default<O3>' < %s | FileCheck %s
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target datalayout = "E-m:a-p:32:32-Fi32-i64:64-n32"
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target triple = "powerpc-ibm-aix7.2.0.0"
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%struct.widget = type { i8, i8, i8 }
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; CHECK: @global = {{.*}}constant %struct.widget { i8 4, i8 0, i8 0 }, align 4 #0
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@global = constant %struct.widget { i8 4, i8 0, i8 0 }, align 4 #0
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define void @baz() #1 {
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bb:
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call void @snork(ptr @global)
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ret void
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}
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define void @snork(ptr byval(%struct.widget) %arg) #1 {
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bb:
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%load = load volatile ptr, ptr null, align 4
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ret void
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}
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attributes #0 = { "toc-data" }
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attributes #1 = { "target-cpu"="pwr7" "target-features"="+altivec,+bpermd,+extdiv,+isa-v206-instructions,+vsx,-aix-shared-lib-tls-model-opt,-aix-small-local-dynamic-tls,-aix-small-local-exec-tls,-crbits,-crypto,-direct-move,-htm,-isa-v207-instructions,-isa-v30-instructions,-power8-vector,-power9-vector,-privileged,-quadword-atomics,-rop-protect,-spe" }
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