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https://github.com/c64scene-ar/llvm-6502.git
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43 lines
1.5 KiB
LLVM
43 lines
1.5 KiB
LLVM
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; Test to make sure that load from the same address as a store and appears after the store prevents the store from being sunk
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; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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%struct.node = type { i32, %struct.node*, %struct.node*, %struct.node*, i32, i32, i32, i32 }
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; Function Attrs: nounwind uwtable
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define void @sink_store(%struct.node* nocapture %r, i32 %index) {
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entry:
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%node.0.in16 = getelementptr inbounds %struct.node* %r, i64 0, i32 2
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%node.017 = load %struct.node** %node.0.in16, align 8
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%index.addr = alloca i32, align 4
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store i32 %index, i32* %index.addr, align 4
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%0 = load i32* %index.addr, align 4
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%cmp = icmp slt i32 %0, 0
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br i1 %cmp, label %if.then, label %if.else
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; CHECK: if.then
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if.then: ; preds = %entry
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%1 = load i32* %index.addr, align 4
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%p1 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6
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; CHECK: store i32
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store i32 %1, i32* %p1, align 4
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%p2 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6
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; CHECK: load i32*
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%barrier = load i32 * %p2, align 4
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br label %if.end
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; CHECK: if.else
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if.else: ; preds = %entry
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%2 = load i32* %index.addr, align 4
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%add = add nsw i32 %2, 1
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%p3 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6
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; CHECK: store i32
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store i32 %add, i32* %p3, align 4
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br label %if.end
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; CHECK: if.end
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if.end: ; preds = %if.else, %if.then
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; CHECK-NOT: store
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ret void
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}
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