mirror of
https://github.com/c64scene-ar/llvm-6502.git
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d94715e273
Merges equivalent loads on both sides of a hammock/diamond and hoists into into the header. Merges equivalent stores on both sides of a hammock/diamond and sinks it to the footer. Can enable if conversion and tolerate better load misses and store operand latencies. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213396 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
3.5 KiB
LLVM
85 lines
3.5 KiB
LLVM
; Tests to make sure that loads and stores in a diamond get merged
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; Loads are hoisted into the header. Stores sunks into the footer.
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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 { i64, %struct.node*, %struct.node*, %struct.node*, i64, %struct.arc*, i64, i64, i64 }
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%struct.arc = type { i64, i64, i64 }
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define i64 @foo(%struct.node* nocapture readonly %r) nounwind {
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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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%tobool18 = icmp eq %struct.node* %node.017, null
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br i1 %tobool18, label %while.end, label %while.body.preheader
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; CHECK-LABEL: while.body.preheader
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while.body.preheader: ; preds = %entry
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; CHECK: load
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br label %while.body
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while.body: ; preds = %while.body.preheader, %if.end
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%node.020 = phi %struct.node* [ %node.0, %if.end ], [ %node.017, %while.body.preheader ]
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%sum.019 = phi i64 [ %inc, %if.end ], [ 0, %while.body.preheader ]
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%orientation = getelementptr inbounds %struct.node* %node.020, i64 0, i32 4
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%0 = load i64* %orientation, align 8
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%cmp = icmp eq i64 %0, 1
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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 = %while.body
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%a = getelementptr inbounds %struct.node* %node.020, i64 0, i32 5
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; CHECK-NOT: load %struct.arc
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%1 = load %struct.arc** %a, align 8
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%cost = getelementptr inbounds %struct.arc* %1, i64 0, i32 0
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; CHECK-NOT: load i64*
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%2 = load i64* %cost, align 8
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%pred = getelementptr inbounds %struct.node* %node.020, i64 0, i32 1
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; CHECK-NOT: load %struct.node**
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%3 = load %struct.node** %pred, align 8
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%p = getelementptr inbounds %struct.node* %3, i64 0, i32 6
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; CHECK-NOT: load i64*
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%4 = load i64* %p, align 8
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%add = add nsw i64 %4, %2
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%p1 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 6
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; CHECK-NOT: store i64
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store i64 %add, i64* %p1, align 8
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br label %if.end
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; CHECK: if.else
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if.else: ; preds = %while.body
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%pred2 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 1
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; CHECK-NOT: load %struct.node**
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%5 = load %struct.node** %pred2, align 8
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%p3 = getelementptr inbounds %struct.node* %5, i64 0, i32 6
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; CHECK-NOT: load i64*
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%6 = load i64* %p3, align 8
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%a4 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 5
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; CHECK-NOT: load %struct.arc**
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%7 = load %struct.arc** %a4, align 8
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%cost5 = getelementptr inbounds %struct.arc* %7, i64 0, i32 0
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; CHECK-NOT: load i64*
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%8 = load i64* %cost5, align 8
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%sub = sub nsw i64 %6, %8
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%p6 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 6
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; CHECK-NOT: store i64
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store i64 %sub, i64* %p6, align 8
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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: store
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%inc = add nsw i64 %sum.019, 1
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%node.0.in = getelementptr inbounds %struct.node* %node.020, i64 0, i32 2
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%node.0 = load %struct.node** %node.0.in, align 8
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%tobool = icmp eq %struct.node* %node.0, null
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br i1 %tobool, label %while.end.loopexit, label %while.body
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while.end.loopexit: ; preds = %if.end
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%inc.lcssa = phi i64 [ %inc, %if.end ]
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %entry
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%sum.0.lcssa = phi i64 [ 0, %entry ], [ %inc.lcssa, %while.end.loopexit ]
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ret i64 %sum.0.lcssa
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}
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