f89f7da999
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
41 lines
998 B
LLVM
41 lines
998 B
LLVM
; RUN: opt < %s -globalopt -S | FileCheck %s
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; CHECK: global
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@G = internal global void ()* null ; <void ()**> [#uses=2]
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define internal void @Actual() {
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; CHECK-LABEL: Actual(
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ret void
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}
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define void @init() {
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; CHECK-LABEL: init(
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; CHECK: store void ()* @Actual, void ()** @G
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store void ()* @Actual, void ()** @G
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ret void
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}
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define void @doit() #0 {
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; CHECK-LABEL: doit(
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%FP = load void ()*, void ()** @G ; <void ()*> [#uses=2]
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; CHECK: %FP = load void ()*, void ()** @G
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%CC = icmp eq void ()* %FP, null ; <i1> [#uses=1]
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; CHECK: %CC = icmp eq void ()* %FP, null
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br i1 %CC, label %isNull, label %DoCall
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; CHECK: br i1 %CC, label %isNull, label %DoCall
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DoCall: ; preds = %0
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; CHECK: DoCall:
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; CHECK: call void %FP()
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; CHECK: ret void
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call void %FP( )
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ret void
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isNull: ; preds = %0
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; CHECK: isNull:
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; CHECK: ret void
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ret void
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}
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attributes #0 = { null_pointer_is_valid }
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