51 lines
1.6 KiB
LLVM
51 lines
1.6 KiB
LLVM
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; RUN: opt -S -instcombine < %s | FileCheck %s
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; Instcombine should preserve metadata and alignment while
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; folding a bitcast into a store.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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%struct.A = type { i32 (...)** }
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@G = external constant [5 x i8*]
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; CHECK-LABEL: @foo
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; CHECK: store i32 %x, i32* %{{.*}}, align 16, !noalias !0, !llvm.access.group !1
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define void @foo(i32 %x, float* %p) nounwind {
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entry:
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%x.cast = bitcast i32 %x to float
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store float %x.cast, float* %p, align 16, !noalias !0, !llvm.access.group !1
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ret void
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}
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; Check instcombine doesn't try and fold the following bitcast into the store.
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; This transformation would not be safe since we would need to use addrspacecast
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; and addrspacecast is not guaranteed to be a no-op cast.
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; CHECK-LABEL: @bar
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; CHECK: %cast = bitcast i8** %b to i8 addrspace(1)**
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; CHECK: store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
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define void @bar(i8 addrspace(1)* %a, i8** %b) nounwind {
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entry:
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%cast = bitcast i8** %b to i8 addrspace(1)**
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store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
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ret void
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}
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; Check that we don't combine the bitcast into the store. This would create a
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; bitcast of the swifterror which is invalid.
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; CHECK-LABEL; @swifterror_store
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; CHECK: bitcast i64
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; CHECK: store %swift.error
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%swift.error = type opaque
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define void @swifterror_store(i64* %x, %swift.error** swifterror %err) {
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entry:
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%casted = bitcast i64* %x to %swift.error*
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store %swift.error* %casted, %swift.error** %err
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ret void
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}
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!0 = !{!0}
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!1 = !{}
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