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cf8ee33937
The "null-pointer-is-valid" attribute needs to be checked by many pointer-related combines. To make the check more efficient, convert it from a string into an enum attribute. In the future, this attribute may be replaced with data layout properties. Differential Revision: https://reviews.llvm.org/D78862
35 lines
1.1 KiB
LLVM
35 lines
1.1 KiB
LLVM
; RUN: opt -globalopt -S < %s | FileCheck %s
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; CHECK: @Y
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; CHECK: section ".foo"
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%struct.xyz = type { double, i32 }
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@Y = internal global %struct.xyz* null ,section ".foo" ; <%struct.xyz**> [#uses=2]
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@numf2s = external global i32 ; <i32*> [#uses=1]
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define void @init_net() #0 {
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; CHECK-LABEL: init_net(
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; CHECK: load i32, i32* @numf2s
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; CHECK: call i8* @malloc
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; CHECK: store %struct.xyz* {{.*}}, %struct.xyz** @Y
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entry:
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%0 = load i32, i32* @numf2s, align 4 ; <i32> [#uses=1]
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%mallocsize2 = shl i32 %0, 4 ; <i32> [#uses=1]
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%malloccall3 = tail call i8* @malloc(i32 %mallocsize2) ; <i8*> [#uses=1]
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%1 = bitcast i8* %malloccall3 to %struct.xyz* ; <%struct.xyz*> [#uses=1]
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store %struct.xyz* %1, %struct.xyz** @Y, align 8
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ret void
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}
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define %struct.xyz* @load_train() #0 {
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; CHECK-LABEL: load_train(
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; CHECK: load %struct.xyz*, %struct.xyz** @Y
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entry:
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%0 = load %struct.xyz*, %struct.xyz** @Y, align 8 ; <%struct.xyz*> [#uses=0]
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ret %struct.xyz* %0
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}
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declare noalias i8* @malloc(i32)
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attributes #0 = { null_pointer_is_valid }
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