diff options
Diffstat (limited to 'test/Transforms/InstMerge/st_sink_with_barrier.ll')
| -rw-r--r-- | test/Transforms/InstMerge/st_sink_with_barrier.ll | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/Transforms/InstMerge/st_sink_with_barrier.ll b/test/Transforms/InstMerge/st_sink_with_barrier.ll new file mode 100644 index 0000000..d4efaa7 --- /dev/null +++ b/test/Transforms/InstMerge/st_sink_with_barrier.ll @@ -0,0 +1,42 @@ +; Test to make sure that load from the same address as a store and appears after the store prevents the store from being sunk +; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s +target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128" + +%struct.node = type { i32, %struct.node*, %struct.node*, %struct.node*, i32, i32, i32, i32 } + +; Function Attrs: nounwind uwtable +define void @sink_store(%struct.node* nocapture %r, i32 %index) { +entry: + %node.0.in16 = getelementptr inbounds %struct.node* %r, i64 0, i32 2 + %node.017 = load %struct.node** %node.0.in16, align 8 + %index.addr = alloca i32, align 4 + store i32 %index, i32* %index.addr, align 4 + %0 = load i32* %index.addr, align 4 + %cmp = icmp slt i32 %0, 0 + br i1 %cmp, label %if.then, label %if.else + +; CHECK: if.then +if.then: ; preds = %entry + %1 = load i32* %index.addr, align 4 + %p1 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6 + ; CHECK: store i32 + store i32 %1, i32* %p1, align 4 + %p2 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6 + ; CHECK: load i32* + %barrier = load i32 * %p2, align 4 + br label %if.end + +; CHECK: if.else +if.else: ; preds = %entry + %2 = load i32* %index.addr, align 4 + %add = add nsw i32 %2, 1 + %p3 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6 + ; CHECK: store i32 + store i32 %add, i32* %p3, align 4 + br label %if.end + +; CHECK: if.end +if.end: ; preds = %if.else, %if.then +; CHECK-NOT: store + ret void +} |