forked from OSchip/llvm-project
97 lines
3.5 KiB
LLVM
97 lines
3.5 KiB
LLVM
; RUN: opt -passes='loop-mssa(licm),print<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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@arr = global [12 x i8] [i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12], align 1
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; CHECK-LABEL: @func()
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define void @func() {
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entry:
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%res.addr.i = alloca i8, align 1
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%sum = alloca i8, align 1
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%n = alloca i8, align 1
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%i = alloca i8, align 1
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%cleanup.dest.slot = alloca i32, align 1
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call void @llvm.lifetime.start.p0i8(i64 1, i8* %sum) #3
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store i8 0, i8* %sum, align 1
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call void @llvm.lifetime.start.p0i8(i64 1, i8* %n) #3
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%call = call i8 @idi(i8 10)
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store i8 %call, i8* %n, align 1
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call void @llvm.lifetime.start.p0i8(i64 1, i8* %i) #3
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store i8 0, i8* %i, align 1
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i8, i8* %i, align 1
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%1 = load i8, i8* %n, align 1
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%cmp = icmp slt i8 %0, %1
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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store i32 2, i32* %cleanup.dest.slot, align 1
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br label %final.cleanup
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for.body: ; preds = %for.cond
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%2 = load i8, i8* %i, align 1
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%idxprom = sext i8 %2 to i32
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%arrayidx = getelementptr inbounds [12 x i8], [12 x i8]* @arr, i32 0, i32 %idxprom
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%3 = load i8, i8* %arrayidx, align 1
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%cmp1 = icmp eq i8 %3, 3
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br i1 %cmp1, label %if.then, label %if.end
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if.then: ; preds = %for.body
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store i32 2, i32* %cleanup.dest.slot, align 1
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br label %final.cleanup
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if.end: ; preds = %for.body
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%4 = load i8, i8* %i, align 1
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%idxprom2 = sext i8 %4 to i32
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%arrayidx3 = getelementptr inbounds [12 x i8], [12 x i8]* @arr, i32 0, i32 %idxprom2
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%5 = load i8, i8* %arrayidx3, align 1
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%6 = load i8, i8* %sum, align 1
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%add = add nsw i8 %6, %5
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store i8 %add, i8* %sum, align 1
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br label %for.inc
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for.inc: ; preds = %if.end
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%7 = load i8, i8* %i, align 1
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%inc = add nsw i8 %7, 1
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store i8 %inc, i8* %i, align 1
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br label %for.cond
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; CHECK: final.cleanup:
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; CHECK-NEXT: ; [[NO20:.*]] = MemoryPhi({if.then,[[NO9:.*]]},{for.cond.cleanup,[[NO8:.*]]})
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; CHECK-NEXT: ; [[NO12:.*]] = MemoryDef([[NO20]])
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; CHECK-NEXT: call void @llvm.lifetime.end.p0i8(i64 1, i8* %i)
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final.cleanup: ; preds = %if.then, %for.cond.cleanup
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call void @llvm.lifetime.end.p0i8(i64 1, i8* %i) #3
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br label %for.end
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; CHECK: for.end:
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; CHECK-NEXT: ; MemoryUse([[NO12]])
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; CHECK-NEXT: %3 = load i8, i8* %sum, align 1
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for.end: ; preds = %final.cleanup
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%8 = load i8, i8* %sum, align 1
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call void @llvm.lifetime.start.p0i8(i64 1, i8* %res.addr.i)
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store i8 %8, i8* %res.addr.i, align 1
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%9 = load i8, i8* %res.addr.i, align 1
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call void @foo(i8 %9) #3
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call void @llvm.lifetime.end.p0i8(i64 1, i8* %res.addr.i)
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call void @llvm.lifetime.end.p0i8(i64 1, i8* %n) #3
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call void @llvm.lifetime.end.p0i8(i64 1, i8* %sum) #3
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ret void
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}
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; Function Attrs: argmemonly nofree nosync nounwind willreturn
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declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
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declare i8 @idi(i8)
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; Function Attrs: argmemonly nofree nosync nounwind willreturn
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
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; Function Attrs: nounwind
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declare void @foo(i8)
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attributes #1 = { argmemonly nofree nosync nounwind willreturn }
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attributes #3 = { nounwind }
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