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